Midmark 311-005 Service manual [gb]

311

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Power

-005

Examination
Table

Serial Number Prefix:
DZ, EA, xx & HL

Service and

Parts Manual

FOR USE BY MIDMARK
TRAINED TECHNICIANS ONLY

SF-1548 Part No. 004-0058-00 Rev. I (1/0104)

Ritter 311

MA406000

-005

311

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TABLE OF CONTENTS

Section/Paragraph Page Section/Paragraph Page

IMPORTANT INSTRUCTIONS

General Safety Instructions......................................... iii

Warnings ....................................................................iii

Warranty Instructions .................................................. iii

SECTION I GENERAL INFORMATION

1.1 Scope of Manual ......................................... 1-1

1.2 How to Use Manual ..................................... 1-1

1.3 Description of 311 Power Examination

Table ....................................................... 1-1

1.4 Standard Torque Specifications.................... 1- 4

1.5 Specifications ............................................. 1-5

1.6 Parts Replacement Ordering ....................... 1-6

1.7 Special Tools .............................................. 1-6

SECTION II TESTING AND TROUBLESHOOTING

2.1 Operational Test.......................................... 2-1

2.2 Troubleshooting Procedures ........................ 2-2

SECTION III SCHEDULED MAINTENANCE

3.1 Scheduled Maintenance .............................. 3-1

SECTION IV MAINTENANCE/SERVICE
INSTRUCTIONS

4.1 Introduction ................................................. 4-1

4.2 Motor Cover Assembly Removal /

Installation ............................................... 4-1

4.3 Checking / Adding Oil To Motor Pump ........ 4-1

4.4 Up Functions Shuttle Valve Removal /

Installation ............................................... 4-2

4.5 Down Functions Shuttle Valve Removal /

Installation ............................................... 4-3

4.6 Anti-cavitation Solenoid Valve Removal /

Installation ............................................... 4-4

4.7 Up Functions Relief Valve Removal /

Installation ............................................... 4-5

4.8 Down Functions Relief Valve Removal /

Installation ............................................... 4-6

4.9 Motor Pump Assembly - Complete

Removal / Installation .............................. 4-7

4.1 0 Motor Pump Removal / Installation ............. 4-8

4.1 1 Motor Shaft Seal Removal / Installation ...... 4-9

4.1 2 Back Cylinder Removal / Installation......... 4-11

4.1 3 Tilt Cylinder Removal / Installation ............ 4-13

4.1 4 Base Cylinder Removal / Installation ......... 4-15

4.1 5 Foot Cylinder Removal / Installation .......... 4-17

4.1 6 Time Delay Relay Removal /

Installation ............................................. 4-19

4.1 7 Capacitors Removal / Installation .............. 4-20

4.1 8 Pan Safety Limit Switch Removal /

Installation ............................................. 4-21

4.1 9 Chain Assembly Adjustment ..................... 4-23

4.2 0 Base Slide Assembly Removal /

Installation ............................................. 4-23

4.21 Headrest Adjustment................................. 4-27

4.2 2 Headrest Handles Handle Stops

Adjustment ............................................ 4-28

4.2 3 Stirrup Assembly And Components

Removal / Installation ............................ 4-28

4.2 4 Typical Foot Switch Removal /

Installation ............................................. 4-29

4.2 5 Brake Adjustment ..................................... 4-30

4.2 6 Brake Removal / Installation ..................... 4-31

4.2 7 Rotation Bearings Removal / Installation ... 4-31

4.2 8 Upholstery Removal / Installation .............. 4-35

4.2 9 Hydraulic System Flushing Procedure....... 4-38

SECTION V SCHEMATICS AND DIAGRAMS

5.1 Electrical Schematics / Wiring Diagrams..... 5-1

5.2 Hydraulic Flow Diagrams............................. 5-3

SECTION VI PARTS LIST

6.1 Introduction ................................................. 6-1

6.2 Description of Columns ............................... 6-1

6.3 Torque Specifications and Important

Assembly Notes ....................................... 6- 1

Pictorial Index .............................................. 6- 2

Back Components...................................... 6-3.*

Upholstery Set - Thermo .............................. 6- 4

Upholstery Set - Standard ........................... 6-5

Upholstery Set - Narrow .............................. 6-6

Upholstery Set - Styled ............................... 6-7

Hydraulic System......................................... 6- 8

Headrest Assembly....................................6-9.*

Seat Components .................................... 6-10.*

Stirrup Assembly .....................................6-11.*

Footboard Components ............................ 6-12.*

Base Covers And Enclosures .................... 6-13

Side Panel Assembly................................. 6-14

Base Mechanical Components ................. 6-15.*

(*) Indicates that there has been a serial number break for the illustration

and that there are additional point page(s) following the original page.

© Midmark Corporation 1997 SF-1548 Rev. 11/02 Page i Printed in U.S.A.

TABLE OF CONTENTS - CONTINUED

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Section/Paragraph Page Section/Paragraph Page

Rotational Base Assembly ........................ 6-16

Base Slide Assembly................................. 6-17

Base Electrical Components ...................... 6-18

Motor / Pump Components ........................ 6-19

Foot Control Assembly............................... 6-20

COMMENTS ............................................................ 7-1

FAX ORDERING FORM .......................................... 7-2

(*) Indicates that there has been a serial number break for the illustration

and that there are additional point page(s) following the original page.

© Midmark Corporation 1997 SF-1548 Rev. 3/99 Page ii Printed in U.S.A.

IMPORTANT INSTRUCTIONS

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General Safety Instructions

Safety First: The primary concern of Midmark
Corporation is that this table is maintained with the

safety of the patient and staff in mind. To assure that
services and repairs are completed safely and correctly,
proceed as follows:

(1 ) Read this entire manual before performing any

services or repairs on this table.

(2 ) Be sure you understand the instructions con-

tained in this manual before attempting to
service or repair this table.

Safety Alert Symbols

Throughout this manual are safety alert symbols that
call attention to particular procedures. These items are
used as follows:

DANGER

A DANGER is used for an imminently

hazardous operating procedure, prac­tice, or condition which, if not correctly followed,
will result in loss of life or serious personal
injury.

NOTE

A NOTE is used to amplify an operating procedure,
practice or condition.

Warranty Instructions

Refer to the Midmark “Limited Warranty” printed in the
Installation and Operation Manual for warranty informa­tion. Failure to follow the guidelines listed below will
void the warranty and/or render the 311 Power Examina­tion Table unsafe for operation.

• In the event of a malfunction, do not attempt to
operate the table until necessary repairs have been
made.

• Do not attempt to disassemble table, replace mal­functioning or damaged components, or perform
adjustments unless you are one of Midmark’s
authorized service technicians.

• Do not substitute parts of another manufacturer when
replacing inoperative or damaged components. Use
only Midmark replacement parts.

WARNING

A WARNING is used for a potentially

hazardous operating procedure, prac­tice, or condition which, if not correctly followed,
could result in loss of life or serious personal
injury.

CAUTION

A CAUTION is used for a potentially

hazardous operating procedure, practice,
or condition which, if not correctly followed, could
result in minor or moderate injury. It may also be
used to alert against unsafe practices.

EQUIPMENT ALERT

An EQUIPMENT ALERT is used for an

imminently or potentially hazardous
operating procedure, practice, or condition which, if
not correctly followed, will or could result in serious,
moderate, or minor damage to unit.

© Midmark Corporation 1997 SF-1548 Page iii Printed in U.S.A.

© Midmark Corporation 1997 SF-1548 Printed in U.S.A.

Return To Table Of Contents

SECTION I

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GENERAL INFORMATION

SECTION I

GENERAL INFORMATION

1.1 Scope of Manual

This manual contains detailed troubleshooting, sched­uled maintenance, maintenance, and service instruc­tions for 311 Power Examination Table. This manual is
intended to be used by Midmark’s authorized service
technicians.

1.2 How to Use Manual

A. Manual Use When Performing Scheduled Mainte-

nance.
(1) Perform inspections and services listed in

Scheduled Maintenance Chart (Refer to
para 3.1).

(2) If a component is discovered to be faulty or out

of adjustment, replace or adjust component in
accordance with maintenance/service instruc­tions (Refer to para 4.1).

B. Manual Use When Table Is Malfunctioning And

Cause Is Unknown.
(1) Perform an operational test on table (Refer to

para 2.1).

(2) Perform troubleshooting procedures listed in

Troubleshooting Guide (Refer to para 2.2).

(3) If a component is discovered to be faulty or out

of adjustment, replace or adjust component in
accordance with maintenance/service instruc­tions (Refer to para 4.1).

C. Manual Use When Damaged Component Is Known.

(1) Replace or adjust component in accordance

with maintenance/service instructions (Refer to
para 4.1).

1.3 Description Of 311 Power Examina­tion Table

A. General Description (See Figure 1-1).
The 311 Power Examination Table is an examination

table designed specifically for performing general

medical examinations and procedures.
The major serviceable components of the table are the

headrest assembly, motor pump, up functions relief
valve, down functions relief valve, up functions shuttle
valve, down functions shuttle valve, anti-cavitation
solenoid valve, capacitors, control panel with terminal
block and time delay relay, back cylinder, foot cylinder,
tilt cylinder, base cylinder, base slide assembly, chain
assembly, rotation bearings, pan safety limit switch, and
foot switches.

B. Theory of Operation (See Figures 5-1 and 5-2 for

wiring diagrams and electrical schematics, and
Figures 5-3 and 5-4 for hydraulic flow diagrams.)

115 VAC is supplied directly to the circuitry of the table.
Also, 115 VAC is always supplied to the duplex electri­cal receptacle.

Up Functions Electrical Operation:
When no functions are selected, 115 VAC is supplied to

terminals 1 and 2 of all foot switches (when a switch is
unactivated, there is a path between contacts 1 and 2).
There is no path to neutral, however, so no current
flows and nothing happens. When the operator selects
one of the four up functions (BACK UP, TABLE UP,
FOOT UP, or TILT UP) with the foot control, three paths
to neutral are created. Current flows from terminal 2 to
terminal 4 of the selected footswitch and then across
the motor pump winding T2 to neutral, starting the
motor pump pumping. Current also flows from terminal
2 to terminal 4 of the footswitch and then across the coil
of the anti-cavitation solenoid valve, energizing the
valve and causing it to open. Current also flows from
terminal 2 to terminal 3 of the footswitch and then
across the coil of the cylinder solenoid valve and the
time delay relay, energizing the cylinder solenoid valve
and causing it to open. The time delay relay delays
current flow across the coil of the cylinder solenoid
valve for 1/10 of a second, causing it to energize 1/10 of
a second after the motor pump and anti-cavitation
solenoid valve have energized. This allows the motor
pump to run and build oil pressure first, so table top will
not drift downward slightly before starting to rise. The
foot function also has a pan safety limit switch in its
circuit. If the treatment pan assembly is not pushed into
its fully stowed position, the pan safety limit switch will
not be tripped. If the N.O. pan safety limit switch is not

© Midmark Corporation 1997 SF-1548 Page 1-1 Printed in U.S.A.

SECTION I

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GENERAL INFORMATION

HEADREST
ASSEMBLY

BACK

CYLINDER

BASE

CYLINDER

ANTI-CAVITATION
SOLENOID VALVE

MOTOR

PUMP

DOWN FUNCTION

SHUTTLE VALVE

UP FUNCTION

SHUTTLE VALVE

TERMINAL

BLOCK

TIME DELAY

RELAY

DOWN FUNCTION

RELIEF VALVE

PAN SAFETY

LIMIT SWITCH

TILT

CYLINDER

FOOT

CYLINDER

CHAIN

ASSEMBLY

BASE SLIDE

ASSEMBLY

© Midmark Corporation 1997 SF-1548 Page 1-2 Printed in U.S.A.

UP FUNCTION

RELIEF VALVE

CAPACITORS

ROTATION

BEARINGS

Figure 1-1. Major Components

FOOT

SWITCH

FOOT

CONTROL

MA404600

SECTION I

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GENERAL INFORMATION

tripped, current flow is interrupted, keeping the cylinder
solenoid valve from energizing. This safety feature
prevents the table operator from accidentally colliding
the foot section into the treatment pan assembly.

Up Functions Hydraulic Operation:
When the motor pump starts pumping, suction is

created by the rotating pump gears, which allows oil to
defeat the reservoir check valve and flow into the pump
gears. The pump gears pressurize the oil which flows
to the up function shuttle valve. The check ball and
shuttle in the up function shuttle valve are pushed to the
open position by the oil, allowing oil to flow through the
shuttle valve by flowing around the check ball (with the
shuttle in the open position, oil is prevented from flowing
through the reservoir ports and returning to the reser­voir). The oil then flows through the open cylinder
solenoid valve at the base of the selected cylinder,
extending the cylinder rod. When the cylinder rod
extends, oil is forced out of the rod end of the cylinder,
through the open anti-cavitation solenoid valve and to
the down function shuttle valve. The check ball and the
shuttle in the down function shuttle valve are pushed to
the closed position by the oil, which prevents oil from
flowing through the shuttle valve and into the motor
pump, but allows the oil to flow through the newly
uncovered reservoir ports and into the reservoir. When
the cylinder rod reaches the end of its travel, the up
function relief valve opens when the pressure reaches
525 - 600 PSI (36.2 - 41.4 BARS) and allows the oil to
return to the reservoir. This prevents the motor pump
from developing too high of pressures and damaging
the hydraulic system components, hoses, or the motor
pump itself.

When the operator releases the pedal on the foot
control, which is actuating the footswitch, the path to
neutral is opened, causing the motor pump to shut
down and the anti-cavitation solenoid valve and the
cylinder solenoid valve to de-energize, causing the
valves to close.

Down Functions Electrical Operation:
When no functions are selected, 115 VAC is supplied to

terminals 1 and 2 of all foot switches. There is no path
to neutral, however, so no current flows and nothing
happens. When the operator selects one of the four
down functions (BACK DOWN, TABLE DOWN, FOOT
DOWN, or TILT DOWN) with the foot control, two paths
to neutral are created. Current flows from terminal 2 to

terminal 4 of the selected footswitch and then across
the motor pump winding T3 to neutral, starting the
motor pump pumping. Current also flows from terminal
2 to terminal 3 of the footswitch and then across the coil
of the cylinder solenoid valve and the time delay relay,
energizing the cylinder solenoid valve and causing it to
open. The time delay relay delays current flow across
the coil of the cylinder solenoid valve for 1/10 of a
second, causing it to energize 1/10 of a second after
the motor pump has energized. This allows the motor
pump to run and build oil pressure before table is
operated, so table top will not cavitate. The foot
function also has a pan safety limit switch in its circuit.
If the treatment pan assembly is not pushed into its fully
stowed position, the pan safety limit switch will not be
tripped. If the pan safety limit switch is not tripped,
current flow is interrupted, keeping the cylinder solenoid
valve from energizing. This safety feature prevents the
table operator from accidentally colliding the foot
section into the treatment pan assembly.

Down Functions Hydraulic Operation:
When the motor pump starts pumping, suction is

created by the rotating pump gears, which allows oil to
defeat the reservoir check valve and flow into the pump
gears. The pump gears pressurize the oil which flows
to the down function shuttle valve. The check ball and
shuttle in the down function shuttle valve are pushed to
the open position by the oil, allowing oil to flow through
the shuttle valve by flowing around the check ball (with
the shuttle in the open position, oil is prevented from
flowing through the reservoir ports and returning to the
reservoir). The oil then flows through the open anti­cavitation solenoid valve and into the rod end of the
cylinder, causing the cylinder rod to retract. When the
cylinder rod retracts, oil is forced out of the base of the
cylinder, through the open cylinder solenoid valve to the
up function shuttle valve. The check ball and the
shuttle in the up function shuttle valve are pushed to the
closed position by the oil, which prevents oil from
flowing through the shuttle valve and into the motor
pump, but allows the oil to flow through the newly
uncovered reservoir ports and into the reservoir. When
the cylinder rod reaches the end of its travel, the down
functions relief valve opens when the pressure reaches
250 - 325 PSI (17.2 - 22.4 BARS) and allows the oil to
return to the reservoir. This prevents the motor pump
from developing too high of pressures and damaging
the hydraulic system components, hoses, or the motor
pump itself.

© Midmark Corporation 1997 SF-1548 Page 1-3 Printed in U.S.A.

SECTION I

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GENERAL INFORMATION

When the operator releases the pedal on the foot
control, which is actuating the footswitch, the path to
neutral is opened, causing the motor pump to shut
down and the cylinder solenoid valve to de-energize,
causing the valve to close.

General Information:
The anti-cavitation solenoid valve is in the hydraulic

system to prevent oil from escaping out of the rod end
of a cylinder while the table is not being moved. Other­wise, a cylinder rod would be able to extend on its own
if upward pressure was placed on that function of the
table top by the doctor or patient.

The cylinder solenoid valves are in the hydraulic system
to prevent oil from escaping out of the base of the
cylinder assemblies. Otherwise, a cylinder assembly
could retract on its own, allowing the table top to drift.

1.4 Standard Torque Specifications

The following standard torque specifications in Table
1-1 apply to the various hardware used on the units
unless otherwise listed elsewhere in service procedures
or parts illustrations:

Table 1-1. Torque Specifications

Hardware Size Torque Values

#6 ........................... 11 to 21 inch / lbs. (1.2 to 2.3 N•M)

#8 ........................... 20 to 30 inch / lbs. (2.2 to 3.3 N•M)

#10 ......................... 32 to 42 inch / lbs. (3.6 to 4.8 N•M)

1/4" ......................... 75 to 85 inch / lbs. (8.5 to 9.6 N•M)

5/16" .................... 18 to 22 foot / lbs. (24.4 to 29.8 N•M)

3/8" ...................... 31 to 35 foot / lbs. (42.0 to 47.5 N•M)

1/2" ...................... 50 to 60 foot / lbs. (67.8 to 81.4 N•M)

1.5 SPECIFICATIONS

Factual data for the 311 Power Examination Table is
provided in Table 1-2. Also, see Figure 1-2.

Table 1-2. Specifications

Description Data

Weight:

Without Shipping Carton................ 515 lb (233.5 kg)

With Shipping Carton..................... 592 lb (268.4 kg)

Shipping Carton....... 58 in. "L" x 31 in. "W" x 42 in. "H"

(147 cm x 79 cm x 107 cm)

Dimensions (See Figure 1-2):

Table Top Length ............................ 70 in. (177.8 cm)

Table Top Length (headrest extended).............. 80 in.

(203.2 cm)

Table Top Width ................................ 27 in. (68.6 cm)

Overall Width..................................... 27 in. (68.6 cm)

Table Height Positioning:................... 28.5 in. to 44.5 in.

(72 cm to 113 cm)

Weight Capacity ................................ 325 lb (147.3 kg)

Oil Used In Hydraulic System ....................... light grade

medicinal mineral oil

Hydraulic System

Oil Capacity .................... Approx. 2.5 quarts (2.4 liters)

Motor Pump Reservoir Capacity....... 1 quart (.946 liter)

Electrical Requirements:

115 VAC Unit........................... 110 - 120 VAC, 60 HZ,

12 amp, single phase

© Midmark Corporation 1997 SF-1548 Page 1-4 Printed in U.S.A.

Power Consumption:

115 VAC Unit........................................... 960 WATTS,

8 amps @ 120 VAC

Recommended Circuit:

A separate (dedicated) circuit is recommended for
this table. The table
electrical circuit with other appliances or equipment
unless the circuit is rated for the additional load.

should not

be connected to an

70" LONG (MIN.)

Return To Table Of Contents

80" LONG (MAX.)

SECTION I

GENERAL INFORMATION

23"
WIDE
BASE

21"

(MIN.)

6'

CORD

87

°

90°

27"

BASE

45°

4'

CORD

27"
WIDE
SEAT

28.5"

(Min.)

44.5"

(MAX.)

MA404900

Figure 1-2. Table Dimensions

Up Function Relief Valve Setting ........... Valve opens at

525 to 600 PSI

(36.2 to 41.4 BARS)

A

B

MA405000

Figure 1-3. Model Number / Serial

Number Location

(2) Refer to the Parts List to determine the item

numbers of the parts, part numbers of the
parts, descriptions of the parts, and quantities
of parts needed and record this data (Refer to
para 6.1).

Down Function Relief Valve Setting....... Valve opens at

250 to 325 PSI

(17.2 to 22.4 BARS)

1.6 Parts Replacement Ordering

If a part replacement is required, order the part directly
from the factory as follows:

NOTE

It is

important

Number

ing a service call, or seeking technical advice.

(1) Refer to Figure 1-3 to determine the location of

the model number and serial number of the
table and record this data.

that the

entire Model and Serial

be presented when ordering parts, schedul-

NOTE

Ask the Purchasing Department of the company that
owns the table for this information. Otherwise, this
information may be obtained from the dealer that
sold the table.

(3) Determine the installation date of the table and

record this data.

(4) Call Midmark with the recorded information and

ask for the Medical Products Technical Ser­vices Department. See back cover of this
manual for the phone number or use the Fax
Order Form (See page 7-2 for Fax Order
Form).

1.7 Special Tools

Table 1-3 lists all of the special tools needed to repair
the table, how to obtain the special tools, and the
purpose of each special tool.

© Midmark Corporation 1997 SF-1548 Page 1-5 Printed in U.S.A.

SECTION I

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GENERAL INFORMATION

Table 1-3. Special Tool List

Description of Special Tool

Multimeter Commercially Available Any Type Used to perform continuity and voltage checks.
Retaining Ring Pliers - Large Commercially Available Any Type Used to remove / install retaining ring which is

Torque Wrench Commercially Available Any Type Used with spanner socket to torque rotation nut.
Spanner Socket Midmark Corp.

Manufacturer's

Name / Address / Phone

60 Vista Drive
Versailles, Ohio 45380
[phone]
Call Midmark's Medical
Products Technical Services
Department to request a loan of
the tool.

Manufacturer's

Part Number

removed during rotation bearing replacement.

M05234 Used to remove / install rotation nut which secures

rotation base to platform base weldment.

Purpose of Special Tool

© Midmark Corporation 1997 SF-1548 Page 1-6 Printed in U.S.A.

2.1 Operational Test

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SECTION II

TESTING AND TROUBLESHOOTING

SECTION II

TESTING AND TROUBLESHOOTING

In order to effectively diagnose the malfunction of the
table, it may be necessary to perform an operational
test as follows:

WARNING

Refer to the Operator Manual for

complete instructions on operating the
table. Failure to do so could result in personal
injury.

NOTE

The Operational Test, for the most part, only de­scribes what should happen when the table is
operated. If the table does something other than
described, a problem has been discovered. Refer to
the Troubleshooting Guide to determine the cause of
the problem and its correction.

(1) Plug the table into a grounded, non-isolated,

correctly polarized outlet that has the proper
voltage output for the table.

(2) Depress TABLE UP, TABLE DOWN, BACK

UP, BACK DOWN, TILT UP, TILT DOWN,
FOOT UP, and FOOT DOWN pedals on foot
control.

(3) Observe. The table top should move in the

direction corresponding to the pedal which is
being depressed. Movement should be steady
and should not be too slow or too fast.

(4) Lower FOOT DOWN function all the way. Pull

the pan slide assembly outward until pan safety
limit switch is no longer tripped. Depress either
FOOT UP or FOOT DOWN pedal on foot
control.

TABLE

TOP

BACK

SECTION

SEAT

SECTION

FOOT

SECTION

PAN SLIDE
ASSEMBLY
(OPTIONAL

ON SOME

UNITS)

FOOT

CONTROL

MA405100

Figure 2-1. Operational Test

(7) Observe. The foot section of table top should

move when FOOT UP or FOOT DOWN pedal

is depressed.
(8) Raise TABLE UP function all the way up.
(9) Move ROTATION lever to UNLOCK position.

Attempt to rotate table top.

(5) Observe. The foot section of table top should

not move when either FOOT UP or FOOT
DOWN pedal is depressed.

(6) Push pan slide assembly inward until pan

safety limit switch is tripped. Depress either
FOOT UP or FOOT DOWN pedal on foot
control.

© Midmark Corporation 1997 SF-1548 Page 2-1 Printed in U.S.A.

(10) Observe. The table should rotate easily and

quietly; no binding should be felt or heard

when rotating table top.

(11) Move ROTATION lever to LOCK position.

Attempt to rotate table top.

(12) Observe. The table top should not be able to

be rotated.

SECTION II

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TESTING AND TROUBLESHOOTING

2.2 Troubleshooting Procedures

Table 2-1 is a Troubleshooting Guide which is used to
determine the cause of the malfunction.

Table 2-1. Troubleshooting Guide

Problem Symptom Probable Cause Check Correction

Table will not operate
when any of the eight up
or down functions are
selected.

When a foot pedal is
depressed, motor pump
does not run and solenoid
cannot be heard being
energized (audible click).

When a foot pedal is
depressed, motor pump
does not run, but solenoid
can be heard being
energized (audible click).

Power cord is not plugged
into facility wall outlet or, on
export models, power cord
isn't plugged into connector
receptacle on table.

Facility circuit breaker
providing power to table is
tripped.

Fuse(s) in AC connector
receptacle is blown (export
units only).

Wire connections loose. Check all wiring

Capacitor(s) is blown
(motor pump may be
humming).

Check to see if power cord
is plugged in.

Check to see if facility
circuit breaker is tripped.
One way of checking this is
to plug a lamp into wall
outlet that table was
plugged into.

Perform continuity check
on fuses.

connections from power
cord to terminal block and
from foot control to terminal
block. Perform continuity
check on wires. Use
multimeter to check for
proper voltage levels.

Replace suspect
capacitor(s) with known
working capacitor(s).

Plug power cord into facility
wall outlet and/or connector
receptacle on table.

If circuit breaker is tripped,
determine what caused circuit
breaker to trip, correct the
problem, and then
reset/replace circuit breaker.

Replace fuse(s).

Clean any dirty connections.
Tighten any loose
connections. Replace any
damaged connections.

Replace capacitor(s). Refer
to para 4.17.

Motor thermal overload
switch is activated because
motor pump overheated.

Motor pump is burned out. Replace suspect motor

Wire connections loose. Check all wiring

Wait 15 to 20 minutes. Allow motor pump to cool and

pump with known working
motor pump.

connections from terminal
block to motor pump. Use
multimeter to check for
proper voltage levels.

then try to operate table. If
motor pump does not run
now, replace motor pump.
Refer to para 4.9 or 4.10.

Replace motor pump. Refer
to para 4.9 or 4.10.

Clean any dirty connections.
Tighten any loose
connections. Replace any
damaged connections.

© Midmark Corporation 1997 SF-1548 Page 2-2 Printed in U.S.A.

TESTING AND TROUBLESHOOTING

Return To Table Of Contents

Table 2-1. Troubleshooting Guide - Continued

Problem Symptom Probable Cause Check Correction

Table will not operate
when any of the eight up
or down functions are
selected - Continued.

The TABLE UP, BACK
UP, TILT UP, and FOOT
UP functions do not
work, but TABLE
DOWN, BACK DOWN,
TILT DOWN, and FOOT
DOWN functions do.

When a foot pedal is
depressed, motor pump
runs, but table top does
not move.

When a foot pedal is
depressed, motor pump
runs and solenoid can be
heard energizing.

When a foot pedal is
depressed, motor pump
hums, but does not run.

Motor pump runs when an
up function foot pedal is
depressed, but table top
does not move.

Motor pump does not run
when an up function foot
pedal is depressed, but
does when a down
function foot pedal is
depressed.

Time delay relay is
malfunctioning.

Hydraulic system is low on
mineral oil.

Capacitor(s) is blown. Replace suspect

Motor pump is locked up or
burned out.

Anti-cavitation solenoid
valve is malfunctioning.

Wire connections loose. Check all wiring

Up function shuttle valve is
malfunctioning.

Motor pump is defective. Replace suspect motor

Motor pump is defective. Replace suspect motor

Use a jumper wire to
bypass time delay relay. If
table top moves now, time
delay relay is
malfunctioning.

Check oil level in reservoir. If necessary, add oil to

capacitor(s) with known
working capacitor(s).

Replace suspect motor
pump with known working
motor pump.

Check for slight magnetism
on bottom side of
anti-cavitation solenoid
valve, indicating solenoid is
not burned out or replace
suspect anti-cavitation
solenoid valve with known
working anti-cavitation
solenoid valve.

connections from terminal
block to anti-cavitation
solenoid valve. Use
multimeter to check for
proper voltage levels.

Check to see if check ball
is loose in up function
shuttle valve or adjacent
elbow (check ball should
be held in shuttle valve by
metal ring).

pump with known working
motor pump.

pump with known working
motor pump.

Replace time delay relay.
Refer to para 4.16.

reservoir. Refer to para 4.3.

Replace capacitor(s). Refer
to para 4.17.

Replace motor pump. Refer
to para 4.9 or 4.10.

Replace anti-cavitation
solenoid valve. Refer to
para 4.6.

Clean any dirty connections.
Tighten any loose
connections. Replace any
damaged connections.

Replace up function shuttle
valve. Refer to para 4.4.

Replace motor pump. Refer
to para 4.9 or 4.10.

Replace motor pump. Refer
to para 4.9 or 4.10.

SECTION II

© Midmark Corporation 1997 SF-1548 Page 2-3 Printed in U.S.A.

Wire connection in foot
control is loose.

Check all wiring
connections in foot control.

Clean any dirty connections.
Tighten any loose
connections. Replace any
damaged connections.

SECTION II

Return To Table Of Contents

TESTING AND TROUBLESHOOTING

Table 2-1. Troubleshooting Guide - Continued

Problem Symptom Probable Cause Check Correction

The TABLE DOWN,
BACK DOWN, TILT
DOWN, and FOOT
DOWN functions do not
work, but TABLE UP,
BACK UP, TILT UP, and
FOOT UP functions do.

Motor pump runs when a
down function foot pedal
is depressed, but table top
does not move.

Down function shuttle valve
is malfunctioning.

Motor pump is defective. Replace suspect motor

Check to see if check ball
is loose in down function
shuttle valve or adjacent
elbow (check ball should
be held in shuttle valve by
metal ring).

pump with known working
motor pump.

Replace down function shuttle
valve. Refer to para 4.5.

Replace motor pump. Refer
to para 4.9 or 4.10.

TABLE UP function
works, but TABLE
DOWN function does not
or TABLE DOWN
function works but
TABLE UP function
does not. All other
functions work.

BACK UP function
works, but BACK DOWN
function does not or
BACK DOWN function
works but BACK UP
function does not. All
other functions work.

Motor pump does not run
when a down function foot
pedal is depressed, but
runs when an up function
is pressed.

Motor pump does not run
and base cylinder
solenoid valve does not
energize.

Motor pump runs but base
cylinder solenoid valve
does not energize or vice
versa.

Motor pump does not run
and back cylinder
solenoid valve does not
energize.

Motor pump runs but back
cylinder solenoid valve
does not energize or vice
versa.

Motor pump is defective. Replace suspect motor

Wire connection in foot
control is loose.

TABLE UP or TABLE
DOWN foot switch is
malfunctioning.

Wire connection to foot
switch is loose.

TABLE UP or TABLE
DOWN foot switch is
malfunctioning.

BACK UP or BACK DOWN
foot switch is
malfunctioning.

Wire connection to foot
switch is loose.

BACK UP or BACK DOWN
foot switch is
malfunctioning.

pump with known working
motor pump.

Check all wiring
connections in foot control.

Perform a continuity check
on suspect foot switch in
ON and OFF positions or
replace suspect foot switch
with known working foot
switch.

Check all wiring
connections on suspect
foot switch.

Perform a continuity check
on suspect foot switch in
ON and OFF positions or
replace suspect foot switch
with known working foot
switch.

Perform a continuity check
on suspect foot switch in
ON and OFF positions or
replace suspect foot switch
with known working foot
switch.

Check all wiring
connections on suspect
foot switch.

Perform a continuity check
on suspect foot switch in
ON and OFF positions or
replace suspect foot switch
with known working foot
switch.

Replace motor pump. Refer
to para 4.9 or 4.10.

Clean any dirty connections.
Tighten any loose
connections. Replace any
damaged connections.

Replace foot switch. Refer to
para 4.24.

Clean any dirty connections.
Tighten any loose
connections. Replace any
damaged connections.

Replace foot switch. Refer to
para 4.24.

Replace foot switch. Refer to
para 4.24.

Clean any dirty connections.
Tighten any loose
connections. Replace any
damaged connections.

Replace foot switch. Refer to
para 4.24.

© Midmark Corporation 1997 SF-1548 Page 2-4 Printed in U.S.A.

TESTING AND TROUBLESHOOTING

Return To Table Of Contents

Table 2-1. Troubleshooting Guide - Continued

Problem Symptom Probable Cause Check Correction

TILT UP function works,
but TILT DOWN function
does not or TILT DOWN
function works but TILT
UP function does not.
All other functions work.

FOOT UP function
works, but FOOT DOWN
function does not or
FOOT DOWN function
works but FOOT UP
function does not. All
other functions work.

TABLE UP and TABLE
DOWN functions do not
work. All other functions
work.

Motor pump does not run
and tilt cylinder solenoid
valve does not energize.

Motor pump runs but tilt
cylinder solenoid valve
does not energize or vice
versa.

Motor pump does not run
and foot cylinder solenoid
valve does not energize.

Motor pump runs but foot
cylinder solenoid valve
does not energize or vice
versa.

Motor pump runs when
TABLE UP or TABLE
DOWN foot pedal is
depressed, but table top
does not move.

TILT UP or TILT DOWN foot
switch is malfunctioning.

Wire connection to foot
switch is loose.

TILT UP or TILT DOWN foot
switch is malfunctioning.

FOOT UP or FOOT DOWN
foot switch is
malfunctioning.

Wire connection to foot
switch is loose.

FOOT UP or FOOT DOWN
foot switch is
malfunctioning.

Base cylinder solenoid valve
is malfunctioning.

White wire running from
terminal 3 of foot switch to
terminal block is broken or
disconnected.

Wire running from terminal
block to base cylinder
solenoid valve is broken or
disconnected.

Perform a continuity check
on suspect foot switch in
ON and OFF positions or
replace suspect foot switch
with known working foot
switch.

Check all wiring
connections on suspect
foot switch.

Perform a continuity check
on suspect foot switch in
ON and OFF positions or
replace suspect foot switch
with known working foot
switch.

Perform a continuity check
on suspect foot switch in
ON and OFF positions or
replace suspect foot switch
with known working foot
switch.

Check all wiring
connections on suspect
foot switch.

Perform a continuity check
on suspect foot switch in
ON and OFF positions or
replace suspect foot switch
with known working foot
switch.

Check to see if base
cylinder solenoid valve
energizes (audible click)
when foot pedal is
depressed.

Check continuity of wire
and connections.

Check continuity of wire
and connections.

Replace foot switch. Refer to
para 4.24.

Clean any dirty connections.
Tighten any loose
connections. Replace any
damaged connections.

Replace foot switch. Refer to
para 4.24.

Replace foot switch. Refer to
para 4.24.

Clean any dirty connections.
Tighten any loose
connections. Replace any
damaged connections.

Replace foot switch. Refer to
para 4.24.

Replace base cylinder. Refer
to para 4.14.

Clean any dirty connections.
Tighten any loose
connections. Replace any
damaged connections.

Clean any dirty connections.
Tighten any loose
connections. Replace any
damaged connections.

SECTION II

© Midmark Corporation 1997 SF-1548 Page 2-5 Printed in U.S.A.

SECTION II

Return To Table Of Contents

TESTING AND TROUBLESHOOTING

Table 2-1. Troubleshooting Guide - Continued

Problem Symptom Probable Cause Check Correction

BACK UP and BACK
DOWN functions do not
work. All other functions
work.

Motor pump runs when
BACK UP or BACK
DOWN foot pedal is
depressed, but table does
not move.

Back cylinder solenoid valve
is malfunctioning.

Check to see if back
cylinder solenoid valve
energizes (audible click)
when foot pedal is
depressed.

Replace back cylinder. Refer
to para 4.12.

TILT UP and TILT
DOWN functions do not
work. All other functions
work.

FOOT UP and FOOT
DOWN functions do not
work. All other functions
work.

Motor pump runs when
TILT UP or TILT DOWN
foot pedal is depressed,
but table does not move.

Motor pump runs when
FOOT UP or FOOT
DOWN foot pedal is
depressed, but foot
section does not move.

White/black wire running
from terminal 3 of foot
switch to terminal block is
broken or disconnected.

Wire running from terminal
block to back cylinder
solenoid valve is broken or
disconnected.

Tilt cylinder solenoid valve is
malfunctioning.

Orange wire running from
terminal 3 of foot switch to
terminal block is broken or
disconnected.

Wire running from terminal
block to tilt cylinder solenoid
valve is broken or
disconnected.

Foot cylinder solenoid valve
is malfunctioning.

Red/black wire running from
terminal 3 of foot switch to
terminal block is broken or
disconnected.

Wires running from terminal
block to pan safety limit
switch and foot cylinder
solenoid valve are broken or
disconnected.

Treatment pan assembly is
not pushed in all the way
(applies only to units with an
optional treatment plan).

Check continuity of wire
and connections.

Check continuity of wire
and connections.

Check to see if tilt cylinder
solenoid valve energizes
(audible click) when foot
pedal is depressed.

Check continuity of wire
and connections.

Check continuity of wire
and connections.

Check to see if foot
cylinder solenoid valve
energizes (audible click)
when foot pedal is
depressed.

Check continuity of wire
and connections.

Check continuity of wire
and connections.

Check that the treatment
pan assembly is pushed in
all the way.

Clean any dirty connections.
Tighten any loose
connections. Replace any
damaged connections.

Clean any dirty connections.
Tighten any loose
connections. Replace any
damaged connections.

Replace tilt cylinder. Refer to
para 4.13.

Clean any dirty connections.
Tighten any loose
connections. Replace any
damaged connections.

Clean any dirty connections.
Tighten any loose
connections. Replace any
damaged connections.

Replace foot cylinder. Refer
to para 4.15.

Clean any dirty connections.
Tighten any loose
connections. Replace any
damaged connections.

Clean any dirty connections.
Tighten any loose
connections. Replace any
damaged connections.

Push treatment pan assembly
in all the way.

© Midmark Corporation 1997 SF-1548 Page 2-6 Printed in U.S.A.

TESTING AND TROUBLESHOOTING

Return To Table Of Contents

Table 2-1. Troubleshooting Guide - Continued

Problem Symptom Probable Cause Check Correction

FOOT UP and FOOT
DOWN functions do not
work. All other functions
work - Continued.

Any of the four functions
drift by themselves.

Back section of table top
may be lifted by hand or
tilt function may drift by
itself.

Table moves fine for
light patient, but will not
move or moves slowly
for very heavy patient.

Excessive sideways play
of table top.

Rotational base not
working.

Motor pump runs when
FOOT UP or FOOT
DOWN foot pedal is
depressed, but foot
section does not move ­Continued (applies only to
units with an optional
treatment pan).

Table functions properly
otherwise.

Table functions properly
otherwise.

Occurs for both the up
and down functions.

Occurs for up functions
only.

Occurs for down functions
only.

Table is not stable and
can be moved from side
to side.

Table top is binding when
rotated.

Table top can still be
rotated when ROTATION
lever is in LOCK position.

Pan safety limit switch is out
of adjustment.

Pan safety limit switch is
malfunctioning.

A cylinder solenoid valve is
stuck in open position or is
malfunctioning.

A foot switch is
malfunctioning and holding
cylinder solenoid valve in
the open position.

Anti-cavitation solenoid
valve is malfunctioning.

Hydraulic system is low on
mineral oil.

Up functions and down
functions relief valves are
malfunctioning.

Up functions relief valve is
malfunctioning.

Down function relief valve is
malfunctioning.

Chain assemblies are loose. Check tension of chain

Base slide assembly is worn
or deformed.

Brake is out of adjustment. Check adjustment of brake. Adjust brake. Refer to para

Rotation bearings are
contaminated or worn.

Brake is out of adjustment. Check adjustment of brake. Adjust brake. Refer to para

Check to see if pan safety
limit switch is being tripped
by treatment pan
assembly.

Perform continuity check
on pan safety limit switch
(pan in = closed).

Try to flush foreign objects
out of cylinder solenoid
valve by running oil
through cylinder in both
directions ten times.

Use multimeter to check for
voltage at terminal 3 of
suspect foot switch (no
voltage should be present
when foot switch is in OFF
position).

Replace suspect
anti-cavitation solenoid
valve with known working
anti-cavitation solenoid
valve.

Check oil level in reservoir. If necessary, add oil to

Replace suspect relief
valves with known working
relief valves.

Replace suspect up
functions relief valve with
known working relief valve.

Replace suspect down
functions relief valve with
known working relief valve.

assemblies.

Check condition of base
slide assembly.

Check rotation bearings for
wear or contamination.

Adjust pan safety limit switch
so it is tripped when treatment
pan assembly is pushed in all
the way.

Replace pan safety limit
switch. Refer to para 4.18.

Replace malfunctioning
cylinder assembly.

Replace foot switch. Refer to
para 4.24

Replace anti-cavitation
solenoid valve. Refer to para

4.6.

reservoir. Refer to para 4.3.

Replace up functions and
down functions relief valves.
Refer to paras 4.7 and 4.8.

Replace up functions relief
valve. Refer to para 4.7.

Replace down functions relief
valve. Refer to para 4.8.

Adjust tension of chain
assemblies. Refer to para

4.19.
Replace base slide assembly.

Refer to para 4.20.

4.25.
Replace rotation bearings.

Refer to para 4.27.

4.25.

SECTION II

© Midmark Corporation 1997 SF-1548 Page 2-7 Printed in U.S.A.

SECTION II

Return To Table Of Contents

TESTING AND TROUBLESHOOTING

© Midmark Corporation 1997 SF-1548 Page 2-8 Printed in U.S.A.

SCHEDULED MAINTENANCE

Return To Table Of Contents

SECTION III

SCHEDULED MAINTENANCE

SECTION III

3.1 Scheduled Maintenance

periodically on the table. These inspections and
services should be performed as often as indicated in

Table 3-1 is a Scheduled Maintenance Chart which lists

the chart.

the inspections and services that should be performed

Table 3-1. Scheduled Maintenance Chart

Interval Inspection or Service What to Do

Semi-annually Obvious damage Visually check condition of table for obvious damage such as: cracks in components, missing

Fasteners/hardware Check table for missing or loose fasteners/hardware. Replace any missing hardware and tighten

Warning and
instructional decals

Pivot points/moving
parts/accessories

Hydraulic hoses and
fittings

Foot control Check that foot control works correctly. Make sure foot pedal foot switches are working correctly.

Hydraulic functions Check that all four functions operate properly. If not, refer to the Troubleshooting Guide to

Cylinders Inspect all cylinders for signs of internal leaking or for weak operation. Replace cylinders as

Drift in table Run each cylinder to full extension. Then, observe each cylinder to see if it drifts. Replace

Oil level Check oil level in motor pump. Add oil to motor pump if necessary. Refer to para 4.3.
Stirrup Assemblies Check that stirrup assemblies lock into one of three positions. Check for wear. Replace

Headrest Assembly Check headrest for proper adjustment. If headrest does not have enough holding power, adjust

Pan safety limit switch Check that pan safety limit switch prevents foot function from moving when limit switch is not

Rotation function Check rotation bearings for easy rotation. Replace rotation bearings if necessary. Refer to para

Excessive sideways play
of table top

Anti-cavitation solenoid
valve

Electrical outlets Check that the electrical outlets are functioning properly. Replace electrical outlets as necessary.

components, dents in components, leaking oil, or any other visible damage which would cause
table to be unsafe to operate or would compromise its performance. Repair table as necessary.

any loose hardware as necessary.
Check for missing or illegible decals. Replace decals as necessary.

Lubricate all exposed pivot points, moving parts, and accessories with silicone based lubricant.

Check all hydraulic hoses and fittings for leaks. Replace any components causing leaks.
Replace any hoses which have kinks, cuts, holes, or other damage.

If not, replace foot switches. Refer to para 4.24.

determine the cause of the problem. Clean or replace components as necessary.

necessary.

cylinder if necessary.

components as necessary. Refer to para 4.23.

headrest handles. Refer to para 4.21.

tripped. Adjust or replace pan safety limit switch if necessary. Refer to para 4.18.

4.27. Check that brake functions properly. Adjust or replace brake if necessary. Refer to para

4.25 or 4.26.
Check that table top does not have excessive side play. Adjust chain assembly if necessary.

Refer to para 4.19.
Check to see if back section may be lifted by hand or if the tilt function drifts by itself. If so,

replace anti-cavitation solenoid valve. Refer to para 4.6.

Upholstery Check all upholstery for rips, tears, or excessive wear. Replace cushions as necessary.

Accessories Check that all accessories have all of their components and that they function properly. If

Operational Test Perform an Operational Test to determine if the table is operating within its specifications (Refer

© Midmark Corporation 1997 SF-1548 Page 3-1 Printed in U.S.A.

necessary, repair or replace the accessory.

to para 2.1). Replace or adjust any malfunctioning components.

SECTION III

Return To Table Of Contents

SCHEDULED MAINTENANCE

© Midmark Corporation 1997 SF-1548 Page 3-2 Printed in U.S.A.

MAINTENANCE / SERVICE INSTRUCTIONS

Return To Table Of Contents

4.1 Introduction
WARNING

Refer to the Operator Manual for
complete instructions on operating the

table. Failure to do so could result in personal
injury.

NOTE

Perform an operational test on the table after the
repair is completed to confirm the repair was properly
made and that

The following paragraphs contain removal, installa­tion, repair, and adjustment procedures for the table.

4.2 Motor Cover Assembly Removal /

Installation

all

malfunctions were repaired.

SECTION IV

MAINTENANCE / SERVICE

SECTION IV

A

2

3

1

MA399000

A. Removal

WARNING

Always disconnect the power cord

from the outlet before removing any of the table's
covers/shrouds or making any repairs to prevent
the possibility of electrical shock. Failure to
comply with these instructions could result in
severe personal injury or death.

(1 ) Unplug table power cord from outlet.
(2 ) Remove six screws (1, Figure 4-1) and motor

cover assembly (2) from back outer shroud (3).

B. Installation

(1 ) Install motor cover assembly (2) against back

outer shroud (3) and secure with six screws (1),
making sure top edge of motor cover assembly
is inserted behind lip of back outer shroud.

(2 ) Plug table power cord into outlet.

Figure 4-1. Motor Cover Assembly

Removal / Installation

4.3 Checking / Adding Oil To Motor Pump

A. Checking / Adding Oil

(1 ) Move the BASE DOWN, BACK DOWN, TILT

DOWN, and FOOT DOWN functions all the way
down.

(2 ) Remove motor cover assembly (Refer to

para 4.2).

(3 ) Remove filler cap (1, Figure 4-2) from motor

pump (2).

NOTE

Newer models do not have oil level check hole (A) or
screw (3). Check oil level at fill port.

(4 ) Remove screw (3) and gasket (4) from motor

pump (2).

© Midmark Corporation 1997 SF-1548 Rev. 6/02 Page 4-1 Printed in U.S.A.

(5) Check oil level. If oil level in reservoir is not

even with oil level check hole, oil must be
added.

(6 ) Place a rag under oil level check hole.

SECTION IV

3

4

2

1

A

B

Return To Table Of Contents

MAINTENANCE / SERVICE

4.4 Up Functions Shuttle Valve Removal /
Installation

A. Removal

WARNING

Always disconnect the power cord

from the outlet before removing any of
the table's covers/shrouds or making any repairs
to prevent the possibility of electrical shock.
Failure to comply with these instructions could
result in severe personal injury or death.

(1) Unplug table power cord from outlet.
(2) Remove motor cover (Refer to para 4.2).

NOTE

The up functions shuttle valve is lower than the oil
level in the motor pump reservoir and oil will flow out
of the up functions shuttle valve once the hose
assembly is disconnected.

(3) Place drain pan (A) under up functions shuttle

valve (1, Figure 4-3).

MA399500

Figure 4-2. Checking / Adding Oil To Motor Pump

EQUIPMENT ALERT

Hydraulic system is designed for use with
light grade mineral oil only. Failure to

comply could result in hydraulic system failure.

(7) Add oil to fill hole (B) until oil starts to run out of

oil level check hole (A).

(8) Install gasket (4) and screw (3) on motor

pump (2).

(9) Install filler cap (1) on motor pump (2).

(4) Disconnect hose assembly (2) from elbow (B)

of up functions shuttle valve (1).

(5) Remove up functions shuttle valve (1) from

motor pump (3).

B. Installation

(1) Coat two o-rings (C) on up functions shuttle

valve (1) with mineral oil or vaseline.

(2) Install up functions shuttle valve (1) in motor

pump (3).

(3) Connect hose assembly (2) to elbow (B) of up

functions shuttle valve (1).

(10) Move each function to its up and down limit

several times. Then repeat steps 1 thru 9.

(11) Install motor cover assembly (Refer to

para 4.2).

(12) Dispose of used oil in accordance with local

regulations.

(4) If necessary, add oil to motor pump (Refer to

para 4.3).

(5) Install motor cover assembly (Refer to

para 4.2).
(6) Plug table power cord into outlet.
(7) Dispose of used oil in accordance with local

regulations.

© Midmark Corporation 1997 SF-1548 Page 4-2 Printed in U.S.A.

B

Return To Table Of Contents

SECTION IV

MAINTENANCE / SERVICE

NOTE

The down functions shuttle valve is slightly lower

C

than the oil level in the motor pump reservoir and oil
will flow out of the down functions shuttle valve once
the hose assembly is disconnected.

(3) Place rags or drain pan (A) under down func-

tions shuttle valve (1, Figure 4-4).

3

C

4

1

2

A

Figure 4-3. Up Functions Shuttle Valve

Removal / Installation

MA399600

4.5 Down Functions Shuttle Valve
Removal / Installation

A. Removal

WARNING

Always disconnect the power cord

from the outlet before removing any of
the table's covers/shrouds or making any repairs
to prevent the possibility of electrical shock.
Failure to comply with these instructions could
result in severe personal injury or death.

(1) Unplug table power cord from outlet.
(2) Remove motor cover assembly (Refer to

para 4.2).

2

1

3

B

A

MA399700

Figure 4-4. Down Functions Shuttle Valve

Removal / Installation

(4) Using a wrench to hold male connector (2)

stationary, loosen jam nut (B) of elbow (3).
Disconnect elbow from male connector.

(5) Remove elbow (3) from down function shuttle

valve (1).

(6) Remove down functions shuttle valve (1) from

motor pump (4).

© Midmark Corporation 1997 SF-1548 Page 4-3 Printed in U.S.A.

SECTION IV

Return To Table Of Contents

MAINTENANCE / SERVICE

B. Installation

NOTE

The down functions shuttle valve is sent from factory
with an elbow installed on it. Remove it per step 1.

(1) Remove elbow from down function shuttle

valve (1). Discard elbow.

(2) Coat two o-rings on down functions shuttle

valve (1) with mineral oil or vaseline.

(3) Install down functions shuttle valve (1) in motor

pump (4).

(4) Coat threads of male connector (2) and elbow

(3) with pipe thread tape or sealant.

(5) Install elbow (3) on down functions shuttle

valve (1).

(6) Connect elbow (3) to male connector (2) and

secure by tightening jam nut.

(5) Pull anti-cavitation solenoid valve wires (4) out

thru wire hole (B).
(6) Disconnect hose assembly (6) from elbow (7).
(7) Using a wrench to hold male connector (8)

stationary, loosen jam nut (C) of elbow (9).

Disconnect male connector from elbow.
(8) Remove elbow (7) and male connector (8) from

anti-cavitation solenoid valve (10).

2

10

C

7

1

8

(7) If necessary, add oil to motor pump (Refer to

para 4.3).

(8) Install motor cover assembly (Refer to

para 4.2).

(9) Plug table power cord into outlet.

(10) Dispose of used oil in accordance with local

regulations.

4.6 Anti-Cavitation Solenoid Valve
Removal / Installation

A. Removal

(1) Unplug table power cord from outlet.
(2) Remove motor cover assembly (Refer to

para 4.2).

(3) Remove two screws (1, Figure 4-5) and control

cover (2) from control panel (3).

6

9

5

4

B

3

Figure 4-5. Anti-cavitation Solenoid Valve

Removal / Installation

B. Installation

EQUIPMENT ALERT

Do not coat last two threads of

elbow and male connector with teflon tape
or sealant. Otherwise, little particles of the tape /
sealant can break loose and can contaminate
hydraulic system.

A

MA399800

(4) Loosen two terminal screws (A); then tag and

disconnect anti-cavitation solenoid valve wires
(4) from terminal block (5).

© Midmark Corporation 1997 SF-1548 Page 4-4 Printed in U.S.A.

(1) Coat threads of elbow (7) and male connector

(8) with pipe thread tape or sealant.

(2) Install elbow (7) and male connector (8) on anti-

Return To Table Of Contents

cavitation solenoid valve (10).
(3) Connect hose assembly (6) to elbow (7).
(4) Coat threads of male connector (8) with pipe

thread tape or sealant.

SECTION IV

MAINTENANCE / SERVICE

5

6

(5) Connect elbow (9) to male connector (8) and

secure by tightening jam nut (C).
(6) Feed two anti-cavitation solenoid valve wires

(4) thru wire hole (B).
(7) Connect two anti-cavitation solenoid valve

wires (4) to terminal block (5) and secure by

tightening two terminal screws (A).
(8) Install control cover (2) on control panel (3) and

secure with two screws (1).
(9) Install motor cover assembly (Refer to

para 4.2).

(10) Plug table power cord into outlet.

4.7 Up Functions Relief Valve Removal /
Installation

A. Removal

(1) If possible, raise BASE UP function all the

way up.

4

3

2

8

1

A

7

(2) Unplug table power cord from outlet.
(3) Remove motor cover assembly (Refer to

para 4.2).

(4) Remove four screws (1, Figure 4-6) and back

outer shroud (2) from left and right hand outer
shrouds (3).

Figure 4-6. Up Functions Relief Valve

Removal / Installation

B

MA399900

NOTE

NOTE

The back inner shroud must be removed if it will
obstruct removal of up functions relief valve.

(5) If necessary, remove eight screws (4) and back

inner shroud (5) from left and right hand inner
shrouds (6).

© Midmark Corporation 1997 SF-1548 Page 4-5 Printed in U.S.A.

Oil will flow out of relief valve port when up functions
relief valve is removed. Either have the new up
functions relief valve ready to install or place a drain
pan under relief valve port to catch oil.

(6) Remove up functions relief valve (7) from motor

pump (8).

SECTION IV

Return To Table Of Contents

MAINTENANCE / SERVICE

B. Installation

(1) Coat two o-rings (A) on up functions relief valve

(7) with mineral oil or vaseline.

EQUIPMENT ALERT

Make sure relief valve has "600" stamped

on its hex head (B); it
stamped "L2". Failure to install proper relief valve
will result in faulty table performance.

(2) Install up functions relief valve (7) in motor

pump (8).

(3) If removed, install back inner shroud (5) on left

and right inner shrouds (6) and secure with
eight screws (4).

(4) Install back outer shroud (2) on left and right

hand outer shrouds (3) and secure with four
screws (1).

(5) If necessary, add oil to motor pump (Refer to

para 4.3).

(6) Install motor cover assembly (Refer to

para 4.2).
(7) Plug table power cord into receptacle.
(8) Dispose of used oil in accordance with local

regulations.

must not

be

5

6

4

3

2

8

1

A

7

4.8 Down Functions Relief Valve Removal
/ Installation

B

A. Removal

(1) Unplug table power cord from outlet.
(2) Remove motor cover assembly (Refer to

para 4.2).

(3) Remove four screws (1, Figure 4-7) and back

outer shroud (2) from left and right hand outer
shrouds (3).

Figure 4-7. Down Functions Relief Valve

Removal / Installation

(4) If necessary, remove eight screws (4) and back

inner shroud (5) from left and right hand inner
shrouds (6).

NOTE

NOTE

The back inner shroud must be removed if it will
obstruct removal of up functions relief valve.

© Midmark Corporation 1997 SF-1548 Page 4-6 Printed in U.S.A.

Oil will flow out of relief valve port when down
functions relief valve is removed. Either have the
new down functions relief valve ready to install or
place a drain pan under relief valve port to catch oil.

MA400000

SECTION IV

Return To Table Of Contents

MAINTENANCE / SERVICE

(5) Remove down functions relief valve (7) from

motor pump (8).

B. Installation

(1) Coat two o-rings (A) on down functions relief

valve (7) with mineral oil or vaseline.

EQUIPMENT ALERT

Make sure relief valve has "L2" stamped

on its hex head (B); it
stamped "600". Failure to install proper relief valve
will result in faulty table performance.

(2) Install down functions relief valve (7) in motor

pump (8).

(3) If removed, install back inner shroud (5) on left

and right inner shrouds (6) and secure with
eight screws (4).

(4) Install back outer shroud (2) on left and right

hand outer shrouds (3) and secure with four
screws (1).

must not

be

(5) If necessary, add oil to motor pump (Refer to

para 4.3).
(6) Install motor cover (Refer to para 4.2).
(7) Plug table power cord into receptacle.
(8) Dispose of used oil in accordance with local

regulations.

4.9 Motor Pump Assembly - Complete
Removal / Installation

A. Removal

(1) Unplug table power cord from outlet.
(2) Remove motor cover (Refer to para 4.2).
(3) Remove four screws (1, Figure 4-8) and back

outer shroud (2) from left and right hand outer
shrouds (3).

3

5

10

16

4

6

13

2

11

1

8

12

14

15

A

Figure 4-8. Motor Pump Assembly - Complete Removal / Installation

© Midmark Corporation 1997 SF-1548 Page 4-7 Printed in U.S.A.

B

7 9

MA400100

SECTION IV

Return To Table Of Contents

MAINTENANCE / SERVICE

(4) Remove two screws (4) and control cover (5)

from control panel (6).

(5) Loosen three terminal screws; then tag and

disconnect three motor pump wires (7) from

terminal block (8).
(6) Pull motor pump wires (7) out thru wire hole.
(7) Loosen two terminal screws; then tag and

disconnect anti-cavitation solenoid valve wires

(9) from terminal block (8).
(8) Pull anti-cavitation solenoid valve wires (9) out

thru wire hole.
(9) Remove four nuts (10) from four motor

mounts (11).

(10) Disconnect hose assembly (12) from male

elbow (13).

(11) Place a drain pan under elbow (14).
(12) Disconnect hose assembly (15) from elbow

(14). Allow oil to drain into drain pan.

(13) Remove motor pump assembly (16) from four

motor mounts (11).

B. Installation

(1) Install motor pump assembly (16) on four motor

mounts (11) and secure with four nuts (10).
(2) Connect hose assembly (15) to elbow (14).
(3) Connect hose assembly (12) to male el-

bow (13).
(4) Feed two anti-cavitation solenoid valve wires

(9) thru wire hole.

(8) Install control cover (5) on control panel (6) and

secure with two screws (4).

(9) Install back outer shroud (2) on left and right

hand outer shrouds (3) and secure with four

screws (1).
(10) Add oil to motor pump (Refer to para 4.3).
(11) Install motor cover assembly (Refer to

para 4.2).
(12) Plug table power cord into outlet.
(13) Dispose of used oil in accordance with local

regulations.

4.10 Motor Pump Removal / Installation

A. Removal

(1) Unplug table power cord from outlet.
(2) Remove motor pump assembly - Complete

(Refer to para 4.9).

(3) Remove filler cap and drain any remaining oil

into drain pan (See Figure 4-9).

(4) Using a wrench to hold male connector (1,

Figure 4-9) stationary, loosen jam nut of elbow

(2). Disconnect male connector/anti-cavitation

solenoid valve from elbow.

(5) Remove down functions shuttle valve (3) and

up functions shuttle valve (4) from motor

pump (5).

(6) Remove two screws (6), lockwashers (7), and

motor base (8) from motor pump (5).

B. Installation

(5) Connect two anti-cavitation solenoid valve

wires (9) to terminal block (8) and secure by

tightening two terminal screws.
(6) Feed three motor pump wires (7) thru wire hole.
(7) Connect three motor pump wires (7) to terminal

block (8) and secure by tightening three

terminal screws.

© Midmark Corporation 1997 SF-1548 Page 4-8 Printed in U.S.A.

(1) Install motor base (8) on motor pump (5) and

secure with two lockwashers (7) and
screws (6).

(2) Install up functions shuttle valve (4) and down

functions shuttle valve (3) on motor pump (5).

(3) Coat threads of male connector (1) with pipe

thread tape or sealant.

SECTION IV

Return To Table Of Contents

MAINTENANCE / SERVICE

A

C

2

1

3

5

B

4

7

6

Figure 4-9. Motor Pump Removal / Installation

(4) Connect male connector (1)/anti-cavitation

solenoid valve to elbow (2) and secure by
tightening jam nut.

(6) Install motor pump assembly (Refer to

para 4.9).

(7) Plug table power cord into outlet.

4.11 Motor Shaft Seal Removal /
Installation

8

MA400200

NOTE

Reservoir will come off hard. Use a screwdriver to
pry reservoir off of manifold block, but make sure not
to damage o-ring.

(3) Remove four screws (1, Figure 4-10) and

reservoir (2) from manifold block (3).
(4) Remove magnet (4) from strainer (5).
(5) Remove four screws (6) and pump housing (7)

from manifold block (3).
(6) Remove pump gear (8) and woodruff key (9)

from shaft of rotor assembly (10).
(7) Remove four screws (11) and motor housing

(12) from manifold block (3).
(8) Push rotor assembly (10) inward toward

manifold block (3); then remove retaining ring

(13) from end of rotor assembly shaft.
(9) Remove rotor assembly (10) from manifold

block (3).

(10) Using a screwdriver, pry motor shaft seal (14)

out of manifold block (3).

B. Installation

(1) Clean all metal shavings off of all components.
(2) Coat motor shaft seal (14) with vaseline or

mineral oil.

EQUIPMENT ALERT

Do not allow motor shaft seal to become
cocked during installation or it will become

impossible to install without damaging it.

A. Removal

(1) Unplug table power cord from outlet.
(2) Remove motor pump (Refer to para 4.10).

© Midmark Corporation 1997 SF-1548 Page 4-9 Printed in U.S.A.

(3) Using a hammer and 3/4 inch socket, install

motor shaft seal (14) in manifold block (3).
(4) Slide shaft of rotor assembly (10) thru manifold

block (3) and secure in place by installing

retaining ring (13) on end of rotor assembly

shaft.

SECTION IV

Return To Table Of Contents

MAINTENANCE / SERVICE

12

10

11

B

3

14

6

A

2

4

13

7

5

1

8

9

MA400300

Figure 4-10. Motor Shaft Seal Removal / Installation

(5) Install motor housing (12) on manifold block (3)

and secure with four screws (11).

(6) Install woodruff key (9) and pump gear (8) on

shaft of rotor assembly (10).

(7) Install pump housing (7) on manifold block (3)

and secure with four screws (6).
(8) Install magnet (4) on strainer (5).
(9) Make sure o-ring )B) on manifold block is

present and clean. Coat o-ring with mineral oil.

NOTE

Strainer may get in way when reservoir is being
installed. If so, rotate strainer out of the way.

(10) Install reservoir (2) on manifold block (3) and

secure with four screws (1).
(11) Install motor pump (Refer to para 4.10).
(12) Plug table power cord into outlet.

© Midmark Corporation 1997 SF-1548 Page 4-10 Printed in U.S.A.

SECTION IV

8

7

9

Return To Table Of Contents

MAINTENANCE / SERVICE

4.12 Back Cylinder Removal / Installation

A. Removal

(1) Unplug table power cord from outlet.
(2) Remove upholstered seat section (Refer to

steps 6 thru 8 of para 4.32.

(3) Remove four screws (1, Figure 4-11) and front

outer shroud (2) from left and right hand outer
shrouds (3).

6

3

5

4

(6) Remove motor cover assembly (Refer to

para 4.2).

(7) Remove two screws (1, Figure 4-12) and

control cover (2) from control panel (3).

(8) Loosen two terminal screws; then tag and

disconnect back cylinder wires (4) from terminal

block (5).

2

1

3

5

B

A

1

2

MA400400

Figure 4-11. Table Access

(4) Remove eight screws (4) and front inner shroud

(5) Remove screw (7) and wire clip (8) securing

(5) from left and right hand inner shrouds (6).

wires and hoses to base weldment (9).

4

Figure 4-12. Back Cylinder Wires

Disconnection / Connection

(9) Pull back cylinder wires (4) out thru wire hole.

(10) Remove four screws (1, Figure 4-13) and back

cover (2) from back weldment (3).
(11) Cut two cable ties which are securing hose

assemblies (4 and 5) to back cylinder (6).
(12) While supporting back weldment (3), remove

four E-rings (7), two clevis pins (8), and partially

separate back cylinder (6) from cylinder

brackets (9). Fold back section over onto seat

section.
(13) Tag hose assemblies (4 and 5).
(14) Disconnect hose assembly (4) from back

cylinder (6).

MA400500

© Midmark Corporation 1997 SF-1548 Page 4-11 Printed in U.S.A.

SECTION IV

Return To Table Of Contents

MAINTENANCE / SERVICE

(15) Disconnect hose assembly (5) from back

cylinder (6).

(16) Cut necessary cable ties and remove back

cylinder (6) from table.

3

8

7

2

A

7

9

4

6

1

8

5

(4) Secure hose assemblies (4 and 5) to back

cylinder (6) with two cable ties.

(5) Route back cylinder wires (4, Figure 4-12) thru

table.

(6) Feed back cylinder wires (4) thru wire hole.
(7) Connect two back cylinder wires (4) to terminal

block (5) and secure by tightening two terminal

screws (A).

(8) Install control cover (2) on control panel (3) and

secure with two screws (1).

(9) Secure wires and hoses to base weldment (9,

Figure 4-11) with wire clip (8) and screw (7).

Install any cable ties removed during removal.
(10) Install front inner shroud (5) on left and right

hand outer shrouds (6) and secure with eight

screws (4).
(11) Install front outer shroud (2) on left and right

hand inner shrouds (3) and secure with four

screws (1).

B

7

C

MA400600

Figure 4-13. Back Cylinder Removal / Installation

B. Installation

NOTE

No sealant is required when connecting hose assem­blies. The back cylinder has an o-ring in each port
which seals the hose assemblies.

(1) Connect hose assembly (5, Figure 4-13) to

back cylinder (6).

(2) Connect hose assembly (4) to back cylin-

der (6).

(3) Install back cylinder (6) on cylinder brackets (9)

and secure with two clevis pins (8) through
clevis (A) with) four E-rings (7).

(12) Install upholstered seat section (Refer to step 6

of para 4.32).
(13) Plug table power cord into outlet.
(14) Lower BACK DOWN function all the way down.

EQUIPMENT ALERT

TILT DOWN function must be completely
lowered for following step. Failure to do

so will result in incorrect adjustment.

(15) If back section

BACK DOWN function is completely lowered,

perform steps 16 thru 18. If back section

level when the BACK DOWN function is

completely lowered, go to step 19.

is not

level with floor when the

is

EQUIPMENT ALERT

The cylinder rod must be partially ex -

tended before performing step 17. If the
cylinder rod is fully extended or retracted when step
17 is being performed, damage to seals will occurr.

© Midmark Corporation 1997 SF-1548 Page 4-12 Printed in U.S.A.

(16) Raise BACK UP function up until cylinder rod is

extended halfway.

SECTION IV

10

10

D

7

11

12

10

9

10

11

12

8

B

C

A

E

Return To Table Of Contents

MAINTENANCE / SERVICE

(17) Place a wrench on adjusting seats (B) of

cylinder rod (C) and use it to rotate cylinder rod
to adjust clevis up or down as necessary.

(18) Repeat steps 14 thru 17 until back section is

level when BACK DOWN function is completely
lowered.

(19) Install back cover (2) on back weldment (3) and

secure with four screws (1).

(20) If necessary, add oil to motor pump (Refer to

para 4.3).

(21) Install motor cover assembly (Refer to

para 4.2).

4.13 Tilt Cylinder Removal / Installation

A. Removal

(1) If possible, lower TILT DOWN function all the

way down.

(5) Remove two screws (1, Figure 4-15) and

control cover (2) from control panel (3).

(6) Loosen two terminal screws; then tag and

disconnect two tilt cylinder wires (4) from

terminal block (5).
(7) Pull tilt cylinder wires (4) out thru wire hole.
(8) Remove four screws (1, Figure 4-16) and front

outer shroud (2) from left and right hand outer

shrouds (3).

6

5

6

3

4

(2) Raise FOOT UP function all the way up.
(3) Unplug table power cord from outlet.
(4) Remove motor cover assembly (Refer to

para 4.2).

1

5

Figure 4-14. Tilt Cylinder Wire

Disconnection / Connection

4

3

1

2

2

3

B

A

MA400800

MA400700

Figure 4-15. Tilt Cylinder Removal / Installation

© Midmark Corporation 1997 SF-1548 Page 4-13 Printed in U.S.A.

SECTION IV

Return To Table Of Contents

MAINTENANCE / SERVICE

(9) Remove eight screws (4) and front inner shroud

(5) from left and right hand inner shrouds (6).

(10) Disconnect return manifold (7) from rod end of

tilt cylinder (8).

(11) Disconnect power manifold (9) from base of tilt

cylinder (8).

(12) Cut cable ties (A) which secure hose assem-

blies and wire harnesses to tilt cylinder (8).

WARNING

The foot end of table top must be

supported while removing tilt cylinder.
Failure to do will allow table top to fall which
could result in serious personal injury.

NOTE

Cut cable ties as necessary to remove tilt cylinder.

(13) While supporting foot end of table top, remove

four E-rings (10), two clevis pins (11), and tilt
cylinder (8) from brackets (12).

B. Installation

(1) Install tilt cylinder (8, Figure 4-15) on brackets

(12) and secure with two clevis pins (11) and
four E-rings (10).

WARNING

Make sure the safety cable (B) is

properly installed on the return and
power manifolds. Failure to do so could result in
serious personal injury to patient or table opera­tor.

(7) Connect two tilt cylinder wires (4) to terminal

block (5) and secure by tightening two terminal
screws (A).

(8) Install control cover (2) on control panel (3) and

secure with two screws (1).

(9) Install any cable ties which were removed.
(10) Plug table power cord into outlet.
(11) Lower TILT DOWN function all the way down.
(12) If seat section

TILT DOWN function is completely lowered,
perform steps 13 thru 15. If seat section is
level when the TILT DOWN function is com­pletely lowered, go to step 16.

is not

level with floor when the

EQUIPMENT ALERT

The cylinder rod (C) must be partially

extended before performing step 14. If
the cylinder rod is fully extended or retracted when
step 14 is being performed, damage to seals will
occurr.

(13) Raise TILT UP function up until cylinder rod is

extended halfway.

(14) Place a wrench on adjusting seats (D, Figure 4-

15) of cylinder rod (C) and use it to rotate
cylinder rod to adjust clevis (E) up or down as
necessary.

(15) Repeat steps 11 thru 15 until seat section is

level when TILT DOWN function is completely
lowered.

(2) Connect power manifold (9) to base of tilt

cylinder (8), making sure safety cable (B) is
properly installed.

(3) Connect return manifold (7) to rod end of tilt

cylinder (8).

(4) Secure wire harnesses and hose assemblies to

tilt cylinder (8) with a cable tie.

(5) Route tilt cylinder wires (4, Figure 4-14) thru

table.

(6) Feed tilt cylinder wires (4) thru wire hole (B) in

control panel (3).

© Midmark Corporation 1997 SF-1548 Page 4-14 Printed in U.S.A.

(16) Install front inner shroud (5) on left and right

hand inner shrouds (6) and secure with eight
screws (4).

(17) Install front outer shroud (2) on left and right

hand outer shrouds (3) and secure with four
screws (1).

(18) If necessary, add oil to motor pump (Refer to

para 4.3).

(19) Install motor cover assembly (Refer to

para 4.2).

SECTION IV

Return To Table Of Contents

MAINTENANCE / SERVICE

4.14 Base Cylinder Removal / Installation

A. Removal

(1) Unplug table power cord from outlet.
(2) Remove motor cover assembly (Refer to

para 4.2).

(3) Remove four screws (1, Figure 4-16) and back

outer shroud (2) from left and right hand outer
shrouds (3).

6

5

3

10

4

8

9

7

(5) Remove four screws (7) and brace (8) from

base slide assembly (9).
(6) Plug table power cord into outlet.
(7) If BASE DOWN function is operable, place a

block under middle slide of base slide assembly

(9). Then lower the BASE DOWN function until

the middle slide of the base slide assembly is

resting on block and pressure is off clevis pin

(10). If BASE DOWN function is not operable,

move table top to a horizontal position and

place supports under each end of table.
(8) Remove two screws (1, Figure 4-18) and

control cover (2) from control panel (3).

2

1

3

A

2

Figure 4-16. Base Cylinder Access

(4) Remove eight screws (4) and back inner

shroud (5) from left and right hand inner
shrouds (6).

NOTE

The motor pump and control panel can be carefully
pushed out of the way to allow a socket and ratchet
to be used on the bottom two screws (7).

1

MA400900

5

B

A

4

Figure 4-17. Base Cylinder Wires

Disconnection / Connection

(9) Loosen two terminal screws (A); then tag and

disconnect base cylinder wires (4) from termi-

nal block (5).

(10) Pull base cylinder wires (4) out thru wire

hole (B).

MA401000

© Midmark Corporation 1997 SF-1548 Page 4-15 Printed in U.S.A.

SECTION IV

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MAINTENANCE / SERVICE

DANGER

Make sure table top is properly

secured from lowering or tipping over
when base cylinder is disconnected from table
top. Clevis pin (2, Figure 4-18) should not have
any weight on it if table top is supported prop­erly. Failure to have table top properly secured
could result in serious personal injury or death.

(11) Remove hitch pin clip (1, Figure 4-18) and

clevis pin (2) from rod end (A) of base cylin­der (3).

6

2

A

7

1

3

B

(14) Disconnect hose assembly (7) from base

cylinder (3).

(15) Place rags under base tee (8).

NOTE

When base tee is disconnected from base cylinder,
oil will be free to flow out of the motor pump thru the
base tee. Either be ready to install the new base
cylinder or have drain pan and rags ready to catch
the oil.

(16) Disconnect base tee (8) from base cylinder (3).

Remove base cylinder from table.

B. Installation

(1) Position base cylinder (3, Figure 4-18) on table.
(2) Connect base tee (8) to base cylinder (3).
(3) Connect hose assembly (7) to base cylin-

der (3).

(4) Secure hose assembly (7) to base cylinder (3)

with two cable ties (B).

(5) Install base cylinder (3) on brackets (6) and

secure with clevis pins (2 and 5) and hitch pin
clips (1 and 4).

(6) Feed base cylinder wires (4, Figure 4-17) thru

wire hole (B).

6

8

5

Figure 4-18. Base Cylinder Removal / Installation

(12) Remove hitch pin clip (4), clevis pin (5), and

partially separate base cylinder (3) from
brackets (6).

(13) Cut two cable ties securing hose assembly (7)

to base cylinder (3).

© Midmark Corporation 1997 SF-1548 Page 4-16 Printed in U.S.A.

4

MA401100

(7) Connect two base cylinder wires (4) to terminal

block (5) and secure by tightening two terminal
screws (A).

(8) Install control cover (2) on control panel (3) and

secure with two screws (1).

(9) Plug table power cord into outlet.

(10) See Figure 4-16. Raise BASE UP function

slightly and remove block from under middle
slide of base slide assembly (9) or remove
supports from under table top.

(11) Lower BASE DOWN function all the way down.

SECTION IV

Return To Table Of Contents

MAINTENANCE / SERVICE

(12) See Figure 4-19. If there

inch (1.6 to 3.2 mm) gap between inner mem­ber weldment and top of middle slide when the
BASE DOWN function is completely lowered (it
especially important that the inner member
weldment does not come into contact with the
top of the middle slide), perform steps 13 thru

15. If gap is correct when the BASE DOWN
function is completely lowered, go to step 16.

is not

a 1/16 to 1/8

B

A

C

1

(13) Raise BASE UP function up until cylinder rod is

extended halfway.

(14) Place a wrench on adjusting seats of (D)

cylinder rod (E) and use it to rotate cylinder rod
to adjust clevis (F) up or down as necessary.

(15) Repeat steps 11 thru 15 until there is a 1/16 to

1/8 inch (1.6 to 3.2 mm) gap (A) between inner
member weldment (B) and middle slide (C) of
base slide assembly when the BASE DOWN
function is completely lowered.

(16) Install brace (8, Figure 4-16) on base slide

assembly (9) and secure with four screws (7).

(17) Install any cable ties (B) removed during

removal.

(18) Install back inner shroud (5) on left and right

hand inner shrouds (6) and secure with eight
screws (4).

(19) Install back outer shroud (2) on left and right

hand outer shrouds (3) and secure with four
screws (1).

(20) If necessary, add oil to motor pump (Refer to

para 4.3).

(21) Install motor cover assembly (Refer to

para 4.2).

F

4.15 Foot Cylinder Removal / Installation

E

Figure 4-19. Base Cylinder Clevis Adjustment

EQUIPMENT ALERT

The cylinder rod (E) must be partially

extended before performing step 14. If
the cylinder rod is fully extended or retracted when
step 14 is being performed, damage to seals will
occurr.

© Midmark Corporation 1997 SF-1548 Page 4-17 Printed in U.S.A.

D

MA401200

A. Removal

(1) If possible, raise FOOT UP function all the

way up.
(2) Unplug table power cord from outlet.
(3) Remove motor cover assembly (Refer to

para 4.2).
(4) Remove two screws (1, Figure 4-20) and

control cover (2) from control panel (3).
(5) Loosen two terminal screws (A); then tag and

disconnect two foot cylinder wires (4) from

terminal block (5).

SECTION IV

Return To Table Of Contents

MAINTENANCE / SERVICE

1

5

4

Figure 4-20. Foot Cylinder Wire

Disconnection / Connection

(6 ) Pull foot cylinder wires (4) out thru wire

hole (B).

B

A

MA401300

2

6

5

4

3

3

1

2

MA401400

Figure 4-21. Shrouds Removal / Installation

B. Installation

(1 ) Install foot cylinder (5, Figure 4-22) on brackets

(12) and secure with clevis pin (11), two E-rings
(10), clevis pin (9), and hitch pin clip (8).

(7 ) Remove four screws (1, Figure 4-21) and front

outer shroud (2) from left and right hand outer
shrouds (3).

(8 ) Remove eight screws (4) and front inner shroud

(5) from left and right hand inner shrouds (6).

(9 ) Cut cable ties (D) securing foot cylinder wire

harness (1, Figure 4-22).

(10) Remove screw (2) and wire clip (3) securing foot

cylinder wire harness (1) to seat weldment (4).

(11) Cut cable ties securing hose assemblies to foot

cylinder (5).

(12) Disconnect hose assembly (6) from foot

cylinder (5).

(13) Disconnect hose assembly (7) from foot

cylinder (5).

(14) Support foot section of table top and then

remove hitch pin clip (8), clevis pin (9), two E­rings (10), clevis pin (11), and foot cylinder (5)
from brackets (12).

(2 ) Connect hose assembly (7) to foot cylinder (5).
(3 ) Connect hose assembly (6) to foot cylinder (5).
(4 ) Secure hose assemblies (6 and 7) to foot

cylinder (5) with cable ties.

(5 ) Secure foot cylinder wire harness (1) to seat

weldment (4) with wire clip (3) and screw (2).

(6 ) Feed foot cylinder wires (4, Figure 4-20) thru

wire hole (B) in control panel (3).

(7 ) Connect two foot cylinder wires (4) to terminal

block (5) and secure with two terminal
screws (A).

(8 ) Install control cover (2) on control panel (3) and

secure with two screws (1).

(9 ) Plug table power cord into outlet.

(10) Raise FOOT UP function all the way up.

© Midmark Corporation 1997 SF-1548 Rev. 9/00 Page 4-18 Printed in U.S.A.

SECTION IV

Return To Table Of Contents

MAINTENANCE / SERVICE

(1 6) Install front inner shroud (5, Figure 4-22) on left

and right hand inner shrouds (6) and secure with

12

4

eight screws (4).

8

(1 7 ) Install front outer shroud (2) on left and right

hand outer shrouds (3) and secure with four

6

12

9

5

3

screws (1).

(1 8 ) If necessary, add oil to motor pump (Refer to

para 4.3).

C

2

B

A

10

D

7

10

Figure 4-22. Foot Cylinder Removal / Installation

(11) If foot section

when FOOT UP function is completely raised,
perform steps 12 thru 14. See Figure 4-22.
If foot section is level when the FOOT UP
function is completely raised, go to step 17.

EQUIPMENT ALERT

The cylinder rod (A) must be partially ex

-tended before performing step 13. If the
cylinder rod is fully extended or retracted when step
13 is being performed, damage to seals will occurr.

(12) Lower FOOT DOWN function down until cylinder

rod is extended halfway.

is not

level with seat section

11

1

MA401500

(1 9 ) Install motor cover assembly (Refer to

para 4.2).

(2 0) Plug table power cord into outlet.

4.16 Time Delay Relay Removal /
Installation

A. Removal

EQUIPMENT ALERT

A malfunctioning cylinder can cause Time

Delay Relay to fail. Before replacing, use a
jumper wire to bypass relay, then run all functions to
their limits.

(1 ) Unplug table power cord from outlet.

2

1

6

3

5

(13) Place a wrench on adjusting seats (B) of

cylinder rod and use it to rotate cylinder rod to
adjust clevis (C) up or down as necessary.

(14) Repeat steps 10 thru 14 until foot section is

level with seat section when FOOT UP function
is completely raised.

(15) Install any cable ties removed during removal.

© Midmark Corporation 1997 SF-1548 Rev. 9/00 Page 4-19 Printed in U.S.A.

4

8

7

MA401600

Figure 4-23. Time Delay Relay

Removal / Installation

SECTION IV

Return To Table Of Contents

MAINTENANCE / SERVICE

(2) Remove motor cover assembly (Refer to

para 4.2).

(3) Remove two screws (1, Figure 4-23) and

control cover (2) from control panel (3).

6

5

(4) Tag and disconnect two wires (4) from termi-

nals of time delay relay (5).

(5) Remove nut (6), screw (7), washer (8), and

time delay relay (5) from control panel (3).

B. Installation

(1) Install time delay relay (5) on control panel (3)

and secure with washer (8), screw (7), and
nut (6).

(2) Connect two wires (4) to terminals of time delay

relay (5).

(3) Install control cover (2) on control panel (3) and

secure with two screws (1).

(4) Install motor cover assembly (Refer to

para 4.2).

(5) Plug table power cord into outlet.

4.17 Capacitors Removal / Installation

12

3

14

B

4

1

2

C

13

11

A. Removal

(1) If possible, raise FOOT UP function all the

way up.
(2) Unplug table power cord from outlet.
(3) Remove four screws (1, Figure 4-24) and front

outer shroud (2) from left and right hand outer

shrouds (3).
(4) If necessary to gain access to capacitors,

remove eight screws (4) and front inner shroud

(5) from left and right hand inner shrouds (6).
(5) Cut cable tie (A) securing wires to capacitor (7).
(6) Using a screwdriver, pry tab (B) of capacitor

mounting bracket (8) upward and remove

capacitor (7) from capacitor mounting bracket.
(7) Remove capacitor cap (9) from capacitor (7).

8

15

B

9

10

A

7

CA401700

Figure 4-24. Capacitors Removal / Installation

WARNING

A capacitor contains stored electricity.

Never touch terminals of a capacitor,
even if power has been shut off or disconnected.
Always discharge capacitor before touching
capacitor terminals or wires. Failure to comply
with these instruction could result in serious
personal injury or death.

© Midmark Corporation 1997 SF-1548 Page 4-20 Printed in U.S.A.

SECTION IV

Return To Table Of Contents

MAINTENANCE / SERVICE

(8) Discharge capacitor (7).
(9) Disconnect wires (10 and 11) from terminals of

capacitor (7).

(10) Using a screwdriver, pry tab of capacitor

mounting bracket (12) upward and remove
capacitor (13) from capacitor mounting bracket.

(11) Remove capacitor cap (14) from capacitor (13).

WARNING

A capacitor contains stored electricity.

Never touch terminals of a capacitor,
even if power has been shut off or disconnected.
Always discharge capacitor before touching
capacitor terminals or wires. Failure to comply
with these instruction could result in serious
personal injury or death.

(12) Discharge capacitor (13).
(13) Disconnect wires (11 and 15) from terminals of

capacitor (13).

(8) If removed, install front inner shroud (5) on left

and right hand inner shrouds (6) and secure
with eight screws (4).

(9) Install front outer shroud (2) on left and right

hand outer shrouds (3) and secure with four
screws (1).

(10) Plug table power cord into outlet.

4.18 Pan Safety Limit Switch Removal /
Installation

A. Removal

NOTE

In most cases, if the pan safety limit switch is mal­functioning, the foot section cannot be moved.
However, the foot section must be able to be moved
in order to remove upholstered seat section so
access to the pan safety limit switch can be gained.
Steps 1 thru 3 must be performed if the foot function
will not move and is prohibiting the upholstered seat
section from being removed.

B. Installation

(1) Connect capacitor wires (11 and 15) to termi-

nals of capacitor (13).
(2) Install capacitor cap (14) on capacitor (13).
(3) Position bottom of capacitor (13) on capacitor

mounting bracket (12) and then push the top of

the capacitor in. Using a screwdriver, force tab

(B) of capacitor mounting bracket (12) down

over catch (C).
(4) Connect capacitor wires (10 and 11) to termi-

nals of capacitor (7).
(5) Install capacitor cap (9) on capacitor (7).
(6) Position bottom of capacitor (7) on capacitor

mounting bracket (8) and then push the top of

the capacitor in. Using a screwdriver, force tab

of capacitor mounting bracket (8) down over

catch.
(7) Install cable tie (A) to secure wire to capaci-

tor (7).

(1) Remove motor cover assembly (Refer to

para 4.2).

2

1

3

4

A

MA401800

Figure 4-25. Jumper Wire

Connection / Disconnection

© Midmark Corporation 1997 SF-1548 Page 4-21 Printed in U.S.A.

SECTION IV

Return To Table Of Contents

MAINTENANCE / SERVICE

(2) Remove two screws (1, Figure 4-25) and

control cover (2) from control panel (3).
(3) Use a jumper wire to connect between termi-

nals of terminal block (4) so pan safety limit

switch is bypassed by jumper wire. See

Figures 5-1 thru 5-2 to determine which termi-

nals to connect the jumper wire to.
(4) Remove upholstered seat section (Refer to

steps 6 of para 4.32.
(5) Disconnect wire harness (1, Figure 4-26) from

pan safety limit switch (2).

10

C

2

3

4

B

5

1

6

9

(6) Remove two screws (3), lockwashers (4),

washers (5), and pan safety limit switch (2)/
bracket (6) as an assembly from seat weld­ment (7).

(7) Remove two nuts (8), lockwashers (9), screws

(10), and pan safety limit switch (2) from
bracket (6).

B. Installation

(1) Install pan safety limit switch (2, Figure 4-26)

on bracket (6) and secure with two screws (10),
lockwashers (9), and two nuts (8).

(2) Install bracket (6) and pan safety limit switch (2)

as an assembly on seat weldment (7) and
secure with two washers (5), lockwashers (4),
and screws (3). Do not tighten screws fully.

(3) Push pan slide assembly (A) inward until it

"locks" into its fully stowed position.

(4) Slide bracket (6) toward rear panel of pan slide

assembly until trip arm (B) of pan safety limit
switch (2) is firmly tripped by pan slide assem­bly. Tighten two screws (3).

8

Figure 4-26. Pan Safety Limit Switch

Removal / Installation

7

MA401900

(5) Connect wire harness (1) to pan safety limit

switch (2).

(6) If installed, remove jumper wire (See Figure 4-

25) from terminals of terminal block (4).

(7) If removed, install control cover (2) on control

panel (3) and secure with two screws (1).

(8) If removed, install motor cover assembly (Refer

to para 4.2).

(9) Install upholstered seat section (Refer to steps

7 thru 9 of para 4.XX.

© Midmark Corporation 1997 SF-1548 Page 4-22 Printed in U.S.A.

SECTION IV

Return To Table Of Contents

MAINTENANCE / SERVICE

4.19 Chain Assembly Adjustment

A. Adjustment

(1) Raise BASE UP function all the way up.
(2) Unplug table power cord from outlet.
(3) Remove four screws (1, Figure 4-27) and front

outer shroud (2) from left and right hand outer

shrouds (3).

6

3

5

4

(4) Remove eight screws (4) and front inner shroud

(5) from left and right hand inner shrouds (6).

(5) Loosen four screws (7).

EQUIPMENT ALERT

Adjust chains so they are tight, yet

have a slight spring back. Also, adjust
chains so there is an equal amount of tension on
each chain. Failure to do so will result in chains
loosening earlier and uneven wear.

(6) Insert a pry bar or large screwdriver into

adjustment gap (A) and pry downward on idler
adjustment weldment (8) until chains (9) are
tight, but not drum tight. Tighten four
screws (7).

(7) Install front inner shroud (5) on left and right

hand inner shrouds (6) and secure with eight
screws (4).

(8) Install front outer shroud (2) on left and right

1

hand outer shrouds (3) and secure with four
screws (1).

2

7

9

9

8

A

Figure 4-27. Chain Assembly Adjustment

(9) Plug table power cord into outlet.

4.20 Base Slide Assembly Removal /
Installation

A. Removal

(1) If possible, raise BASE UP function all the

way up.

(2) Move the back, seat, and foot sections of the

table top to a horizontal position.

(3) Unplug table power cord from outlet.
(4) Remove motor cover assembly (Refer to

para 4.2).

(5) Remove four screws (1, Figure 4-28) and back

outer shroud (2) from left and right hand outer
shrouds (3).

MA402000

© Midmark Corporation 1997 SF-1548 Page 4-23 Printed in U.S.A.

SECTION IV

Return To Table Of Contents

MAINTENANCE / SERVICE

4

5

6

13

9

10

6

7

3

12

11

14

8

2

1

3

(6) Remove eight screws (4) and back inner

shroud (5) from left and right hand inner
shrouds (6).

(7) Remove four screws (7) and front outer shroud

(8) from left and right hand outer shrouds (3).

(8) Remove eight screws (9) and front inner shroud

(10) from left and right hand inner shrouds (6).

(9) Remove six screws (11), washers (12), and left

and right hand inner shrouds (6) from base
slide assembly (13).

© Midmark Corporation 1997 SF-1548 Page 4-24 Printed in U.S.A.

15

Figure 4-28. Shrouds Removal / Installation

(10) Remove six screws (14) and partially separate

left and right hand outer shrouds (3) from base
weldment (15).

WARNING

The supports must be capable of

holding up table top after table top is
disconnected from base slide assembly and the
base slide assembly is removed. Failure to
support table top properly could result in table
top falling out-of-control which could result in
serious personal injury or death.

MA402100

SECTION IV

Return To Table Of Contents

MAINTENANCE / SERVICE

(11) Place supports (A, See Figure 4-29) under foot

section (B) and back section (C) of table top,
making sure weight of table top (D) is being
supported by supports. If necessary, plug table
power cord into outlet and lower table top onto
supports. Unplug table power cord from outlet.

(12) Remove two E-rings (1, Figure 4-29), clevis pin

(2), and separate tilt cylinder (3) from
bracket (4).

(13) Loosen four setscrews (5). Remove two tilt

pivot pins (6) from base slide assembly (7).

WARNING

Make sure table top is properly sup-

ported for the following step. Table
top will rest only on supports after this step.
Also do not touch any wires inside of table when
power cord is plugged in. This could result in
electrical shock. Failure to comply with this
warning could result in serious personal injury or
death.

(14) Plug table power cord into outlet. Lower BASE

DOWN function all the way down. Unplug table
power cord from outlet.

NOTE

If necessary, remove four screws and brace (F) to
allow base slide assembly to be pulled over base
cylinder.

(20) With the help of an assistant, remove base

slide assembly (7) from base weldment (17).

B. Installation

(1) With the help of an assistant, install base slide

assembly (7, Figure 4-29) on base weldment
(17), making sure base cylinder (10) gets
inserted between brace and base slide assem­bly.

(2) Secure base slide assembly (7) on base

weldment (17) with eight screws (19).
(3) Connect spring (18) to base slide assembly (7).
(4) Install auto return bracket assembly (16) and

two capacitor mounting brackets (15) on base

slide assembly (7) and secure with one screw

(14), four screws (13), and five nuts (12).
(5) Install capacitors (F, [Refer to para 4.19]).

WARNING

Make sure base slide assembly is fully

retracted (collapsed) before discon­necting base cylinder. Failure to do so will result
in base slide assembly collapsing after base
cylinder is disconnected which could result in
serious personal injury.

(15) Remove hitch pin clip (8), clevis pin (9), and

separate rod of base cylinder (10) from

bracket (11).
(16) Remove capacitors (E, [Refer to para 4.19]).
(17) Remove four nuts (12), four screws (13), two

capacitor mounting brackets (14) from base

slide assembly (7).
(18) Disconnect spring (18) from base slide assem-

bly (7).
(19) Remove eight screws (19) from base slide

assembly (7).

(6) Install rod end (G) of base cylinder (10) on

bracket (11) and secure with clevis pin (9) and
hitch pin clip (8).

NOTE

Install beveled edge of tilt pivot pins first. The
beveled edge allows the tilt pivot pins to be started
more easily.

(7) Raise BASE UP function until base slide

assembly (7) is aligned with seat weldment
(20). Secure base slide assembly to seat
weldment with two tilt pivot pins (6).

(8) Secure tilt pivot pins (6) in place by tightening

four setscrews (5).

(9) Install base of tilt cylinder (3) on bracket (4) and

secure with clevis pin (2) and two E-rings (1).

(10) Remove supports (A) from under head section

(C) and foot section (B) of table top (D).

.

© Midmark Corporation 1997 SF-1548 Page 4-25 Printed in U.S.A.

SECTION IV

Return To Table Of Contents

MAINTENANCE / SERVICE

D

C

5

18

6

7

11

9

A

B

G

8

F

10

3

1

2

15

© Midmark Corporation 1997 SF-1548 Page 4-26 Printed in U.S.A.

4

7

1

12

14

Figure 4-29. Base Slide Assembly Removal / Installation

13

16

17

E

MA402200

SECTION IV

Return To Table Of Contents

MAINTENANCE / SERVICE

(11) Install left and right hand outer shrouds (3,

Figure 4-29) on base weldment (15) and secure

with six screws (14).
(12) Install left and right hand inner shrouds (6) on

base slide assembly (13) and secure with six

washers (12) and screws (11).
(13) Install front inner shroud (10) on left and right

hand inner shrouds (6) and secure with eight

screws (9).
(14) Install front outer shroud (8) on left and right

hand outer shrouds (3) and secure with four

screws (7).
(15) Install back inner shroud (5) on left and right

hand inner shrouds (6) and secure with eight

screws (4).
(16) Install back outer shroud (2) on left and right

hand outer shrouds (3) and secure with four

screws (1).
(17) Install motor cover assembly (Refer to

para 4.2).
(18) Plug table power cord into outlet.

4.21 Headrest Adjustment

A. Adjustment

(1) Unlock upper lock handle (See Figure 4-30).
(2) Loosen setscrew (1, Figure 4-30).
(3) Tighten adjusting screw (2) slightly; then lock

upper lock handle (A). Repeat this step until

axis 1 (B) and axis 2 (C) have the strongest

possible holding power, but operation of upper

lock handle is not too difficult.

1

4

3

2

A

C

B

D

E

MA402300

Figure 4-30. Headrest Adjustment

(4) Tighten setscrew (1).
(5) Unlock lower lock handle (D).
(6) Loosen setscrew (3).
(7) Tighten adjusting screw (4) slightly; then lock

lower lock handle (D). Repeat this step until
axis 3 (C) has the strongest possible holding
power, but operation of lower lock handle is not
too difficult.

(8) Tighten setscrew (3).

© Midmark Corporation 1997 SF-1548 Page 4-27 Printed in U.S.A.

SECTION IV

Return To Table Of Contents

MAINTENANCE / SERVICE

4.22 Headrest Handles Handle Stops
Adjustment

A. Adjustment

(1) Loosen nut (1, Figure 4-31).

2

1

A

3

B

Hold the lower lock handle in this position and
adjust stop screw (4) so the lower lock handle
will be forced to stop in this position each time it
is locked.

(6) Tighten nut (3).

4.23 Stirrup Assembly And Components
Removal / Installation

A. Removal

4

(1) Remove hole plug (1, Figure 4-32) from access

hole in seat weldment (2).

(2) Insert screwdriver in access hole and remove

screw (3) from stirrup assembly (4).

B

1

A

3

MA402400

Figure 4-31. Headrest Handles

Handle Stops Adjustment

(2) Push on upper lock handle until it reaches a

point where the upper lock handle wants to lock
itself by going over center; then allow upper
lock handle to go over center a few degrees.
Hold the upper lock handle in this position and
adjust stop screw (2) so the upper lock handle
will be forced to stop in this position each time it

is locked.
(3) Tighten nut (1).
(4) Loosen nut (3).
(5) Push on lower lock handle until it reaches a

point where the lower lock handle wants to lock

itself by going over center; then allow lower

lock handle to go over center a few degrees.

5

4

6

7

2

8

MA402500

Figure 4-32. Stirrup Assembly And Components

Removal / Installation

(3) Pull stirrup assembly (4) out of pivot boss (5).
(4) Remove pivot boss (5) and stirrup guide

bracket (6) from stirrup mount weldment (7).

(5) If damaged, remove stirrup index spring (8)

from stirrup guide bracket (6).

© Midmark Corporation 1997 SF-1548 Page 4-28 Printed in U.S.A.

B. Installation

Return To Table Of Contents

(1) If removed, install stirrup index spring (8) on

stirrup guide bracket (6).
(2) Install stirrup guide bracket (6) in stirrup mount

weldment (7) and secure with pivot boss (5).

SECTION IV

MAINTENANCE / SERVICE

6

10

7

9

8

5

4

(3) Slide stirrup assembly (4) thru slot in pivot boss

(5) and thru slot in stirrup guide bracket (6).
(4) Install screw (3) on stirrup assembly (4).
(5) Install hole plug (1) in access hole of seat

weldment (2).

4.24 Typical Foot Switch Removal /
Installation

A. Removal

WARNING

The foot control contains high voltage

(115 VAC) when the table power cord
is plugged in. Unplug table power cord before
disassembling foot control to prevent electrical
shock. Failure to do so could result in serious
personal injury or death.

(1) Unplug table power cord from outlet.
(2) Remove two screws (1, Figure 4-38) and

partially separate foot switch bracket (2) from
foot control casting (3).

(3) Remove screw (4), spacer (5), and pedal (6)

from foot switch bracket (2).

(4) Tag and disconnect four wires (7) from termi-

nals of foot switch (8).

(5) Remove two nuts (9), washers (10), screws

(11), and foot switch (8) from foot switch
bracket (2).

B

7

A

C

11

2

3

1

MA402600

Figure 4-38. Typical Foot Switch

Removal / Installation

(2) Connect four wires (7) to terminals of foot

switch (8).

(3) Ensure springs and spacers are in position and

have not fallen off.

(4) Install pedal (6) on foot switch bracket (2) and

secure with spacer (5) and screw (4), making
sure pedal is mounted on pivot spacer.

(5) Install foot switch bracket (2) on foot control

casting (3) and secure with two screws (1).

(6) Plug table power cord into outlet.

B. Installation

(1) Install foot switch (8) on foot switch bracket (2)

and secure with two screws (11), washers (10),
and nuts (9).

© Midmark Corporation 1997 SF-1548 Page 4-29 Printed in U.S.A.

SECTION IV

Return To Table Of Contents

MAINTENANCE / SERVICE

4.25 Brake Adjustment

A. Adjustment

(1) Raise TABLE UP function all the way up.
(2) Unplug table power cord from outlet.
(3) Remove four screws (1, Figure 4-34) and front

outer shroud (2) from left and right hand outer
shrouds (3).

2

3

(4) Move ROTATION LOCK / UNLOCK lever (A) to

UNLOCK (C).

(5) Loosen nut (4) fully.

EQUIPMENT ALERT

Try to rotate the table top after screw has

been backed off 1/2 turn. If brake is
dragging when table top is being rotated, loosen
screw (5) an additional 1/4 turn. Failure to do so will
result in brake dragging continuously.

(6) Tighten screw (5) handtight; then back screw

1

off 1/2 turn.

(7) Tighten nut (4), making sure screw (5) does not

move.

(8) Move ROTATION LOCK / UNLOCK lever (A) to

LOCK position (B) and try to rotate table top to
check brake function. Then move ROTATION
LOCK / UNLOCK lever to UNLOCK position (C)
and try to rotate table top to check brake
function. If brake does not hold table top from
rotating when ROTATION LOCK lever is in
LOCK position, tighten turnbuckle as described
in step 9. If brake drags when ROTATION
LOCK lever is in UNLOCK position, loosen
turnbuckle as described in step 9.

(9) Loosen nut (6). Turn turnbuckle (7) in direction

shown to tighten or loosen turnbuckle. Repeat
steps 8 and 9 until table top will not rotate when
ROTATION LOCK lever is in LOCK position,

5

4

A

D

6

E

7

C

Figure 4-34. Brake Adjustment

B

MA402900

but brake does not drag when ROTATION
LOCK lever is in UNLOCK position.

(10) Tighten nut (6), making sure turnbuckle (7)

does not turn.

(11) Install front outer shroud (2) on left and right

hand outer shrouds (3) and secure with four
screws (1).

© Midmark Corporation 1997 SF-1548 Page 4-30 Printed in U.S.A.

SECTION IV

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MAINTENANCE / SERVICE

4.26 Brake Removal / Installation

A. Removal

(1) Raise TABLE UP function all the way up.
(2) Unplug table power cord from outlet.
(3) Remove four screws (1, Figure 4-35) and front

outer shroud (2) from left and right hand outer
shrouds (3).

2

(4) Loosen nut (4).
(5) Unscrew rod end (5) from brake lever of

brake (6).

(6) Remove two screws (7). Then remove brake

(6) and bracket (8) as an assembly from
platform base weldment (9).

(7) Remove brake (6) from bracket (8).

B. Installation

1

(1) Install brake (6) on bracket (8).

NOTE

Use a screwdriver to hold brake pads apart, so brake
may be installed.

(2) Install bracket (8) and brake (6) as an assembly

on platform base weldment (9) and secure with
two screws (7). If brake cannot be installed
because brake pads cannot be spread far
enough apart, loosen nut (10) and unscrew
screw (11) until brake pads are far enough
apart to allow brake to be installed.

A

(3) Screw rod end (5) onto brake lever of

3

7

4

11

10

6

8

4.27 Rotation Bearings Removal / Instal-

brake (6).
(4) Tighten nut (4).
(5) Adjust brake (Refer to para 4.29).
(6) Install front outer shroud (2) on left and right

hand outer shrouds (3) and secure with four

screws (1).

lation

5

9

MA403000

A. Removal

(1) Raise TABLE UP function all the way up.
(2) Unplug table power cord from outlet.
(3) Remove motor cover assembly (Refer to

para 4.2).

Figure 4-35. Brake Removal / Installation

© Midmark Corporation 1997 SF-1548 Page 4-31 Printed in U.S.A.

SECTION IV

8

9

A

Return To Table Of Contents

MAINTENANCE / SERVICE

(4) Remove four screws (1, Figure 4-36) and front

outer shroud (2) from left and right hand outer
shrouds (3).

(5) Remove four screws (4) and back outer shroud

(5) from left and right hand outer shrouds (3).

2

3

1

6

6

7

5

4

3

(10) Remove two screws (1, Figure 4-37) and

control cover (2) from control panel (3).

7

9

8

4 & 6

10

Figure 4-36. Shrouds Removal / Installation

(6) Remove six screws (6) and left and right hand

outer shrouds (3) from platform base weld-

ment (7).
(7) Remove brake (Refer to para 4.29).
(8) Remove filler cap (8) from motor pump (9).
(9) Install plug (provided in bearing replacement

kit) on motor pump (9).

MA403100

1

2

3

5

B

A

4 & 6

C

MA403200

Figure 4-37. Wires Disconnection / Connection

(11) Loosen three terminal screws; then tag and

disconnect three wires (4) from terminal
block (5).

NOTE

Cut cable ties as necessary during the following
steps.

© Midmark Corporation 1997 SF-1548 Page 4-32 Printed in U.S.A.

SECTION IV

Return To Table Of Contents

MAINTENANCE / SERVICE

(12) Loosen eight terminal screws; then tag and

disconnect eight wires (6) from terminal
blocks (5).

(13) Remove screw (7), washer (8), and cable clamp

(9) securing wires (4 and 6) to platform base
weldment (10).

WARNING

The table is very heavy. Use proper

lifting techniques to prevent back
strain. Use a block or jackstand strong enough to
support base of table. Make sure base of table is
supported securely so it will not fall while being
worked on. Failure to do so could result in
serious personal injury.

(14) With help of an assistant, lay table onto its left

(patients left) side and block base of table off of
floor by putting a block/jackstand under base
slide assembly. See Figure 4-38.

(15) Remove eight screws (1, Figure 4-38) and cable

cover (2) from rotational base (3).

(16) Pull wire harnesses (4 and 5) out thru bottom of

platform base weldment (6).

(17) Remove retaining ring (7) from platform base

weldment (6).

(18) Using spanner socket, remove rotation nut (8)

from platform base weldment (6). Refer to
Table 1-2 for special tool.

WARNING

Platform base weldment weighs

approximately 100 lbs (45 kg). If
necessary, use an assistant to help in removing
platform base weldment. Use proper lifting
techniques to prevent back strain. Failure to do
so could result in serious personal injury.

(19) Remove rotational base (3), thin bearing

washer (9), thrust bearing (10), and thick
bearing washer (11) from platform base
weldment (6).

6

A

5

Figure 4-38. Rotational Base Removal / Installation

3

2

B

4

10

8

7

11

9

1

MA403300

© Midmark Corporation 1997 SF-1548 Page 4-33 Printed in U.S.A.

SECTION IV

Return To Table Of Contents

MAINTENANCE / SERVICE

(20) Remove two screws (1, Figure 4-39).
(21) Remove table rotation bearing (2) and rotation

stop plate (3) from rotational base (4), by
pulling table rotation bearing straight up and off
of two groove pins (5).

(22) If damaged, remove stop plate post (6) from

rotational base (4).

(23) If damaged, remove four screws (7) and stop

disc (8) from rotational base (4).

(24) If damaged, use vise grips to remove two

groove pins (5) from rotational base (4). Drill
groove pins out if necessary.

2

1

3

8

7

(4) Coat bearings of table rotation bearing (2) with

high temperature grease.

NOTE

Table rotation bearing can only be installed one way.
Look at screw hole locations to properly line up table
rotation bearing. Groove pins assist in helping to
align bearing.

(5) Install table rotation bearing (2) and rotation

stop plate (3) on rotational base (4), making
sure stop plate post (6) goes thru rotation stop
plate to hold rotation stop plate in position.

(6) Coat threads of two screws (1) with removeable

threadlocking adhesive (Loctite 242).

(7) Secure table rotation bearing (2) with two

screws (1).

(8) Coat mating surfaces of thick bearing washer

(11, Figure 4-38), thrust bearing (10) and thin
bearing washer (9) with high temperature
grease.

5

4

Figure 4-44. Table Rotation Bearing

Removal / Installation

B. Installation

(1) If removed, install groove pins (5, Figure 4-39)

in rotational base (4).

(2) If removed, install stop disc (8) on rotational

base (4) and secure with four screws (7).

(3) If removed, coat threads of stop plate post (6)

with removeable threadlocking adhesive
(Loctite 242) Install stop plate post (6) in
rotational base (4).

6

MA403700

(9) Coat threads of rotation nut (8) with removeable

threadlocking adhesive (Loctite 242).

WARNING

Platform base weldment weighs

approximately 100 lbs (45 kg). If
necessary, use an assistant to help in removing
platform base weldment. Use proper lifting
techniques to prevent back strain. Failure to do
so could result in serious personal injury.

(10) Install rotational base (3) on platform base

weldment (6) and secure with thick bearing
washer (11), thrust bearing (10), thin bearing
washer (9), and rotation nut (8). Use spanner
socket to torque rotation nut to 20 ft-lbs (27
n•m). Refer to Table 1-2 for special tool.

(11) Install retaining ring (7) on platform base

weldment (6).

(12) Feed wire harnesses (4 and 5) thru center of

platform base weldment (6).

(13) Install cable cover (2) on rotational base (3)

and secure with eight screws (1).

© Midmark Corporation 1997 SF-1548 Page 4-34 Printed in U.S.A.

WARNING

Return To Table Of Contents

The table is very heavy. Use proper

lifting techniques to prevent back
strain. Failure to do so could result in serious
personal injury.

(14) With help of an assistant, raise table to its

upright position.

(15) Connect eight wires (6, Figure 4-37) to terminal

block (5) and secure by tightening eight termi­nal screws.

(16) Connect three wires (4) to terminal block (5)

and secure by tightening three terminal screws.

(17) Secure wires (4 and 6) to platform base

weldment (10) with cable clamp (9), washer (8),
and screw (7).

SECTION IV

MAINTENANCE / SERVICE

4.28 Upholstery Removal / Installation

A. Removal

(1) Move table top to flat position.

Upholstered Headrest Assembly Removal

(2) Unlock (A) three locking tabs (1, Figure 4-34)

by pulling on locking tabs until locking tabs are
free of three studs (2).

(3) Remove upholstered headrest assembly (3)

from headboard pivot mount (4) by pulling
upholstered headrest assembly straight off.

Upholstered Back Section Removal

NOTE

Locking tabs are in paper roll holder cavity.

(18) Install any cable ties which were removed

during removal.

(19) Install control cover (2) on control panel (3) and

secure with two screws (1).

(20) Remove plug from motor pump (9, Fig-

ure 4-36).
(21) Install filler cap (8) in motor pump (9).
(22) Install brake (Refer to para 4.30).
(23) Adjust brake (Refer to para 4.29).
(24) Install left and right hand outer shrouds (3,

Figure 4-36) on platform base weldment (7) and

secure with six screws (6).
(25) Install back outer shroud (5) on left and right

hand outer shrouds (3) and secure with four

screws (4).
(26) Install front outer shroud (2) on left and right

hand outer shrouds (3) and secure with four

screws (1).

(4) Unlock (A) two locking tabs (5) by pulling on

locking tabs until locking tabs are free of
studs (6).

(5) On a two piece seat & back upholstery set,

raise upward on head end of upholstered back
section (7), approximately 1" (2.54 cm), until
two studs (6) are free of back weldment (8);
then slide upholstered back section approxi­mately 1 in. (2.5 cm) toward head end of table
until stud (9) is in rounded part of locking slot
(C). Lift upholstered back section (7) straight
up and remove from back weldment (8).

NOTE

The upholstery may be difficult to raise up because
there is a velcro strip (*) holding the upholstered
back down.

On a one piece seat & back upholstery set,
raise upward on upholstered back section (7)
until two studs (6) are free of back weldment
(8); then swing upholstered back section (7)
upward so that it rests against upholstered seat
section (12).

(27) Install motor cover assembly (Refer to

para 4.2).

© Midmark Corporation 1997 SF-1548 Page 4-35 Printed in U.S.A.

SECTION IV

Return To Table Of Contents

MAINTENANCE / SERVICE

2

4

9

6

A

B

7

1"

5

1

3

1"

8

C

*

11

14

12

10

23

G

24

F

18

21

E

20

19

22

D

13

16

17

18

15

© Midmark Corporation 1997 SF-1548 Page 4-36 Printed in U.S.A.

MA402700

Figure 4-40. Upholstery Removal / Installation

SECTION IV

Return To Table Of Contents

MAINTENANCE / SERVICE

Upholstered Seat Section Removal

(6) Lower FOOT DOWN function all the way down.
(7) Unlock (A) two locking tabs (10) by pulling on

locking tabs until locking tabs are free of

studs (11).

(8) Raise upward on foot end of upholstered seat

section (12), approximately 1" (2.54 cm), until

two studs (11) are free of seat weldment (13);

then slide upholstered seat section approxi-

mately 1 in. (2.5 cm) toward foot end of table

until two studs (14) are in rounded part of

locking slots (D). Lift upholstered seat section

(12) straight up and remove from seat weld-

ment (13).

Upholstered Leg Rest Removal

(9) Raise FOOT UP function all the way up.

(10) Unlock (A) two locking tabs (15) by pulling on

locking tabs until locking tabs are free of

studs (16).
(11) Remove upholstered leg rest (17) from foot

extension weldment (18) by pulling straight up.

B. Installation
Side Panel Insert Installation

(1) Insert one end of side panel insert (23) into one

of the panel slots (G) on side panel (24). Flex
side panel insert in the middle and then insert
free end of side panel insert into remaining
panel slot (G) on other end of side panel. Work
side panel insert into proper position.

Upholstered Foot Rest Installation

(2) Install upholstered foot rest (22) on foot board

assembly (19) and secure by locking three
locking tabs (20) onto three studs (21).

(3) Install foot board assembly (19) on foot exten-

sion weldment (18), making sure it locks into
place.

Upholstered Leg Rest Installation

(4) Install upholstered leg rest (17) on foot exten-

sion weldment (18) and secure by locking (B)
two locking tabs (15) onto two studs (16).

(5) Lower FOOT DOWN function all the way down.

Upholstered Foot Rest Removal

(12) Squeeze release latches (E) and remove foot

board assembly (19) from foot extension

weldment (18).
(13) Unlock (A) three locking tabs (20) by pulling on

locking tabs until locking tabs are free of three

studs (21).
(14) Remove upholstered foot rest (22) from foot

board assembly (19) by pulling straight up.

Side Panel Insert Removal

(15) Using an index finger, reach thru access hole

(F) and push outward on side panel insert (23)

until bottom edge of side panel insert can be

grasped by the other hand. Pull outward on

bottom of side panel insert until it "pops" off of

side panel (24).

Upholstered Seat Section Installation

DANGER

At completion of following step, ensure

that upholstered seat section is secure by
lifting up on its edges. Failure to secure upholstered
seat section properly could result in serious injury to
patient.

(6) Install head end of upholstered seat section

(12) on seat weldment (13),

studs (14) are inserted in rounded part of
locking slots (D)

section (12) toward head end of table until two
studs (11) fit thru stud holes in seat weldment
(13). Secure upholstered seat section (12) in
place by locking two locking tabs (10) onto two
studs (11).

; then slide upholstered seat

making sure two

© Midmark Corporation 1997 SF-1548 Page 4-37 Printed in U.S.A.

SECTION IV

Return To Table Of Contents

MAINTENANCE / SERVICE

Upholstered Back Section Installation

DANGER

At completion of following step, ensure

that upholstered back section is secure by
lifting up on its edges. Failure to secure upholstered
back section properly could result in serious injury to
patient.

NOTE

Locking tabs are in paper roll holder cavity.

(7) On a two piece seat & back upholstery set,

install foot end of upholstered back section (7)
on back weldment (8),

making sure stud (9) is

inserted in rounded part of locking slot (C);

slide upholstered back section (7) toward foot
end of table until two studs (6) fit thru stud holes
in back weldment (8). Secure upholstered back
section (7) in place by locking (B) two locking
tabs (5) onto two studs (6).

NOTE

On a one piece seat & back upholstery set, a strip of
velcro (*) is used instead of a stud (9) and locking slot
(C). If installing upholstered seat section for the first
time, the backing from the velcro strip must be
removed and it must be firmly applied to the back
weldment (8).

On a one piece seat & back upholstery set,
lower upholstered back section (7) down onto
back weldment (8),

are inserted in two stud holes in back weldment.

Secure upholstered back section (C) in place by
locking two locking tabs (5) onto two studs (6).

Upholstered Headrest Assembly Installation

(8) Install upholstered headrest assembly (3) on

headboard pivot mount (4) and secure by locking
three locking tabs (1) onto three studs (2). (5)
Lower FOOT DOWN function all the way down.

making sure two studs (6)

then

4.29 Hydraulic System Flushing Proce­dure

NOTE

The following procedure is recommended for the
following reasons:

• The hydraulic system is excessively contami­nated with dirt particles or water, causing
repeated malfunctions of hydraulic compo­nents.

• An oil other than light weight mineral oil has
been added to the hydraulic system, causing the
table to malfunction or perform erratically.

A. Flushing Procedure

(1) Lower TABLE DOWN

DOWN
down.

(2) Remove motor cover assembly (Refer to

para 4.2).

(3) Remove filler cap (1, Figure 4-46) from reser-

voir (2).

(4) Get a suitable drain pan with a capacity of

approximately 2 quarts (1.9 liters).

(5) Using a syringe or suction device, remove all oil

from the reservoir (2).
(6) Refill reservoir (2) with light grade mineral oil.
(7) Disconnect hose (A) from down functions

shuttle valve (3) and place end of hose in drain

pan.
(8) Raise TABLE UP

FOOT UP functions all the way up, while

making sure to keep refilling reservoir (2) with

light grade mineral oil as necessary.
(9) Connect hose (A) to down functions shuttle

valve (3).

, ,

, and FOOT DOWN functions all the way

, ,

, ,

, BACK DOWN

, ,

, ,

, BACK UP

, ,

, ,

, TILT UP

, ,

, ,

, TILT

, ,

, ,

, and

, ,

© Midmark Corporation 1997 SF-1548 Page 4-38 Printed in U.S.A.

(10) Disconnect hose (B) from up functions shuttle

valve (4) and place end of hose in drain pan.

SECTION IV

Return To Table Of Contents

MAINTENANCE / SERVICE

1

2

3

A

C

Figure 4-46. Hydraulic System Flushing Procedure

(11) Lower TABLE DOWN

DOWN
down, while making sure to keep refilling
reservoir (2) with light grade mineral oil as
necessary.

, ,

, and FOOT DOWN functions all the way

, ,

, ,

, BACK DOWN

, ,

, ,

, TILT

, ,

2

4

B

C

(15) Lower all functions; then check oil level and add

or remove oil as necessary (Refer to para 4.3).

(16) Install motor cover assembly (Refer to

para 4.2).

MA402800

(12) Connect hose (B) to up functions shuttle

valve (4).

(13) Repeat steps 7 thru 12 until oil being removed

is clear and contains no dirt particles.

(14) Run all the functions up and down until all air is

purged from the hydraulic system.

© Midmark Corporation 1997 SF-1548 Page 4-39 Printed in U.S.A.

(17) Dispose of used oil in accordance with local

regulations.

SECTION IV

Return To Table Of Contents

MAINTENANCE / SERVICE

© Midmark Corporation 1997 SF-1548 Page 4-40 Printed in U.S.A.

SCHEMATICS AND DIAGRAMS

Return To Table Of Contents

SECTION V

SCHEMATICS AND DIAGRAMS

SECTION V

5.1 Electrical Schematics / Wiring
Diagrams

Figures 5-1 thru 5-2 illustrate the logic/current flow and

WHITE / BLACK

ANTI-CAVITATION

SOLENOID VALVE

BLACK

BLACK

TIME DELAY RELAY

2

1

WHITE

WHITE

R.H.

L.H.

RECEPTACLES

(2.5 AMPS MAX. EACH)

BLACK (115 VAC)
GREEN / YELLOW

WHITE (NEUTRAL)

120 V.A.C. 12 AMPS

60 HZ.

TERMINAL

BLOCK

BLACK

1 2 3 4 5 6 7 8 9 10 11

GREEN / YELLOW

WHITE

wiring connections between the electrical components
in the table. Record serial number of table being
worked on in order to determine which electrical
schematic or wiring diagram to use.

WHITE / BLACK

WHITE / BLACK

CAPACITORS

(124 - 149 MFD 250 VAC)

WHITE

N.O.

4

FOOT DOWN

1
3

FOOT UP

2
4

TILT DOWN

1
3

TILT UP

2
4

BACK DOWN

1
3

BACK UP

2
4

TABLE DOWN

1
3

TABLE UP

3

2
4

1
3

2
4

1
3

2
4

1
3

2
4

12

BLACK

RED / BLACK

ORANGE

WHITE / BLACK

WHITE

RED

BLUE

GREEN (GROUND)

BLACK

COM.

PAN SAFETY

LIMIT SWITCH

FOOTSWITCH ASSEMBLY

(NOTE: IF AN UP FOOT SWITCH & DOWN

FOOT SWITCH ARE ENERGIZED AT THE SAME

TIME, THE CIRCUIT BECOMES INOPERATIVE)

T1

MOTOR

PUMP

T2

INTERNAL VIEW OF FOOT SWITCHES

4

3
2

FOOT SWITCH

IN OFF

POSITION

© Midmark Corporation 1997 SF-1548 Page 5-1 Printed in U.S.A.

1

3
2

FOOT SWITCH

IN ON

POSITION

YELLOW

BLUE

REDT3

4
1

WHITE

WHITE

WHITE

Figure 5-1. Wiring Diagram

BLACK

FOOT CYLINDER

BLACK

TILT CYLINDER

BLACK

BACK CYLINDER

BLACK

BASE CYLINDER

MA404700

SECTION V

Return To Table Of Contents

SCHEMATICS AND DIAGRAMS

120 V.A.C. 12 AMPS

60 HZ.

GREEN / YELLOW

WHITE

BLACK

RED

BLACK

RECEPTACLE

RED

FOOT SWITCHES

FOOT DOWN

4

1

FOOT UP

3

BLACK

2

BLACK

TILT DOWN

4

WHITE

3
2

RED / BLACK

4

3

ANTI-CAVITATION

SOLENOID VALVE

T2

M

T3

MOTOR

PUMP

FOOT

T1

BLACK

BLUE

CAPACITORS

PAN SAFETY

LIMIT SWITCH

COM. N.O.

BLACK

CYLINDER

SOLENOID

1

TILT

VALVE

CYLINDER
SOLENOID

WHITE

VALVE

BLACK

BLACK

1

TILT UP

3

BLACK

2

BLACK

2

ORANGE

BLUE

4

1

BACK DOWN

RED

RED

4

1

BACK UP

3

BLACK

2

BLACK

TABLE DOWN

4

1

TABLE UP

3

BLACK

2

BLACK

3
2

WHITE / BLACK

4

1

3
2

4

1

BLACK

BLUE

WHITE

WHITE

BLUE

Figure 5-2. Electrical Schematic

TIME
DELAY
RELAY

BACK
CYLINDER
SOLENOID

VALVE

WHITE

BASE
CYLINDER
SOLENOID

VALVE

MA404800

© Midmark Corporation 1997 SF-1548 Page 5-2 Printed in U.S.A.

SECTION V

Return To Table Of Contents

SCHEMATICS AND DIAGRAMS

5.2 Hydraulic Flow Diagrams

Figure 5-3 illustrates the hydraulic oil flow through the

UP FUNCTIONS HYDRAULIC OIL FLOW

CYLINDER

ROD

BASE
CYLINDER
SOLENOID

VALVE

(OPEN)

CYLINDER

ROD

TILT

CYLINDER

SOLENOID

VALVE

(CLOSED)

table when an up function is selected. Figure 5-16
illustrates the hydraulic oil flow through the table when a
down function is selected.

CYLINDER

ROD

BACK

CYLINDER

SOLENOID

VALVE

(CLOSED)

CYLINDER

ROD

FOOT
CYLINDER
SOLENOID

VALVE

(CLOSED)

ANTI-CAVITATION

SOLENOID VALVE

(OPEN)

RESERVOIR

RESERVOIR

CHECK VALVE

SUCTION
PRESSURE
RETURN

PORT

(OPEN)

(OPEN)

DOWN FUNCTIONS

SHUTTLE VALVE

(CLOSED)

DOWN FUNCTIONS

RELIEF VALVE

(CLOSED)

CHECK

BALL

SHUTTLE

PUMP

GEARS

FILTER

UP FUNCTIONS

SHUTTLE VALVE

(OPEN)

UP FUNCTIONS

RELIEF VALVE

(CLOSED)

CHECK

BALL

RESERVOIR

PORT

(CLOSED)

RESERVOIR

CHECK VALVE

(CLOSED)

RESERVOIR

MA2253

© Midmark Corporation 1997 SF-1548 Page 5-3 Printed in U.S.A.

Figure 5-3. Up Functions Hydraulic Flow Diagram

SECTION V

Return To Table Of Contents

SCHEMATICS AND DIAGRAMS

DOWN FUNCTIONS HYDRAULIC OIL FLOW

CYLINDER

ROD

BASE
CYLINDER
SOLENOID

VALVE

(OPEN)

ANTI-CAVITATION

SOLENOID VALVE

(OPEN)

CYLINDER

ROD

TILT
CYLINDER
SOLENOID

VALVE

(CLOSED)

DOWN FUNCTIONS

SHUTTLE VALVE

(OPEN)

CYLINDER

ROD

BACK
CYLINDER
SOLENOID

VALVE

(CLOSED)

CHECK

BALL

CYLINDER

ROD

FOOT
CYLINDER
SOLENOID

VALVE

(CLOSED)

UP FUNCTIONS

SHUTTLE VALVE

(CLOSED)

CHECK

BALL

SUCTION
PRESSURE
RETURN

SHUTTLE

PUMP

GEARS

RESERVOIR

PORT

(CLOSED)

RESERVOIR

CHECK VALVE

(CLOSED)

DOWN FUNCTIONS

RELIEF VALVE

(CLOSED)

FILTER

Figure 5-4. Down Functions Hydraulic Flow Diagram

UP FUNCTIONS

RELIEF VALVE

(CLOSED)

RESERVOIR

PORT

(OPEN)

RESERVOIR

CHECK VALVE

(OPEN)

RESERVOIR

MA2252

© Midmark Corporation 1997 SF-1548 Page 5-4 Printed in U.S.A.

SECTION VI

Return To Table Of Contents

PARTS LIST

6.1 Introduction

The illustrated parts list provides information for identify­ing and ordering the parts necessary to maintain the unit
in peak operating condition. Refer to paragraph 1.5 for
parts ordering information.

The parts list also illustrates disassembly and assembly
relationships of parts.

6.2 Description of Columns

The

Item

column of the parts list gives a component its
own unique number. The same number is given to the
component in the parts illustration. This allows a part
number of a component to be found if the technician can
visually spot the part on the illustration. The technician
simply finds the component in question on the illustra­tion and notes the item number of that component.
Then, he finds that item number in the parts list. The
row corresponding to the item number gives the techni­cian the part number, a description of the component,
and quantity of parts per subassembly. Also, if a part
number is known, the location of that component can be
determined by looking for the item number of the
component on the illustration.

SECTION VI

PARTS LIST

The

Qty.

column lists the number of units of a particular
component that is required for the subassembly. The
letters “AR” denote “as required” when quantities of a
particular component cannot be determined, such as:
adhesive.

Bullets { • } in the
column show the indenture level of a component. If a
component does not have a bullet, it is a main compo­nent of that illustration. If a component has a bullet, it is
a subcomponent of the next component listed higher in
the parts list than itself that does not have a bullet.
Likewise, if a component has two bullets, it is a sub­component of the next component listed higher in the
parts list than itself that has only one bullet.

Part No.

column and the

Description

6.3 Torque Specifications and Important

Assembly Notes

When specific assembly torque specifications, measure­ments, or procedures have been identified, by our
engineering department, as required to assure proper
function of the unit, those torque specifications mea­surements, and procedures will be noted on the parts
illustrations. Adherence to these requirements is
essential.

The

Part No.

that component.
The

Description

of the component.

column lists the MIDMARK part number for

column provides a physical description

© Midmark Corporation 1997 SF1548 Page 6-1 Printed in U.S.A.

Pictorial Index

Return To Table Of Contents

7

1

SECTION VI

PARTS LIST

5

4

3

2

8

9

16

17

6

11

12

14

Used on units with Serial Number HL-1000

311-005 Power Examination Table 115 V.

1 • •Back Components............................ 6-3

2 • • • • Upholstery Set - Thermo................ 6-4

3 • • • • Upholstery Set - Standard.............. 6-5

4 • • • • Upholstery Set - Narrow ................ 6-6

5 • • • • Upholstery Set - Styled .................. 6-7

6 • • • • Hydraulic System........................... 6-8

7 • • • • Headrest Assembly ....................... 6-9

8 • • Seat Components .......................... 6-10

9 • • • • Stirrup Assembly.......................... 6-11

10 • •Footboard Components.................. 6-12

11 • •Base Covers And Enclosures ........ 6-13

12 • •• Side Panel Assembly.................... 6-14

13 • •Base Mechanical Components ....... 6-15

14 • •• Rotational Base Assembly............ 6-16

15 • • • • Base Slide Assembly.................... 6-17

16 • •Base Electrical Components........... 6-18

17 • • • • Motor / Pump Assembly ............... 6-19

18 • •Foot Control Assembly ................... 6-20

(Serial Number Prefix HL-****) ............ Ref

Always Specify Model & Serial Number

10

18

13

15

MA377200

Item Part No. Description PageItem Part No. Description Page

OPTIONAL ACCESSORIES

Refer to MEDICAL ACCESSORY BOOK {004-0096-00}

19 • 9A4300X • Chair Arm...................................... 9A43

20 • 9A5100X • Facial Pad ..................................... 9A51

21 • 9A6000X • Restraint Belts............................... 9A60

22 • 9A7700X • I.V. Pole ........................................ 9A77

23 • 9A7800X • Vision Block Screen ...................... 9A78

24 • 9A8100X • Articulating Armboard .................... 9A81

25 • 9A8200X • Special Procedures Armboard...... 9A82

26 • 9A8300X • Instrument Tray ............................ 9A83

27 • 9A14700X • Knee Crutch Assy. ...................... 9A147

28 • 9A15700X • Side Rail Accessory .................... 9A157

29 • 9A17900X • Fixed Armboard .......................... 9A179

30 • 9A18200X • Welch Allyn Hanger Accessory ... 9A182

31 • 9A18400X • Base Rail / Welch Allyn Brkt......... 9A184

32 • 9A19800X • Round Headrest.......................... 9A198

33 • 9A19900X • Special Procedures Headrest..... 9A199

34 • 9A2000XX • Panel Insert Set........................ 6-4 / 6-7

35 • 9A20900X • Knee Crutch Assy. ...................... 9A209

36 • 9A22100X • Single Wrist Support .................... 9A221

37 • 9A22200X • Double Wrist Support .................. 9A222

38 • 9A22800X • Seat Rail Assembly ..................... 9A228

39 • 9A26700X • Instrument Tray Assembly ......... 9A267

40 • 9A26800X • Instrument Tray .......................... 9A268

© Midmark Corporation 1997 SF1548 Rev. 2/00 Page 6-2 Printed in U.S.A.

Back Components

Return To Table Of Contents

2

3

SECTION VI

PARTS LIST

1

21

25

26

27

22

23

7

24

4

17

20

5

19

18

17

16

9

6

15

8

12

14

13

7

10

11

MA377300

Used on units with Serial Number HL-1000 thru HL1254

1 050-0472-40 Paper Cover.......................................... 1

2 045-0001-12 Curved Washer ..................................... 2

3 042-0010-03 Pop Rivet .............................................. 2

4 030-0912-40 Back Weldment ..................................... 1

5 042-0010-11 Pop Rivet .............................................. 4

6 Upholstered Back Section (Refer to

"Upholstery Set" Elsewhere) ................. 1

7 040-0250-88 Screw ................................................... 8

8 045-0001-31 Lockwasher .......................................... 1

9 015-0082-02 Grounding Braid .................................... 1

10 040-0010-04 Screw ................................................... 1

11 040-0250-10 Screw ................................................... 1

12 045-0001-05 Lockwasher .......................................... 1

13 042-0001-02 Roll Pin .................................................. 2

14 040-0375-15 Screw ................................................... 4

© Midmark Corporation 1997 SF1548 Rev. 1/01 Page 6-3 Printed in U.S.A.

Item Part No. Description Qty.Item Part No. Description Qty.

15 057-0057-42 Mount .................................................... 4

16 051-0112-00 Plated Side Rail ..................................... 2

17 042-0007-00 E-Ring ................................................... 4

18 042-0006-01 Clevis Pin .............................................. 1

19 Back Cylinder (Refer to "Hydraulic

System" Elsewhere) .............................. 1

20 042-0006-00 Clevis Pin .............................................. 1

21 016-0542-00 Slide Latch Assembly ............................ 2

22 Two Arm Headlock (Refer to "Headrest

Assembly" Elsewhere) ......................... 1

23 050-0872-40 Back Cover ........................................... 1

24 040-0006-06 Screw ................................................... 4

25 Serial Number Tag ................................ 1

26 061-0620-00 U.L. / C.U.L. Label ................................ 1

27 061-0291-00 Patent Label ......................................... 1

Always Specify Model & Serial Number

Back Components

Return To Table Of Contents

SECTION VI

PARTS LIST

Used on units with Serial Number HL-1255 thru HL-1342

1 050-0472-40 Paper Cover.......................................... 1

2 045-0001-12 Curved Washer ..................................... 2

3 042-0010-03 Pop Rivet .............................................. 2

4 030-1289-40 Back Weldment ..................................... 1

5 042-0010-11 Pop Rivet .............................................. 4

6 Upholstered Back Section (Refer to

"Upholstery Set" Elsewhere) ................. 1

7 040-0250-88 Screw ................................................... 4

8 045-0001-31 Lockwasher .......................................... 1

9 015-0082-02 Grounding Braid .................................... 1

10 040-0010-04 Screw ................................................... 1

11 040-0250-39 Screw .................................................... 2

12 045-0001-05 Lockwasher .......................................... 1

13 042-0001-02 Roll Pin .................................................. 2

14 040-0375-15 Screw ................................................... 4

15 057-0057-42 Mount .................................................... 4

16 051-0112-00 Plated Side Rail ..................................... 2

© Midmark Corporation 1997 SF1548 Rev. 1/02 Page 6-3.1 Printed in U.S.A.

MA377301
MA377300

Item Part No. Description Qty.Item Part No. Description Qty.

17 042-0007-00 E-Ring ................................................... 4

18 042-0006-01 Clevis Pin .............................................. 1

19 Back Cylinder (Refer to "Hydraulic

System" Elsewhere) .............................. 1

20 042-0006-00 Clevis Pin .............................................. 1

21 016-0542-00 Slide Latch Assembly ............................ 2

22 Two Arm Headlock (Refer to "Headrest

Assembly" Elsewhere) ......................... 1

23 050-0872-40 Back Cover ........................................... 1

24 040-0006-06 Screw ................................................... 4

25 Serial Number Tag ................................ 1

26 061-0620-00 U.L. / C.U.L. Label ................................ 1

27 061-0291-00 Patent Label ......................................... 1

28 045-0001-29 Washer, Flat........................................... 1

29 040-0312-08 Screw .................................................... 4

30 050-4924-40 Support Plate.......................................... 2

Always Specify Model & Serial Number

Back Components

Return To Table Of Contents

SECTION VI

PARTS LIST

Used on units with Serial Number HL-1343 thru Present

1 050-0472-40 Paper Cover.......................................... 1

2 045-0001-12 Curved Washer ..................................... 2

3 042-0010-03 Pop Rivet .............................................. 2

4 030-1332-40 Back Weldment ..................................... 1

5 042-0010-11 Pop Rivet .............................................. 4

6 Upholstered Back Section (Refer to

"Upholstery Set" Elsewhere) ................. 1

7 040-0250-88 Screw ................................................... 4

8 045-0001-31 Lockwasher .......................................... 1

9 015-0082-02 Grounding Braid .................................... 1

10 040-0010-04 Screw ................................................... 1

11 040-0250-39 Screw .................................................... 2

12 045-0001-05 Lockwasher .......................................... 1

13 042-0001-02 Roll Pin .................................................. 2

14 040-0375-15 Screw ................................................... 4

15 057-0057-42 Mount .................................................... 4

16 051-0112-00 Plated Side Rail ..................................... 2

© Midmark Corporation 1997 SF1548 Page 6-3.2 Printed in U.S.A.

MA377301
MA377300

Item Part No. Description Qty.Item Part No. Description Qty.

17 042-0007-00 E-Ring ................................................... 4

18 042-0006-01 Clevis Pin .............................................. 1

19 Back Cylinder (Refer to "Hydraulic

System" Elsewhere) .............................. 1

20 042-0006-02 Clevis Pin .............................................. 1

21 016-0542-00 Slide Latch Assembly ............................ 2

22 Two Arm Headlock (Refer to "Headrest

Assembly" Elsewhere) ......................... 1

23 050-0872-40 Back Cover ........................................... 1

24 040-0006-06 Screw ................................................... 4

25 Serial Number Tag ................................ 1

26 061-0620-00 U.L. / C.U.L. Label ................................ 1

27 061-0291-00 Patent Label ......................................... 1

28 045-0001-29 Washer, Flat........................................... 1

29 040-0312-08 Screw .................................................... 4

30 050-4924-40 Support Plate .......................................... 2

Always Specify Model & Serial Number

Upholstery Set - Thermo

Return To Table Of Contents

1

2

3

SECTION VI

PARTS LIST

18

12

13

14

5

4

6

7

8

9

002-0557-***-*** Upholstery Set-Thermo (Includes

1 • 028-0458-XX • Headrest {Specify Color}..................... 1

2 • 058-0001-03 • Bag Clip .............................................. 2

3 • 040-0006-27 • Screw ................................................. 2

4 • 040-0010-13 • Screw (Apply Loctite #042-0024-02) ... 3

5 • 053-0582-01 • Headboard Pillow Mount ...................... 1

6 • 042-0137-00 • Upholstery Latch Stud ....................... 12

7 • 040-0010-104 • Screw ................................................. 9

8 • 053-0105-26 • Velcro Tape ........................................ 1

9 • 042-0120-00 • Upholstery Mount Stud

10 • 050-3102-40 • Seat Cover.......................................... 2

11 • 040-0006-00 • Screw ............................................... 10

12 • 028-0471-XX • Back/Seat Section {Specify Color}...... 1

13 • 016-0022-00 • Stud .................................................... 4

14 • 002-0146-00 • Paper Tear Strip Set............................ 1

15 • 028-0461-XX • Legrest-Styled {Specify Color} ............ 1

16 • 057-0379-00 • Spacer ................................................ 2

17 • 028-0457-XX • Footrest-Styled {Specify Color} ............ 1

18 • 9A2000XX • Panel Insert Set {Specify Color} ....... AR

Items 1 thru 18) {Specify Color}............. 1

(Apply Loctite #042-0024-02) .............. 3

Always Specify Model & Serial Number

6

10

15

17

7

16

6

6

11

7

MA403500

Item Part No. Description Qty.Item Part No. Description Qty.

The following are the current stock

upholstery colors for upholstery kits.

Part No. Upholstery Color Qty.

***- ****-103-*** Slate Grey ................................... AR

***- ****-095-*** Sand Grey ................................... AR

***- ****-096-*** Iris Blue........................................ AR

***- ****-100-*** Nile Green ................................... AR

***- ****-101-*** Royal Lavander ........................... AR

***- ****-102-*** Terra Rosa .................................. AR

The following are current stock panel

colors for upholstery kits.

Part No. Panel Color Qty.

***- ****-***-014 Slate Grey........................................ AR

***- ****-***-031 Sand Grey ....................................... AR

***- ****-***-033 Nile Green......................................... AR

***-**** -***-034 Royal Lavander................................. AR

***- ****-***-035 Terra Rosa ....................................... AR

***- ****-***-036 Iris Blue............................................. AR

© Midmark Corporation 1997 SF1548 Page 6-4 Printed in U.S.A.

Upholstery Set - Standard

Return To Table Of Contents

19

SECTION VI

PARTS LIST

18

20

17

16

1

15

14

13

7
8

6

2

7

9

3

5

4

7

8

12

7

7

10

11

8

MA377600

Item Part No. Description Qty.Item Part No. Description Qty.

002-0558-***-*** Upholstery Set-Standard Width (Incl.

1 • 053-0628-01 • Headrest Cover .................................. 1

2 • 040-0006-20 • Screw ................................................. 6

3 • 058-0001-03 • Bag Clip .............................................. 2

4 • 040-0006-00 • Screw ................................................. 2

5 • 040-0010-78 • Screw (Apply Loctite #042-0024-00) ... 3

6 • 053-0582-01 • Headboard Pillow Mount ...................... 1

7 • 042-0137-00 • Upholstery Latch Stud ....................... 12

8 • 040-0010-104 • Screw ................................................. 9

9 • 042-0120-00 • Upholstery Mount Stud (Apply

10 • 050-3102-40 • Seat Cover.......................................... 1

11 • 040-0006-00 • Screw ............................................... 10

12 • 057-0379-00 • Spacer ................................................ 2

13 • 028-0389-XX • Footrest {Specify Color} ....................... 1

14 • 028-0123-XX • Legrest {Specify Color} ....................... 1

15 • 002-0146-00 • Paper Tear Strip Set............................ 1

16 • 016-0022-00 • Stud .................................................... 4

17 • 028-0388-XX • Seat Section-Std. {Specify Color} ....... 1

18 • 028-0387-XX • Back Section-Std. {Specify Color} ...... 1

19 • 028-0395-XX • Headrest {Specify Color}..................... 1

20 • 9A2000XX • Panel Insert Set {Specify Color} ....... AR

© Midmark Corporation 1997 SF1548 Page 6-5 Printed in U.S.A.

Items 1 thru 20) {Specify Color}............. 1

Part No. Upholstery Color Qty.

***- ****-059-*** Slate Grey ................................... AR

***- ****-090-*** Sand Grey ................................... AR

***- ****-091-*** Iris Blue........................................ AR

***- ****-092-*** Nile Green ................................... AR

***- ****-093-*** Royal Lavander ........................... AR

***- ****-094-*** Terra Rosa .................................. AR

Loctite # 042-0024-00) ........................ 3

Part No. Panel Color Qty.

***- ****-***-014 Slate Grey........................................ AR

***- ****-***-031 Sand Grey ....................................... AR

***- ****-***-033 Nile Green......................................... AR

***-**** -***-034 Royal Lavander................................. AR

***- ****-***-035 Terra Rosa ....................................... AR

***- ****-***-036 Iris Blue............................................. AR

Always Specify Model & Serial Number

The following are the current stock

upholstery colors for upholstery kits.

The following are current stock panel

colors for upholstery kits.

Upholstery Set - Narro w

Return To Table Of Contents

19

SECTION VI

PARTS LIST

18

20

17

16

1

15

14

13

7
8

6

2

7

9

3

5

4

7

8

12

7

7

10

11

8

002-0559-***-*** Upholstery Set-Narrow Width (Incl. Items

1 thru 20) {Specific Color}..................... 1

1 • 053-0628-01 • Headrest Cover .................................. 1

2 • 040-0006-20 • Screw ................................................. 6

3 • 058-0001-03 • Bag Clip .............................................. 2

4 • 040-0006-00 • Screw ................................................. 2

5 • 040-0010-78 • Screw (Apply Loctite # 042-0024-00) .. 3

6 • 053-0582-01 • Headboard Pillow Mount ...................... 1

7 • 042-0137-00 • Upholstery Latch Stud ....................... 12

8 • 040-0010-104 • Screw ................................................. 9

9 • 042-0120-00 • Upholstery Mount Stud (Apply

Loctite # 042-0024-00) ........................ 3

10 • 050-3103-40 • Seat Cover - R.H. (Shown) ................. 1

• 050-3103-41 • Seat Cover - L.H. ................................ 1

11 • 040-0006-00 • Screw ............................................... 10

12 • 057-0379-00 • Spacer ................................................ 2

13 • 028-0389-XX • Footrest {Specify Color} ....................... 1

14 • 028-0123-XX • Legrest {Specify Color} ....................... 1

15 • 029-0017-02 • Paper Tear Strip Set (24") ................... 1

16 • 016-0022-00 • Stud .................................................... 4

17 • 028-0391-XX • Seat Section-Narrow {Specify Color} .. 1
18 • 028-0390-XX • Back Section-Narrow {Specify Color} .. 1

19 • 028-0395-XX • Headrest {Specify Color}..................... 1

20 • 9A2000XX • Panel Insert Set {Specify Color} .......... 1

Always Specify Model & Serial Number

MA377500

Item Part No. Description Qty.Item Part No. Description Qty.

The following are the current stock
upholstery colors for upholstery kits.

Part No. Upholstery Color Qty.

***- ****-059-*** Slate Grey ................................... AR

***- ****-090-*** Sand Grey ................................... AR

***- ****-091-*** Iris Blue........................................ AR

***- ****-092-*** Nile Green ................................... AR

***- ****-093-*** Royal Lavander ........................... AR

***- ****-094-*** Terra Rosa .................................. AR

The following are current stock panel
colors for upholstery kits.

Part No. Panel Color Qty.

***- ****-***-014 Slate Grey........................................ AR

***- ****-***-031 Sand Grey ....................................... AR

***- ****-***-033 Nile Green......................................... AR

***-**** -***-034 Royal Lavander................................. AR

***- ****-***-035 Terra Rosa ....................................... AR

***- ****-***-036 Iris Blue............................................. AR

© Midmark Corporation 1997 SF1548 Page 6-6 Printed in U.S.A.

Upholstery Set - Styled

Return To Table Of Contents

1

8

2

3

SECTION VI

PARTS LIST

18

12

13

14

4

5

6

19

7

9

10

002-0560-***-*** Upholstery Set-Styled (Includes

Items 1 thru 19) {Specify Color}............. 1

1 • 028-0406-XX • Headrest-Styled {Specify Color} .......... 1

2 • 058-0001-03 • Bag Clip .............................................. 2

3 • 040-0006-52 • Screw ................................................. 2

4 • 050-2690-40 • Headboard Cover ............................... 1

5 • 053-0582-01 • Headboard Pillow Mount ...................... 1

6 • 042-0137-00 • Upholstery Latch Stud ....................... 12

7 • 040-0010-104 • Screw ................................................. 9

8 • 028-0392-XX • Back Section-Styled {Specify Color}.... 1

9 • 042-0120-00 • Upholstery Mount Stud ........................ 3

10 • 050-3102-40 • Seat Cover.......................................... 2

11 • 040-0006-00 • Screw ............................................... 10

12 • 028-0393-XX • Seat Section-Styled {Specify Color}.... 1

13 • 016-0022-00 • Stud .................................................... 4

14 • 002-0146-00 • Paper Tear Strip Set............................ 1

15 • 028-0287-XX • Legrest-Styled {Specify Color} ............ 1

16 • 057-0379-00 • Spacer ................................................ 2

17 • 028-0394-XX • Footrest-Styled {Specify Color} ............ 1

18 • 9A2000XX • Panel Insert Set {Specify Color} ....... AR

19 • 040-0010-13 • Screw ................................................. 3

15

17

6

7

16

6

6

11

7

Item Part No. Description Qty.Item Part No. Description Qty.

The following are the current stock
upholstery colors for upholstery kits.

Part No. Upholstery Color Qty.

***- ****-059-*** Slate Grey ................................... AR

***- ****-080-*** Monoco........................................ AR

***- ****-081-*** Wedgewood ................................. AR

***- ****-082-*** Royal Carriage............................. AR

***- ****-083-*** Monet .......................................... AR

***- ****-084-*** Soft Pearl ..................................... AR

***- ****-085-*** English Gardens .......................... AR

***- ****-086-*** Waterford..................................... AR

***- ****-087-*** Cabernet...................................... AR

***- ****-088-*** Tapestry ...................................... AR

***- ****-089-*** Cathedral ..................................... AR

***- ****-090-*** Sand Grey ................................... AR

***- ****-091-*** Iris Blue........................................ AR

***- ****-092-*** Nile Green ................................... AR

***- ****-093-*** Royal Lavander ........................... AR

***- ****-094-*** Terra Rosa .................................. AR

The following are current stock panel
colors for upholstery kits.

MA403600

© Midmark Corporation 1997 SF1548 Rev. 11/99 Page 6-7 Printed in U.S.A.

Part No. Panel Color Qty.

***- ****-***-014 Slate Grey........................................ AR

***- ****-***-031 Sand Grey ....................................... AR

***- ****-***-033 Nile Green......................................... AR

***-**** -***-034 Royal Lavander................................. AR

***- ****-***-035 Terra Rosa ....................................... AR

***- ****-***-036 Iris Blue............................................. AR

Always Specify Model & Serial Number

Hydraulic System

Return To Table Of Contents

SECTION VI

PARTS LIST

NOTE

Cut cable ties as necessary to remove cylinders or replace hoses. Before disassembly, take special notice of
hose positioning and the cable tie locations securing hoses. Also, note the length and radius of all hose return
loops. Duplicating these hose positions, cable tie locations, and loop sizes when re-installing hoses and / or
cylinders will ensure the minimum bend-radius of the hose will not be reduced, risking collapse and / or
premature failure of the hose.

24

21

23

TYPICAL ON

ALL CYLINDERS

22

20

19

17

16

18

14

15

12

13

11

5

1

4

8

10

6

9

2

3

7

MA377800

Item Part No. Description Qty.Item Part No. Description Qty.

1 002-0444-00 Motor / Pump Components (See

Breakdown Elsewhere) ...................... Ref

2 002-0001-00 Base Cylinder Kit ................................... 1

3 014-0135-00 Base Tee .............................................. 1

4 014-0098-00 Union Tee ............................................. 1

5 002-0120-00 Hose Assembly Kit ................................ 1

6 002-0117-00 Hose Assembly Kit ................................ 1

7 002-0119-00 Hose Assembly Kit ................................ 1

8 002-0122-00 Hose Assembly Kit ................................ 1

9 002-0121-00 Hose Assembly Kit ................................ 1

10 014-0136-00 Tilt Power Manifold ................................ 1

11 002-0123-00 Hose Assembly Kit ................................ 1

12 061-0113-00 Safety Cable Label ................................ 1

13 016-0161-00 Safety Cable.......................................... 1

Always Specify Model & Serial Number

© Midmark Corporation 1997 SF1548 Rev. 9/01 Page 6-8 Printed in U.S.A.

14 014-0137-00 Return Manifold ..................................... 1

15 002-0125-00 Hose Assembly Kit ................................ 1

16 002-0126-00 Hose Assembly Kit ................................ 1

17 002-0002-00 Tilt Cylinder Kit ...................................... 1

18 002-0124-00 Hose Assembly Kit ................................ 1

19 002-0003-00 Foot Cylinder Kit .................................... 1

20 002-0346-00 Back Cylinder KIt ................................... 1

21 025-0032-00 Rod Wiper Bracket ............................. AR

22 054-0109-00 Felt Wiper (1") .................................... AR

23 054-0108-00 Felt Wiper (11/16") ............................. AR

24 053-0226-03 Snap-in Nyliner Bearing ...................... AR

25 015-0013-00 Cable Tie (Not Shown) .......................... 6

26 015-0016-00 Cable Tie (Not Shown) .......................... 9

27 015-0017-00 Cable Tie (Not Shown) .......................... 1

Headrest Assembly

Return To Table Of Contents

SECTION VI

PARTS LIST

14

11

7

16

17

11

10

9

13

18

9

6

1

5

2

12

15

8

19

15

20

14

21

3

4

16

22

Used on units with Serial Number HL1000 thru HL1182

1 Upholstered Headrest {Specify Color}

(Refer to "Upholstery Set" Elsewhere)... 1

2 053-0581-01 Headboard Pivot Mount ......................... 1

3 040-0250-26 Set Screw (Apply Loctite

Loctite #042-0024-00) ........................... 1

4 057-0375-00 Headboard Pivot Pin .............................. 1

5 040-0250-79 Screw ................................................... 1

6 016-0542-01 Slide Latch ............................................ 3

7 029-1100-07 Two Arm Headlock Assembly

(Includes Items 8 thru 22) ..................... 1

8 • 040-0250-11 • Screw ................................................. 1

9 • 040-0010-14 • Set Screw ........................................... 2

10 • 030-0131-47 • Headlock Head ................................... 1

© Midmark Corporation 1997 SF1548 Rev. 1/00 Page 6-9 Printed in U.S.A.

Item Part No. Description Qty.Item Part No. Description Qty.

11 • 042-0002-08 • Dowel Pin ............................................ 4

12 • 057-0048-01 • Pivot Bar ............................................. 1

13 • 051-0080-100 • Draw Bar............................................. 1

14 • 030-0123-42 • Head Pivot Handle Weldment .............. 2

15 • 042-0002-04 • Dowel Pin ............................................ 2

16 • 041-0250-12 • Jam Nut .............................................. 2

17 • 040-0250-70 • Set Screw ........................................... 2

18 • 040-0250-27 • Screw ................................................. 1

19 • 040-0250-139 • Screw ................................................. 4

20 • 030-0132-42 • Headlock Base.................................... 1

21 • 057-0048-00 • Pivot Bar ............................................. 1

22 • 051-0080-00 • Draw Bar............................................. 1

Always Specify Model & Serial Number

17

11

MA377900

Headrest Assembly

Return To Table Of Contents

SECTION VI

PARTS LIST

14

11

7

16

17

11

10

9

13

18

9

6

1

5

2

12

15

8

19

15

20

14

21

3

4

16

22

Used on units with Serial Number HL1183 thru HL1454

1 Upholstered Headrest {Specify Color}

(Refer to "Upholstery Set" Elsewhere) ... 1

2 053-1047-01 Headboard Pivot Mount ......................... 1

3 040-0008-35 Screw (Apply Loctite

Loctite #042-0024-00) ........................... 1

4 057-0528-00 Headboard Pivot Pin .............................. 1

5 040-0250-79 Screw ................................................... 1

6 016-0542-01 Slide Latch ............................................ 3

7 029-1100-07 Two Arm Headlock Assembly

(Includes Items 8 thru 22) ..................... 1

8 • 040-0250-11 • Screw ................................................. 1

9 • 040-0010-14 • Set Screw ........................................... 2

10 • 030-0131-47 • Headlock Head ................................... 1

© Midmark Corporation 1997 SF1548 Rev. 9/03 Page 6-9.1 Printed in U.S.A.

Item Part No. Description Qty.Item Part No. Description Qty.

11 • 042-0002-08 • Dowel Pin ............................................ 4

12 • 057-0048-01 • Pivot Bar ............................................. 1

13 • 051-0080-100 • D raw Bar ............................................. 1

14 • 030-0123-42 • Head Pivot Handle Weldment .............. 2

15 • 042-0002-04 • Dowel Pin ............................................ 2

16 • 041-0250-12 • Jam Nut .............................................. 2

17 • 040-0250-70 • Set Screw ........................................... 2

18 • 040-0250-27 • Screw ................................................. 1

19 • 040-0250-139 • Screw ................................................. 4

20 • 030-0132-42 • Headlock Base .................................... 1

21 • 057-0048-00 • Pivot Bar ............................................. 1

22 • 051-0080-00 • Draw Bar ............................................. 1

Always Specify Model & Serial Number

17

11

MA377901

Headrest Assembly

Return To Table Of Contents

SECTION VI

PARTS LIST

14

7

11

13

11

16

10

9

9

6

1

5

2

12

15

8

17

18

15

14

19

3

4

20

11

Used on units with Serial Number HL1455 thru Present

1 Upholstered Headrest {Specify Color}

(Refer to "Upholstery Set" Elsewhere) ... 1

2 053-1047-01 Headboard Pivot Mount ......................... 1

3 040-0008-35 Screw (Apply Loctite

Loctite #042-0024-00) ........................... 1

4 057-0528-00 Headboard Pivot Pin .............................. 1

5 040-0250-79 Screw ................................................... 1

6 016-0542-01 Slide Latch ............................................ 3

7 029-3063-01 Two Arm Headlock Assembly

(Includes Items 8 thru 20) ..................... 1

8 • 040-0250-11 • Screw ................................................. 1

9 • 040-0010-14 • Set Screw ........................................... 2

© Midmark Corporation 1997 SF1548 Page 6-9.2 Printed in U.S.A.

MA629800i

Item Part No. Description Qty.Item Part No. Description Qty.

10 • 030-0131-48 • Headlock Head ................................... 1

11 • 042-0002-08 • Dowel Pin ............................................ 4

12 • 057-0048-01 • Pivot Bar ............................................. 1

13 • 051-0080-107 • Dra w Bar ............................................. 1

14 • 020-0236-42 • Over Center Handle ............................ 2

15 • 042-0002-04 • Dowel Pin ............................................ 2

16 • 040-0250-27 • Screw ................................................. 1

17 • 040-0250-139 • Screw ................................................. 4

18 • 030-0132-44 • Headlock Base .................................... 1

19 • 057-0048-00 • Pivot Bar ............................................. 1

22 • 051-0080-105 • Dra w Bar ............................................. 1

Always Specify Model & Serial Number

Seat Components

Return To Table Of Contents

1

SECTION VI

PARTS LIST

4

26

27

30

28

5

29

7

25

24

23

22

21

2

8

9

3

6

Used on units with Serial Number HL-1000 thru HL-1254

1 Stirrup Assembly {Includes Items 8 &

2 016-0373-00 Treatment Pan ...................................... 1

3 029-1276-01 Pan Slide Assembly ............................... 1

4 Upholstered Seat Section (Refer to

5 042-0010-11 Pop Rivet .............................................. 4

6 016-0542-00 Slide Latch Assembly ............................ 2

7 016-0140-00 Trim Lock (Specify Length - 1 1/2") ....... 2

8 040-0010-47 Screw ................................................... 2

9 040-0375-15 Screw ................................................... 4

10 015-0082-01 Ground Braid......................................... 1

11 040-0001-31 Lockwasher .......................................... 1

12 040-0010-04 Screw ................................................... 3

13 045-0001-39 Washer ................................................. 4

14 045-0001-19 Lockwasher .......................................... 4

9} (Refer to Breakdown Elsewhere) ...... 2

"Uphholstery Set" Elsewhere) ............... 1

Always Specify Model & Serial Number

20

11

19

10

12

13

14

18

16

15

17

12

Item Part No. Description Qty.Item Part No. Description Qty.

15 041-0008-00 Nut ....................................................... 4

16 015-0001-00 Wire Clip ................................................ 1

17 015-0014-00 Wire Clip ................................................ 1

18 016-0162-00 Trim Lock (Specify Length - 15") ........... 1

19 053-0050-00 Hole Plug ............................................... 2

20 030-1042-40 Seat Weldment ...................................... 1

21 053-0068-06 Snap Bushing ........................................ 2

22 050-1127-40 Switch Bracket ...................................... 1

23 045-0001-15 Washer ................................................. 2

24 045-0001-04 Lockwasher .......................................... 2

25 040-0010-35 Screw ................................................... 2

26 040-0004-09 Screw ................................................... 2

27 015-0425-00 Limit Switch ........................................... 1

28 045-0001-38 Lockwasher .......................................... 2

29 041-0004-01 Nut ....................................................... 2

30 016-0140-00 Trim Lock (Specify Length - 2") ............. 2

MA378000

© Midmark Corporation 1997 SF1548 Rev. 1/01 Page 6-10 Printed in U.S.7.3

Seat Components

Return To Table Of Contents

1

SECTION VI

PARTS LIST

4

26

27

30

28

5

29

7

25

24

23

22

21

2

8

9

3

6

Used on units with Serial Number HL-1255 thru HL-1342

1 Stirrup Assembly {Includes Items 8 &

2 016-0373-00 Treatment Pan ...................................... 1

3 029-1276-01 Pan Slide Assembly ............................... 1

4 Upholstered Seat Section (Refer to

5 042-0010-11 Pop Rivet .............................................. 4

6 016-0542-00 Slide Latch Assembly ............................ 2

7 016-0140-00 Trim Lock (Specify Length - 1 1/2") ....... 2

8 040-0010-47 Screw ................................................... 2

9 040-0375-15 Screw ................................................... 4

10 015-0082-01 Ground Braid......................................... 1

11 040-0001-31 Lockwasher .......................................... 1

12 040-0010-04 Screw ................................................... 3

13 045-0001-39 Washer ................................................. 4

14 045-0001-19 Lockwasher .......................................... 4

9} (Refer to Breakdown Elsewhere) ...... 2

"Uphholstery Set" Elsewhere) ............... 1

Always Specify Model & Serial Number

20

11

19

10

12

13

14

18

16

15

17

12

Item Part No. Description Qty.Item Part No. Description Qty.

15 041-0008-00 Nut ....................................................... 4

16 015-0001-00 Wire Clip ................................................ 1

17 015-0014-00 Wire Clip ................................................ 1

18 016-0162-00 Trim Lock (Specify Length - 15") ........... 1

19 053-0050-00 Hole Plug ............................................... 2

20 030-1288-40 Seat Weldment ...................................... 1

21 053-0068-06 Snap Bushing ........................................ 2

22 050-1127-40 Switch Bracket ...................................... 1

23 045-0001-15 Washer ................................................. 2

24 045-0001-04 Lockwasher .......................................... 2

25 040-0010-35 Screw ................................................... 2

26 040-0004-09 Screw ................................................... 2

27 015-0425-00 Limit Switch ........................................... 1

28 045-0001-38 Lockwasher .......................................... 2

29 041-0004-01 Nut ....................................................... 2

30 016-0140-00 Trim Lock (Specify Length - 2") ............. 2

MA378000

MA378000

© Midmark Corporation 1997 SF1548 Rev. 1/02 Page 6-10.1 Printed in U.S.A

Seat Components

Return To Table Of Contents

1

SECTION VI

PARTS LIST

4

26

27

30

28

5

29

7

25

24

23

22

21

2

8

9

3

6

Used on units with Serial Number HL-1343 thru Present

1 Stirrup Assembly {Includes Items 8 &

2 016-0373-00 Treatment Pan ...................................... 1

3 029-1276-01 Pan Slide Assembly ............................... 1

4 Upholstered Seat Section (Refer to

5 042-0010-11 Pop Rivet .............................................. 4

6 016-0542-00 Slide Latch Assembly ............................ 2

7 016-0140-00 Trim Lock (Specify Length - 1 1/2") ....... 2

8 040-0010-47 Screw ................................................... 2

9 040-0375-15 Screw ................................................... 4

10 015-0082-01 Ground Braid......................................... 1

11 040-0001-31 Lockwasher .......................................... 1

12 040-0010-04 Screw ................................................... 3

13 045-0001-39 Washer ................................................. 4

14 045-0001-19 Lockwasher .......................................... 4

9} (Refer to Breakdown Elsewhere) ...... 2

"Uphholstery Set" Elsewhere) ............... 1

Always Specify Model & Serial Number

20

11

19

10

12

13

14

18

16

15

17

12

Item Part No. Description Qty.Item Part No. Description Qty.

15 041-0008-00 Nut ....................................................... 4

16 015-0001-00 Wire Clip................................................ 1

17 015-0014-00 Wire Clip................................................ 1

18 016-0162-00 Trim Lock (Specify Length - 15") ........... 1

19 053-0050-00 Hole Plug............................................... 2

20 030-1331-40 Seat Weldment ...................................... 1

21 053-0068-06 Snap Bushing ........................................ 2

22 050-1127-40 Switch Bracket ...................................... 1

23 045-0001-15 Washer ................................................. 2

24 045-0001-04 Lockwasher .......................................... 2

25 040-0010-35 Screw ................................................... 2

26 040-0004-09 Screw ................................................... 2

27 015-0425-00 Limit Switch ........................................... 1

28 045-0001-38 Lockwasher .......................................... 2

29 041-0004-01 Nut ....................................................... 2

30 016-0140-00 Trim Lock (Specify Length - 2") ............. 2

MA378000

MA378000

© Midmark Corporation 1997 SF1548 Page 6-10.2 Printed in U.S.A

Stirrup Assembly

Return To Table Of Contents

SECTION VI

PARTS LIST

10

7

9

1

8

11

2

13

10

12

3

6

14

4

This assembly is no longer available.
It has been replaced by 002-0719-04.
Note: This kit contains only one

5

stirrup.

MA378100

Used on units with Serial Number HL-1000 thru HL-1391

029-1394-02 R.H. Stirrup Assembly {Shown}

(Includes Items 1 thru 13) ..................... 1

029-1394-03 L.H. Stirrup Assembly {Not Shown}

(Includes Items 1 thru 13) ..................... 1

1 • 029-1397-03 • Stirrup Assembly (Includes

Items 2 thru 6)..................................... 1

2 • • 020-0181-30 • • Coated Stirrup ................................... 1

3 • • 020-0182-30 • • Pivot Block ........................................ 1

4 • • 042-0001-00 • • Roll Pin.............................................. 2

5 • • 040-0250-15 • • Set Screw ......................................... 1

6 • • 051-0668-00 • • Horizontal Stirrup Bar (Black) ............ 1

7 • 053-0387-00 • Pivot Boss........................................... 1

© Midmark Corporation 1997 SF1548 Rev. 1/03 Page 6-11 Printed in U.S.A.

MA378000

Item Part No. Description Qty.Item Part No. Description Qty.

8 • 030-0736-40 • R.H. Stirrup Mount Weldment

(Show n) .............................................. 1

• 030-0737-40 • L.H. Stirrup Mount Weldment

(Not Shown)...........................................

9 • 050-5027-00 • Stirrup Guide Bracket .......................... 1

10 • 040-0010-47 • Screw ................................................. 2

11 • 016-0400-00 • Stirrup Index Spring............................. 1

12 • 040-0375-00 • Screw ................................................. 2

13 • 053-0050-05 Hole Plug ( [1] Used on R.H. Stirrup

Mount Weldment, [2] Used on R.H.

Stirrup Mount Weldment ...................... 3

14 061-0296-00 Stirrup Instruction Label (Used on L.H.

Stirrup Mount Weldments Only) ............. 1

Always Specify Model & Serial Number

Stirrup Assembly

Return To Table Of Contents

SECTION VI

PARTS LIST

8

7

5

1

6

9

2

8

4

10

11

3

12

MA613200i

Used on units with Serial Number HL-1392 thru Present

029-1394-02 R.H. Stirrup Assembly {Shown}

(Includes Items 1 thru 13) ..................... 1

029-1394-03 L.H. Stirrup Assembly {Not Shown}

(Includes Items 1 thru 13) ..................... 1

1 • 029-2951-02 • Stirrup Assembly (Includes

Items 2 thru 4)..................................... 1

2 • • 020-0239-30 • • Coated Stirrup................................... 1

3 • • 042-0001-00 • • Roll Pin.............................................. 1

4 • • 051-1003-01 • • Stirrup Bar......................................... 1

5 • 053-0387-00 • Pivot Boss........................................... 1

6 • 030-0736-40 • R.H. Stirrup Mount Weldment

(Show n) .............................................. 1

© Midmark Corporation 1997 SF1548 Page 6-11.1 Printed in U.S.A.

MA378000

Item Part No. Description Qty.Item Part No. Description Qty.

• 030-0737-40 • L.H. Stirrup Mount Weldment

(Not Shown)...........................................

7 • 050-5027-00 • Stirrup Guide Bracket .......................... 1

8 • 040-0010-47 • Screw ................................................. 2

9 • 016-0400-00 • Stirrup Index Spring............................. 1

10 • 040-0375-00 • Screw ................................................. 2

11 • 053-0050-05 Hole Plug ( [1] Used on R.H. Stirrup

Mount Weldment, [2] Used on R.H.

Stirrup Mount Weldment ...................... 3

12 061-0296-00 Stirrup Instruction Label (Used on L.H.

Stirrup Mount Weldments Only) ............. 1

Always Specify Model & Serial Number

Footboard Components

Return To Table Of Contents

1

SECTION VI

PARTS LIST

2

4

3

6

5

13

8

7

9

10

11

12

14

15

27

16

21

25

23

24

22

19

17

Used on units with Serial Number HL-1000 thru HL1006

1 Upholstered Foot Rest (Refer to

"Upholstery Set " Elsewhere) ............. Ref

2 Upholstered Leg Rest (Refer to

"Upholstery Set " Elsewhere) ............. Ref

3 029-1646-01 Footrest Assembly (Includes

Items 4 thru 9)....................................... 1

4 • 030-1113-40 • Footboard Weldment ........................... 1

5 • 050-0868-00 • Catch Channel .................................... 1

6 • 042-0010-02 • Pop Rivet ............................................ 4

7 • 025-0045-01 • L.H. Spring (Shown) ............................ 1

• 025-0045-00 • R.H. Spring (Not Shown) ..................... 1

8 • 042-0010-11 • Pop Rivet ............................................ 6

9 • 016-0542-01 • Slide Latch Assembly .......................... 3

10 042-0010-04 Pop Rivet .............................................. 8

11 042-0010-13 Pop Rivet .............................................. 4

12 041-0375-05 Jam Nut ................................................ 2

Always Specify Model & Serial Number

18

Item Part No. Description Qty.Item Part No. Description Qty.

13 016-0092-00 Magnet .................................................. 2

14 050-0871-00 Foot Trim .............................................. 1

15 030-0886-40 Front Extension Weldment..................... 1

16 042-0005-03 Clevis Pin .............................................. 1

17 042-0004-00 Pin Clip .................................................. 1

18 Foot Cylinder (Refer to "Hydraulic

19 045-0001-31 Lockwasher .......................................... 1

20 040-0010-47 Screw ................................................... 1

21 016-0076-00 Bushing ................................................. 2

22 015-0082-01 Ground Braid......................................... 1

23 045-0004-00 Washer ................................................. 2

24 042-0014-00 Shoulder Screw..................................... 2

25 042-0007-00 E-Ring ................................................... 2

26 042-0006-01 Clevis Pin .............................................. 1

27 016-0542-00 Slide Latch ............................................ 2

26

System" Elsewhere) ........................... Ref

20

MA378200

© Midmark Corporation 1997 SF1548 Rev. 5/98 Page 6-12 Printed in U.S.A.

Footboard Components

Return To Table Of Contents

1

SECTION VI

PARTS LIST

2

4

6

8

7

3

5

9

10

11

13

12

14

15

27

21

23

24

22

25

19

16

17

Used on units with Serial Number HL-1007 thru HL-1342

1 Upholstered Foot Rest (Refer to

"Upholstery Set " Elsewhere) ............. Ref

2 Upholstered Leg Rest (Refer to

"Upholstery Set " Elsewhere) ............. Ref

3 029-1646-01 Footrest Assembly (Includes

Items 4 thru 9)....................................... 1

4 • 030-1113-40 • Footboard Weldment ........................... 1

5 • 050-0868-00 • Catch Channel .................................... 1

6 • 042-0010-02 • Pop Rivet ............................................ 4

7 • 025-0045-01 • L.H. Spring (Shown) ............................ 1

• 025-0045-00 • R.H. Spring (Not Shown) ..................... 1

8 • 042-0010-11 • Pop Rivet ............................................ 6

9 • 016-0542-01 • Slide Latch Assembly .......................... 3

10 042-0010-04 Pop Rivet .............................................. 8

11 042-0010-13 Pop Rivet .............................................. 4

12 041-0375-05 Jam Nut ................................................ 2

Always Specify Model & Serial Number

18

Item Part No. Description Qty.Item Part No. Description Qty.

13 016-0604-01 Magnet .................................................. 2

14 050-4127-00 Foot Trim .............................................. 1

15 030-0886-40 Front Extension Weldment..................... 1

16 042-0005-03 Clevis Pin .............................................. 1

17 042-0004-00 Pin Clip .................................................. 1

18 Foot Cylinder (Refer to "Hydraulic

19 045-0001-31 Lockwasher .......................................... 1

20 040-0010-47 Screw ................................................... 1

21 016-0076-00 Bushing ................................................. 2

22 015-0082-01 Ground Braid ......................................... 1

23 045-0004-00 Washer ................................................. 2

24 042-0014-00 Shoulder Screw ..................................... 2

25 042-0007-00 E-Ring ................................................... 2

26 042-0006-01 Clevis Pin .............................................. 1

27 016-0542-00 Slide Latch ............................................ 2

26

System" Elsewhere) ........................... Ref

20

MA378201

© Midmark Corporation 1997 SF1548 Rev. 1/02 Page 6-12.1 Printed in U.S.A.

Footboard Components

Return To Table Of Contents

1

SECTION VI

PARTS LIST

2

4

6

8

7

3

5

9

10

11

13

12

14

15

27

21

23

24

22

25

19

16

17

Used on units with Serial Number HL-1343 thru Present

1 Upholstered Foot Rest (Refer to

"Upholstery Set " Elsewhere) ............. Ref

2 Upholstered Leg Rest (Refer to

"Upholstery Set " Elsewhere) ............. Ref

3 029-1646-01 Footrest Assembly (Includes

Items 4 thru 9)....................................... 1

4 • 030-1113-40 • Footboard Weldment ........................... 1

5 • 050-0868-00 • Catch Channel .................................... 1

6 • 042-0010-02 • Pop Rivet ............................................ 4

7 • 025-0045-01 • L.H. Spring (Shown) ............................ 1

• 025-0045-00 • R.H. Spring (Not Shown) ..................... 1

8 • 042-0010-11 • Pop Rivet ............................................ 6

9 • 016-0542-01 • Slide Latch Assembly .......................... 3

10 042-0010-04 Pop Rivet .............................................. 8

11 042-0010-13 Pop Rivet .............................................. 4

12 041-0375-05 Jam Nut ................................................ 2

Always Specify Model & Serial Number

18

Item Part No. Description Qty.Item Part No. Description Qty.

13 053-0018-00 Nyl-o- tape ............................................ 1

14 050-4127-00 Foot Trim .............................................. 1

15 030-1333-40 Front Extension Weldment..................... 1

16 042-0005-03 Clevis Pin .............................................. 1

17 042-0004-00 Pin Clip .................................................. 1

18 Foot Cylinder (Refer to "Hydraulic

19 045-0001-31 Lockwasher .......................................... 1

20 040-0010-47 Screw ................................................... 1

21 016-0076-00 Bushing ................................................. 2

22 015-0082-01 Ground Braid ......................................... 1

23 045-0004-00 Washer ................................................. 2

24 042-0014-00 Shoulder Screw ..................................... 2

25 042-0007-00 E-Ring ................................................... 2

26 042-0006-01 Clevis Pin .............................................. 1

27 016-0542-00 Slide Latch ............................................ 2

26

System" Elsewhere) ........................... Ref

20

MA378201

© Midmark Corporation 1997 SF1548 Rev 2/03 Page 6-12.2 Printed in U.S.A.

Base Covers And Enc losures

Return To Table Of Contents

3

1

2

5

SECTION VI

PARTS LIST

1

13

12

1

4

10

11

14

Ritter 311

6

9

7

8

Item Part No. Description Qty. Item Part No. Description Qty.

1 040-0008-29 Screw ................................................. 24

2 050-2677-40 Back Inner Shroud ................................ 1

3 050-0947-41 L.H. Inner Shroud (Less Nutserts) ........ 1

• 042-0045-02 • Nutsert ................................................ 8

4 029-1585-01 Back Outer Shroud Assembly ............... 1

5 L.H. Side Panel Assembly (Refer to "Side

Panel Assembly" Elsewhere).............. Ref

6 029-1586-01 Motor Cover Assembly.......................... 1

7 061-0293-00 Caution Label ........................................ 1

© Midmark Corporation 1997 SF1548 Rev. 7/00 Page 6-13 Printed in U.S.A.

1

MA378300

8 040-0010-34 Screw ................................................... 6

9 R.H. Side Panel Assembly (Refer to "Side

Panel Assembly" Elsewhere).............. Ref

10 050-0947-20 R.H. Inner Shroud (Less Nutsert)......... 1

• 042-0045-02 • Nutsert ................................................ 8

11 045-0001-15 Washer ................................................. 6

12 050-2617-41 Front Outer Shroud ............................... 1

13 050-0463-40 Front Inner Shroud ................................ 1

14 040-0010-47 Screw ................................................. 12

Always Specify Model & Serial Number

Side P anel Assembly

Return To Table Of Contents

9

10

SECTION VI

PARTS LIST

1

13

12

11

4

5

6

3

2

7

14

Ritter 311

Item Part No. Description Qty. Item Part No. Description Qty.

029-2078-00 R.H. Side Panel Assembly (Includes

Items 1 thru 10)..................................... 1

029-2078-01 L.H. Side Panel Assembly (Includes

Items 1 thru 10)..................................... 1

1 • 061-0640-02 • Nameplate Decal ................................. 1

2 • 040-0006-13 • Screw ................................................. 2

3 • 015-0083-01 • Duplex Receptacle .............................. 1

4 • 053-0068-10 • Snap Bushing ...................................... 1

5 • 042-0045-02 • Nutsert ................................................ 2

6 • 050-2444-40 • Receptacle Mount Bracket .................. 1

7 • 053-0510-01 • Side Panel ........................................... 1

© Midmark Corporation 1997 SF1548 Page 6-14 Printed in U.S.A.

8

MA385300

8 • 040-0006-23 • Screw ................................................. 1

9 • 040-0010-23 • Screw ................................................. 4

10 • 050-2639-40 • R.H. Outer Shroud (Shown) ................ 1

• 050-2639-41 • L.H. Outer Shroud (Not Shown) .......... 1

11 • 040-0008-04 • Screw ................................................. 2

12 042-0045-01 Nutsert .................................................. 4

13 042-0045-02 Nutsert ................................................... 4

14 042-0045-01 Nutsert .................................................. 3

15 Side Panel Insert (Refer to "Upholstery

Sets" Elsewhere)................................ Ref

Always Specify Model & Serial Number

Base Mechanical

Return To Table Of Contents

Components

SECTION VI

PARTS LIST

9

1

14

2

6

17

16

3

15

4

5

11

14

13

8

7

10

6

8

9

12

MA378400

Used on units with Serial Number HL-1000 thru HL-1342

Item Part No. Description Qty.Item Part No. Description Qty.

1 040-0250-04 Set Screw ............................................. 4

2 057-0027-00 Tilt Pivot Pin........................................... 2

3 042-0005-03 Clevis Pin .............................................. 1

4 Base Cylinder (Refer to "Hydraulic

System" Elsewhere)........................... Ref

5 042-0005-01 Clevis Pin .............................................. 1

6 042-0004-00 Hitch Pin Clip .......................................... 2

7 050-1475-40 Brace .................................................... 1

8 040-0375-00 Screw ................................................. 12

9 Seat Weldment (Refer to "Seat

Components" Elsewhere)................... Ref

Always Specify Model & Serial Number

© Midmark Corporation 1997 SF1548 Rev. 1/02 Page 6-15 Printed in U.S.A.

10 015-0001-00 Wire Clip ................................................ 2

11 040-0010-04 Screw ................................................... 2

12 Rotating Base (Refer to "Rotating Base

Assembly" Elsewhere) .......................... 1

13 Base Slide Assembly (Refer to

Breakdown Elsewhere) ...................... Ref

14 042-0007-00 E-Ring ................................................... 4

15 042-0006-01 Clevis Pin .............................................. 1

16 Tilt Cylinder Assembly (Refer to

"Hydraulic System" Elsewhere) .......... Ref

17 042-0006-00 Clevis Pin .............................................. 1

Base Mechanical

Return To Table Of Contents

Components

SECTION VI

PARTS LIST

9

1

14

2

6

17

16

3

15

4

5

11

14

13

8

7

10

6

8

9

12

MA378400

Used on units with Serial Number HL-1343 thru Present

Item Part No. Description Qty.Item Part No. Description Qty.

1 040-0250-04 Set Screw ............................................. 4

2 057-0027-00 Tilt Pivot Pin........................................... 2

3 042-0005-03 Clevis Pin .............................................. 1

4 Base Cylinder (Refer to "Hydraulic

System" Elsewhere)........................... Ref

5 042-0005-01 Clevis Pin .............................................. 1

6 042-0004-00 Hitch Pin Clip .......................................... 2

7 050-1475-40 Brace .................................................... 1

8 040-0375-00 Screw ................................................. 12

9 Seat Weldment (Refer to "Seat

Components" Elsewhere)................... Ref

Always Specify Model & Serial Number

© Midmark Corporation 1997 SF1548 Page 6-15.1 Printed in U.S.A.

10 015-0001-00 Wire Clip................................................ 2

11 040-0010-04 Screw ................................................... 2

12 Rotating Base (Refer to "Rotating Base

Assembly" Elsewhere) .......................... 1

13 Base Slide Assembly (Refer to

Breakdown Elsewhere) ...................... Ref

14 042-0007-00 E-Ring ................................................... 4

15 042-0006-01 Clevis Pin .............................................. 1

16 Tilt Cylinder Assembly (Refer to

"Hydraulic System" Elsewhere) .......... Ref

17 042-0006-02 Clevis Pin .............................................. 1

Rotational Base Assembly

Return To Table Of Contents

SECTION VI

PARTS LIST

13

14

12

4

19

22

23

11

27

26

25

24

26

28

29

30

31

32

33

34

35

33

36

16

9

17

18

15

20

21

3

3

6

1

1 002-0040-00 Power Cord Set Kit ................................ 1

2 015-0002-01 Strain Relief Bushing ............................. 1

3 050-2173-00 Power Cord Bracket ............................... 2

4 042-0009-04 Groove Pin ............................................ 4

5 040-0010-47 Screw ................................................. 13

6 020-0132-00 Rotational Base ..................................... 1

7 016-0001-00 Leveling Screw ...................................... 4

8 050-2174-00 Cable Cover .......................................... 1

9 030-1097-40 Platform Base Weldment ....................... 1

10 015-0008-00 Strain Relief Bushing ............................. 1

11 057-0345-00 Stop Plate Post (Apply Loctite

12 042-0009-01 Groove Pin ............................................ 2

13 040-0250-88 Screw ................................................... 4

14 050-2171-00 Stop Disc .............................................. 1

15 002-0432-00 Bearing Kit (Includes 16 thru 21 [Apply

16 • R501715 • Radial Bearing Washer (Thick)............ 1

17 • R501710 • Thrust Bearing .................................... 1

18 • R501714 • Radial Bearing Washer (Thin).............. 1

19 • R501726 • Table Rotation Bearing ........................ 1

2

#042-0024-02) ..................................... 1

Grease #K902637 to Items 17 & 19]).... 1

5

7

Always Specify Model & Serial Number

10

8

5

MA378500

Item Part No. Description Qty.Item Part No. Description Qty.

20 R501725 Rotation Nut (Apply Loctite

#042-0024-02) ...................................... 1

21 R501709 Retaining Ring ........................................ 1

22 040-0312-44 Screw (Apply Loctite #042-0024-02)..... 2

23 R501708 Rotation Stop Plate (Apply

Grease #K902637)............................... 1

24 050-2193-23 Brake Mounting Bracket ........................ 1

25 040-0375-00 Screw ................................................... 2

26 041-0312-07 Nut ....................................................... 2

27 016-0462-00 Rod End (Male) ..................................... 1

28 016-0464-00 Brake .................................................... 1

29 051-0708-00 Hex Adjuster ......................................... 1

30 016-0463-00 Rod End (Female) ................................. 1

31 042-0001-06 Roll Pin .................................................. 1

32 042-0109-00 Screw ................................................... 1

33 051-0706-40 Top Lever Arm ...................................... 1

34 053-0110-05 Spacer .................................................. 2

35 042-0009-07 Groove Pin ............................................ 2

36 030-0800-02 Lever Arm Weldment ............................. 1

© Midmark Corporation 1997 SF1548 Page 6-16 Printed in U.S.A.

Base Slide Assembly

Return To Table Of Contents

2

SECTION VI

PARTS LIST

1

3

4

5

9

12

11

7

8

10

6

21

12

23

22

7

12

21

14

15

16

17

18

13

029-0069-03 Base Slide Assembly (Includes
1 • 029-0072-05 • Middle Member Assembly (Includes

2 • • 016-0151-00 • • Sprocket (Includes Set Screw).......... 2

3 • • 042-0008-00 • • Machine Key ..................................... 2

4 • • 057-0105-00 • • Axle .................................................. 1

5 • • 016-0149-00 • • Bearing ............................................. 2

6 • • 030-0094-40 • • Middle Member Weldment ................. 1

7 • 029-0070-00 • Chain Assembly .................................. 2

8 • 040-0008-30 • Screw ............................................... 10

9 • 045-0001-10 • Lockwasher ...................................... 10

10 • 052-0015-00 • Spacer .............................................. 10

11 • 030-0092-41 • L.H. Support Channel Weldment .......... 1

Items 1 thru 22)..................................... 1

Items 2 thru 6)..................................... 1

Always Specify Model & Serial Number

20

19

MA378600

Item Part No. Description Qty.Item Part No. Description Qty.

12 • 040-0375-00 • Screw ............................................... 12

13 • 029-0071-05 • Idler Adjuster Assembly (Includes

Items 14 thru 18)................................. 1

14 • • 030-0274-00 • • Journal Weldment ............................. 1

15 • • 016-0152-00 • • Sprocket (Includes Item 17) .............. 2

16 • • 040-0250-04 • • Set Screw ......................................... 4

17 • • • 016-0149-00 • • • Bearing ........................................... 2

18 • • 030-0273-40 • • Idler Adjuster Weldment .................... 1

19 • 016-0234-01 • L.H. Base Slide (Opposite) .................. 1

• 016-0234-00 • R.H. Base Slide (Shown) ..................... 1

20 • 030-0092-40 • R.H. Support Channel Weldment ......... 1

21 • 040-0250-88 • Screw ............................................... 20

22 • 030-0917-42 • Inner Member Weldment ..................... 1

23 061-0045-00 Cover Caution Label .............................. 2

© Midmark Corporation 1997 SF1548 Rev. 12/02 Page 6-17 Printed in U.S.A.

Base Electrical Components

Return To Table Of Contents

2

5

4

SECTION VI

PARTS LIST

1

17

15

16

28

27

14

11

3

7

25

26

8

30

9

23

24

30

28

29

6

11

10

16

27

31

12

13

21

19

20

22

18

Item Part No. Description Qty.Item Part No. Description Qty.

1 Motor / Pump (Refer to "Motor / Pump

Assembly" Elsewhere) ......................... 1

2 041-0250-13 Nut ....................................................... 8

3 053-0051-00 Motor Mount (Apply Loctite 042-0024-02) 4

4 050-1533-40 Control Cover ........................................ 1

5 040-0010-34 Screw ................................................... 2

6 050-1532-40 Control Panel......................................... 1

7 053-0068-09 Snap Bushing ........................................ 2

8 002-0041-00 Time Delay Relay Kit ............................. 1

9 045-0001-21 Washer ................................................. 1

10 040-0006-11 Screw ................................................... 1

11 041-0006-01 Nut ....................................................... 3

12 015-0009-01 Terminal Block ...................................... 1

13 015-0022-01 Jumper [Not Shown] (Refer to "Wiring

Diagram" Elsewhere {Section 5})........ Ref

14 040-0006-33 Screw ................................................... 2

15 053-0068-06 Snap Bushing ........................................ 1

16 040-0010-47 Screw ................................................... 5

Always Specify Model & Serial Number

© Midmark Corporation 1997 SF1548 Page 6-18 Printed in U.S.A.

17 002-0040-00 Power Cord Set Kit ................................ 1

18 061-0295-00 Cord Tag............................................... 1

19 Base Assembly (Refer to "Rotational

Base Assembly" Elsewhere) .............. Ref

20 045-0001-31 Lockwasher .......................................... 3

21 Wire Assembly (Refer to "Wiring

Diagram" Elsewhere {Section 5})........ Ref

22 015-0014-01 Wire Clip................................................ 1

23 015-0001-00 Wire Clip................................................ 2

24 040-0010-04 Screw ................................................... 3

25 025-0025-00 Extension Spring ................................... 1

26 Power Cables (Refer to "Wiring

Diagram" Elsewhere) ......................... Ref

27 040-0010-28 Screw ................................................... 4

28 002-0044-00 Capacitor Kit (124/149 MFD {250V})...... 2

29 015-0413-01 Capacitor Cap ....................................... 2

30 015-0412-02 Capacitor Mounting Bracket .................. 2

31 041-0010-02 Nut ....................................................... 4

MA378700

Motor / Pump Components

Return To Table Of Contents

6

SECTION VI

PARTS LIST

4

11

10

14

5

9

8

1

3

2

13

12

7

11

15

19

18

1 002-0444-00 Motor / Pump Assembly (Includes

Items 2 thru 13)..................................... 1

2 • 014-0169-00 • Motor Shaft Seal (Not Shown) ............. 1

3 • 014-0262-02 • O-Ring (Not Shown)............................ 1

4 • 014-0248-00 • Relief Valve (Low Pressure) ................ 1

5 • 014-0249-00 • Relief Valve (High Pressure) ............... 1

6 • 014-0262-01 • Filler Cap............................................. 1

7 • 014-0168-00 • Shuttle Valve ....................................... 2

8 • 014-0260-00 • Elbow .................................................. 1

9 • 014-0096-00 • Elbow .................................................. 2

Always Specify Model & Serial Number

16

17

MA531100

Item Part No. Description Qty.Item Part No. Description Qty.

10 • 002-0038-00 • Anticavitation Solenoid Valve ............... 1

11 • 014-0045-00 • Connector ........................................... 1

12 • 014-0020-00 • Mineral Oil ......................................... AR

13 • 014-0007-00 • Pipe Sealant ...................................... AR

14 061-0135-00 Motor Caution Label .............................. 1

15 015-0018-03 Spring Spade Terminal .......................... 5

16 050-2662-40 Motor Base ............................................ 1

17 040-0500-02 Screw ................................................... 2

18 045-0001-33 Lockwasher .......................................... 2

19 016-0360-00 Trim Lock (Specify Length - 2") ............. 2

© Midmark Corporation 1997 SF1548 Rev. 5/00 Page 6-19 Printed in U.S.A.

Foot Control Assemb ly

Return To Table Of Contents

2

3

1

11

16

17

5

6

7

12

SECTION VI

PARTS LIST

13

14

4

9

27

15

8

18

19

10

5

015-0606-03 Foot Control Assembly (Includes

Items 1 thru 21)..................................... 1

1 • 002-0045-00 • Switch ................................................. 8

2 • 045-0001-07 • Washer ............................................. 16

3 • 041-0003-00 • Nut .................................................... 16

4 • 052-0076-00 • Spacer ................................................ 4

5 • 040-0010-04 • Screw .................................................. 6

6 • 025-0009-00 • Spring ................................................. 8

7 • 052-0010-00 • Spacer ................................................ 8

8 • 020-0144-03 • Foot Control Casting ........................... 1

9 • 052-0075-00 • Spacer ................................................ 4

10 • 050-0957-00 • Strain Relief Bracket............................ 1

11 • 040-0003-00 • Screw ............................................... 16

12 • 050-3258-00 • Step Mount .......................................... 4

13 • 053-0154-00 • Foot Tread .......................................... 4

14 • 050-0941-04 • Pedal ................................................... 4

20

Always Specify Model & Serial Number

21

26

24

25

23

22

Item Part No. Description Qty.Item Part No. Description Qty.

15 • 061-0465-00 • Decal .................................................. 1

16 • 045-0001-08 • Washer ............................................... 4

17 • 040-0010-36 • Screw ................................................. 4

18 • 053-0156-00 • Glide ................................................... 6

19 • 040-0010-35 • Screw ................................................. 4

20 • 040-0010-52 • Screw ................................................. 8

21 • 015-0008-00 • Strain Relief Bushing ........................... 1

22 040-0010-04 Screw ................................................... 2

23 040-0010-47 Screw ................................................... 7

24 045-0001-08 Lockwasher .......................................... 2

25 050-0942-00 Wire Channel Cover .............................. 1

26 Ground Wire (Refer to "Wiring
27 002-0048-00 Foot Control Cord (Refer to "Wiring

28 002-0491-00 Footswitch Cover Kit (Not Shown)......... 1

Diagram" {Section 5}) ......................... Ref

Diagram" {Section 5}) ......................... Ref

MA378900

© Midmark Corporation 1997 SF1548 Page 6-20 Printed in U.S.A.

COMMENTS

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The Technical Publications Department of Midmark
Corporation tak es pride in its publications. W e are sure
that our manuals will fill all of your needs when you are
performing scheduled maintenance, servicing, or
repairs on a Midmark product.

Page(s) and Paragraph(s) Needing Changed:

Description of Error or Desired Change:

However, if you find any errors or feel that there should
be a change, addition, or deletion to a manual, please
let us know!

Please fax or mail a copy of this completed comment
sheet to:

Midmark Corporation
ATTN: Te ch ni cal Publicatio ns Depa rtment
60 Vista Drive
Versailles, Ohio 45380
Fax: [phone]

© Midmark Corporation 2000 SF-1621 Page 7-1 Printed in U.S.A.

FAX ORDERING FORM

Return To Table Of Contents

(SERVICE PARTS ONLY)

NOTES:

• ALL BLOCKED AREAS MUST BE COMPLETED.

• USE FOR NON-WARRANTY FAX ORDERS ONLY. WARRANTY ORDERS MUST BE TELEPHONED IN (1-800-MIDMARK).

ATTENTION: SERVICE DEPARTMENT FAX#: [phone]

ACCT #: P.O. #: DATE:
NAME: SHIP TO:

ADDRESS:

CITY, ST.:

CONTACT:

PHONE:

NON-EMERGENCY ORDER - TO SHIP WITHIN 72 HOURS IF
PART(S) IN STOCK.

EMERGENCY ORDER - TO SHIP WITHIN 24 HOURS IF PART(S)
IN STOCK (IF ORDER IS RECEIVED BEFORE 1:30 P.M. E.S.T).

SEND NOTIFICATION IF PARTS ARE NOT AVAILABLE TO SHIP
WITHIN 24 HOURS VIA
E-MAIL OR FAX TO:

METHOD OF SHIPMENT

UPS

NEXT DAY A.M.
NEXT DAY P.M.
2ND DAY
GROUND

FED EX

NEXT DAY A.M.
NEXT DAY P.M.

2ND DAY
ECONOMY

OTHER

QTY. PART # DESCRIPTION (SPECIFY COLOR OF ITEM IF APPLICABLE) COLOR CODE PRICE/PER

© Midmark Corporation 2000 Rev. 1/03 Page 7-2 Printed in U.S.A.

TOTAL COST: $

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Midmark Corporation

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60 Vista Drive
P.O. Box 286
Versailles, Ohio 45380-0286
937-526-3662
Fax [phone]
midmark.com

© Midmark Corporation - 2003 Printed in U.S.A.

Subject To Change Without Notice