When contacting UpRight for service or parts
information, be sure to include the MODEL and
SERIAL NUMBERS from the equipment nameplate. Should the nameplate be missing, the
SERIAL NUMBER is also stamped on top of the
chassis above the front axle pivot.
Call Toll Free in U.S.A.
1-800-926-LIFT
Upright, Inc.
1775 Park Street
Selma, California 93662
TEL: 559/891-5200
FAX: 559/891-9012
PARTS: 1-888-UR-PARTS
PARTSFAX: 559/896-9244
P/N 060587-025
B 3/00 .5 K
Stamped
Serial
Number
Page 3
OW TOUSETHISMANUAL
H
F
ORWARD
This manual is divided into 6 sections. The section
number printed at the top corner of each page can be
used as a quick reference guide.
Special information
!
Indicates the hazard or unsafe practice will
result in severe injury or death.
!
Indicates the hazard or unsafe practice could
result in severe injury or death.
Indicates the hazard or unsafe practice could
result in minor injury or property damage
NOTES: Give helpful information.
DANGER
WARNING
CAUTION
!
!
!!
Introduction &
Specifications
General description and machine
specifications.
Machine Preparation &
Operation
Information on how to operate the work
platform and how to prepare it for operation.
Maintenance
Preventative maintenance and service
information.
1.0
2.0
3.0
ORKSHOPPROCEDURES
W
CAUTION: Detailed descriptions of standard work-
shop procedures, safety principles and service operations are not included. Please note that this manual
does contain warnings and cautions against some
specific service methods which could cause personal
injury, or could damage a machine or make it unsafe.
Please understand that these warnings cannot cover
all conceivable ways in which service, whether or not
recommended by UpRight, Inc., might be done, or of
the possible hazardous consequences of each conceivable way, nor could UpRight Inc. investigate all
such ways. Anyone using service procedures or
tools, whether or not recommended by UpRight Inc.,
must satisfy themselves thoroughly that neither personal safety nor machine safety will be jeopardized.
All information contained in this manual is based on
the latest product information available at the time of
printing. We reserve the right to make changes at
any time without notice. No part of this publication
may be reproduced, stored in retrieval system, or
transmitted, in any form by any means, electronic,
mechanical, photocopying, recording, or otherwise,
without the prior written permission of the publisher.
This includes text, figures and table.
The purpose of this service and parts manual is to
provide instructions and illustrations for the operation
and maintenance of an UpRight SL26/30SL Work
Platform manufactured by UpRight, Inc. of Selma,
California.
Scope
The manual includes procedures for proper operation, maintenance, adjustment, and repair of this
product as well as recommended maintenance
schedules and troubleshooting.
1.2G
ENERAL DESCRIPTION
The SL26/30SL Work Platform consists of the platform, controller, elevating assembly, leveling system,
power module, control module, and chassis
(Figure 1-1).
Platform
The platform has a reinforced wood floor, 43.5 inch
(1.11 m) high guardrails with midrail, 6 inch (152 mm)
toeboards and an entrance gate at the rear of the
platform. The guardrails can be folded down for
access through doors or for shipment, except when
equipped with the optional roll-out deck extension.
Controller
The controller contains the controls to operate the
machine. It should be hung on the front, left, or right
guardrail, but may be hand held if necessary. To
operate the machine, the interlock lever must be
depressed to operate any function. A complete explanation of control functions can be found in Section 2.
Elevating Assembly
The platform is raised and lowered by the elevating
assembly, a two section arm pivoting on a gear, and
powered by a single stage lift cylinder. The hydraulic
pump, driven by the engine, actuates the cylinder.
Solenoid operated valves control raising & lowering.
Power Module
The power module contains the engine, hydraulic
pump, fuel tank, battery, and starter solenoid.
Control Module
The control module contains the hydraulic tank,
hydraulic valve manifold, horn/alarms, volt/hour
meter, electrical terminal strips, and chassis controls.
A complete explanation of the chassis control functions is found in Section 2.
Leveling System
The base of the elevating assembly is mounted on
two pivots. Hydraulic cylinders at the side and rear of
the elevating assembly tilt the elevating assembly
and platform side to side or fore and aft. Instructions
for leveling the platform and elevating assembly are
found in Section 2.
Chassis
The chassis is a structural frame that supports all the
components of the SL26/30SL Work Platform.
Purpose of Equipment
The SL26/30SL Work Platform is designed to elevate
personnel and materials to overhead work areas and
be driven with the platform elevated on firm, level surfaces only.
Note: Travel with the platform raised is limited to
a creep speed range and will only travel if the
platform is less than 8 meters high
Special Limitations
The objective of the SL26/30SL is to provide a
quickly deployable, self-propelled, variable height
work platform for worksite use that can be driven over
rough terrain.
WARNING
!!
DO NOT use the maintenance platform without
guardrails properly assembled and in place with
fasteners properly torqued.
DANGER
!
!
The elevating function shall ONLY be used
when the work platform is level and on a firm
surface. The work platform is NOT intended to
be driven over uneven, rough or soft terrain
when elevated.
Page 10
1-2SL26/30SL Work Platform
I
NTRODUCTION
& S
PECIFICATIONS
Section
1.2
Figure 1-1: SL26/30SL Work Platform
1. Platform
2. Controller Assembly
3. Elevating Assembly
4. Power Module
5. Control Module
6. Chassis
7. Leveling System
1
2
3
4
5
6
7
Page 11
SL26/30SL Work Platform1-3
I
NTRODUCTION
& S
PECIFICATIONS
Section
1.3
1.3S
PECIFICATIONS
Table 1-1: Specifications
Specifications are subject to change without notice
Meets or exceeds all applicable National Safety requirements.
ITEMSL26SLSL30SL
Platform Size (Inside Toeboards)
Standard1,71 m x 3,59 m [67.5 in. x 141.5 in.]1,71 m x 4,22 m [67.5 in. x 166.5 in.]
Slide Out Deck Extended1,71 m x 4,61 m [67.5 in. x 181.5 in.]N/A
Max. Platform Capacity
Standard680 kg [1,500 lbs.]590 kg [1,300 lbs.]
w/ Extension680 kg [1,500 lbs.]N/A
On Extension227 kg [500 lbs.]N/A
Max. No. of occupants
Standard5 people5 people
on Extension2 peopleN/A
Height
Working Height9,75 m [32 ft.]10,97 m [36 ft.]
Max. Platform Height7,93 m [26 ft.]9,14 m [30 ft.]
Min. Platform Height1.5 m [59 in.]1.5 m [59 in.]
Max. Drive Height7,93 m [26 ft.]9,14 m [30 ft.]
Dimensions
WeightDiesel: 3,075 kg [6,780 lbs.]Diesel: 3,216 kg [7,090 lbs.]
Overall Width, Standard2,13 m [84 in.]2,13 m [84 in.]
Overall Height2,6 m [102.5 in.]2,6 m [102.5 in.]
Overall Length, Standard3,79 m [149 in.]4,39 m [173 in.]
Surface Speed
Platform Lowered0 to 5.0 km/h [0 to 3.1 mph]0 to 5.0 km/h [0 to 3.1 mph]
Platform Raised0 to 0.8 km/h [0 to 0.5 mph]0 to 0.8 km/h [0 to 0.5 mph]
Tires (Standard)26 x 12.00 - 12 NHs Super Terra-grip with Trac Seal26 x 12.00 - 12 NHs Super Terra-grip with Trac Seal
Parking BrakesDual Spring Applied, Hydraulic Release, multi-discDual Spring Applied, Hydraulic Release, multi-disc
Turning Radius (inside)3,96 m [13 ft.]3,96 m [13 ft.]
Maximum Gradeability35% [19°]35% [19°]
Wheel Base2,54 m [100 in.]2,54 m [100 in.]
Guardrails1,11 m [43.5 in.] high, Fold Down with gate.1,11 m [43.5 in.] high, Fold Down with gate.
Toeboard152 mm [6 in.] High152 mm [6 in.] High
Fuel Tank Capacity45.5 l [12 US Gallons]45.5 l [12 US Gallons]
Page 12
1-4SL26/30SL Work Platform
I
NTRODUCTION
& S
PECIFICATIONS
Section
1.3
N
OTES
:
Page 13
SL26/30SL Work Platform2-1
Section 2
M
ACHINE
P
REPARATION
& O
PERATION
All personnel shall carefully read, understand and follow all safety rules, operating instructions
before operating or performing maintenance on any Upright aerial work platform.
NEVER
operate the machine within
ten feet of power lines.
THIS MACHINE IS NOT INSULATED.
NEVER
elevate the platform or drive
elevated on uneven slopes or soft
ground unless the platform is level.
NEVER
sit, stand or climb on guard-
rail or midrail.
Safety Rules
Warning
N
EVER
operate the machine without first surveying the work area for surface hazards such as holes, drop-offs, bumps
and debris.
N
EVER
operate the machine if all guardrails are not properly in place and secured with all fasteners properly torqued.
S
ECURE
and lock gate after mounting platform.
K
EEP
all body parts clear of outriggers when extending or retracting (outrigger equipped machines only).
N
EVER
use ladders or scaffolding on the platform.
N
EVER
attach overhanging loads or increase platform size.
L
OOK
up, down and around for overhead obstructions and electrical conductors.
D
ISTRIBUTE
all loads evenly on the platform. See the back cover for maximum platform load.
N
EVER
use damaged equipment. (Contact UpRight for instructions. See toll-free phone number on back cover.)
N
EVER
change operating or safety systems.
I
NSPECT
the machine thoroughly for cracked welds, loose hardware, hydraulic leaks, damaged control cable, loose wire
connections and wheel bolts.
N
EVER
climb down elevating assembly with the platform elevated.
N
EVER
perform service on machine while platform is elevated without blocking elevating assembly.
N
EVER
recharge battery near sparks or open flame; batteries that are being charged emit highly explosive hydrogen gas.
A
FTER USE
secure the work platform against unauthorized use by turning key switch off and removing key.
N
EVER
replace any component or part with anything other than original UpRight replacement parts without the manu-
facturer's consent.
Page 14
2-2SL26/30SL Work Platform
M
ACHINE
P
REPARATION
& O
PERATION
Section
2.1
NOTE: Read and familiarize yourself with all oper-
ating instructions before attempting to operate
the SL26/30SL Work Platform.
2.1P
REPARATION FOR USE
1. Remove the metal banding from the module covers and elevating linkage.
2. Remove the banding from the control console.
3. Remove tie wraps holding guardrail gate.
4. Connect the negative (-) lead to the negative (-)
battery terminals in power module. (Figure 2-1)
5. Close the Emergency Lowering Valve, if necessary. (Figure 2-2)
6. Fill fuel tank.
Figure 2-1: Battery
Figure 2-2: Emergency Lowering Valve
2.2F
ORKLIFTING WORK PLATFORM
Note: Forklifting is for transporting only.
Forklift from sides of the platform by lifting under the
modules (Figure 2-3).
Figure 2-3: Transporting Work Platform
CAUTION
!!
STAND CLEAR when cutting the metal banding
to avoid being cut if the banding snaps back.
Negative Battery Terminal
WARNING
!
!
See specifications for weight of work platform
and be certain that forklift is of adequate
capacity to lift the platform
Front
Tie Downs
&
Lifting
Forklift
Typical Rear
Lifting Lug
Rear Tiedowns
Lugs
Page 15
SL26/30SL Work Platform2-3
M
ACHINE
P
REPARATION
& O
PERATION
Section
2.3
2.3T
RANSPORTING WORK PLATFORM
1. Maneuver the work platform into transport position and chock wheels.
2. Secure the work platform to the transport vehicle
with chains or straps of adequate load capacity
attached to the chassis tie down/lifting lugs (Figure 2-3).
3. open the emergency lowering valve.
2.4P
REPARATION FOR SHIPMENT
1. Grease all the grease fittings (see Section 3).
2. Fully lower the platform.
3. Disconnect the battery negative (-) lead from the
battery terminal(s) (Figure 2-1).
4. Band the controller to the front guardrail.
5. Band the elevating linkage to the frame just
behind the front wheels and at the rear wheels
6. Open the Chassis Emergency Lowering Valve.
(Figure 2-2)
2.5S
TORAGE
No preparation for storage is required when the work
platform is in normal usage. Regular maintenance
procedures should continue to be performed (see
Section 3).
If the work platform is to be placed in long term storage (dead storage), follow the recommended preservation procedures, below.
Preservation
1. Clean painted surfaces. If the paint is damaged,
repaint.
2. Fill the hydraulic tank to operating level, fluid will
be visible at the Sight Gauge. DO NOT fill the
hydraulic tank while the platform is elevated.
Note: DO NOT drain the hydraulic system prior to
long term storage.
3. Coat exposed portions of extended cylinder rods
with a preservative such as multipurpose grease
and wrap with barrier material.
4. Coat all exposed unpainted metal surfaces with
preservative.
5. Service the diesel engine according to the manufacturers recommendations.
Battery
1. Disconnect the battery ground cable and secure
to the chassis.
2. Disconnect the remaining battery lead and
secure to the chassis.
3. Remove the battery and place in alternate service.
2.6D
ESIGN FEATURES
The SL26/30SL has the following features:
• The drive speed is limited to creep speed when
operating the work platform while platform is elevated.
• The platform descent rate is controlled by an orifice
(fixed speed) and is slowed further by another orifice during the last 304 mm (12 in.) of descent
(cushion speed). The lift cylinder is equipped with
a velocity fuse to prevent descent should the lift
hose rupture.
• The front floating axle locks into position upon ele-
vating the platform.
• The machine will not drive while elevated unless
the front axle is parallel with the rear axle.
• An alarm sounds and the drive and lift coils are de-
energized if the platform should become unlevel
while elevated.
• Parking brakes are automatically engaged when
the Control Lever is released and the machine
comes to a full stop.
• The Controller and chassis controls are equipped
with Emergency Stop Switches for stopping all
powered functions.
• The Interlock Lever must be depressed for the
Controller to function.
• An alarm is provided to signal when the platform is
lowering.
• A lift switch is located in the Control Module on the
Chassis for lifting and lowering the platform from
ground level.
• An Emergency Down Valve is provided in the Con-
trol Module, to lower the platform in the event electrical power is lost.
• Machine will not level above 87 in., interlock height.
• Machine will not travel when elevated above 8 m.
CAUTION
!!
The rear chassis tie down lugs are not to be
used for lifting the work platform.
Overtightening of chains or straps through tie
down lugs may result in damage to work platform.
Page 16
2-4SL26/30SL Work Platform
M
ACHINE
P
REPARATION
& O
PERATION
Section
2.7
2.7THE C
ONTROLS AND INDICATORS
The controls and indicators for operation of the SL26/
30SL Work Platform are shown in Figure 2-4. The
name and function of each control and indicator are
listed in Table 2-1. The index numbers in Figure 2-4
correspond to the index numbers in Table 2-1. The
operator shall know the location of each control and
indicator and have a thorough knowledge of the function and operation of each before attempting to operate the unit.
Table 2-1: Controls and Indicators
Controller/PlatformChassis
INDEX #NAMEFUNCTIONINDEX #NAMEFUNCTION
1KEY SWITCH
Turn key fully clockwise to provide power to the Interlock
Switch. Turn the key fully clockwise to start engine.
When released, key goes to RUN to provide power to the
Interlock Switch.
11HOUR METERShows hours machine has been powered on.
2
EMERGENCY
STOP SWITCH
Push red button to cut power to all controls (off). Turn
clockwise to provide power (on).
12
CHASSIS
EMERGENCY
STOP SWITCH
Push red button to cut power to all controls (off). Turn
clockwise to provide power (on).
3JOYSTICK
Move joystick for ward or backwards to control Drive and
Lift Valves proportionally or Down Valve depending on
position of Drive Lift Switch.
13
CHASSIS LIFT
SWITCH
Push switch up to lift the platform and push switch down
to lower the platform.
4
STEERING
SWITCH
Moving the momentary rocker switch Right or Left
steers the work platform in that direction. Although the
Steering Switch is self centering the steering system is
not. The wheels must be steered back to straight.
15
EMERGENCY
LOWERING
VALVE
Push in and turn knob 1/4 turn counterclockwise, the
knob will pop out and the platform will lower. To close,
push in and turn knob 1/4 turn clockwise until detent
engages. The platform cannot be raised until this valve is closed.
5
DRIVE SPEED/
TORQUE
SELECTOR
SWITCH
Provides two speed/torque ranges, in forward or reverse.
High Speed-low torque and
High Torque-low speed.
17
BRAKE RELEASE
PUMP
Releases the parking brake allowing the machine to be
moved in the event power is lost or for winching onto a
trailer.
6
LEVEL/DRIVE/
LIFT SWITCH
Selecting LEVEL allows the platform to be leveled using
the tilt switches. Selecting DRIVE allows the work
platform to move forward or reverse. Selecting LIFT
allows the work platform to raise or lower.
18BUBBLE LEVEL
Indicates platform is level when bubble is within the
circle.
7
SIDE/SIDE TILT
SWITCH
Pushing the switch either right or left tilts the platform in
that direction.
19
CHASSIS KEY
SWITCH
Switches lift control from platform to chassis.
8
FORE/AFT
SWITCH
Pushing the switch either forward or rearward tilts the
platform in that direction.
20LEVEL SENSORStops machine operation when out of level
9
INTERLOCK
LEVER
SWITCH
Provides power to the Controller powered functions, only
when depressed, preventing accidental activation of the
Controller.
10
GLOW PLUG
BUTTON (Diesel
models only)
When engine is cold, depress & hold the Glow Plug
button for 6 (six) seconds prior to starting engine.
Page 17
SL26/30SL Work Platform2-5
M
ACHINE
P
REPARATION
& O
PERATION
Section
2.7
Figure 2-4: Controls & Indicators
6
7
8
4
9
3
5
1
2
12
20
11
13
9
18
17
15
Page 18
2-6SL26/30SL Work Platform
M
ACHINE
P
REPARATION
& O
PERATION
Section
2.8
2.8I
NTRODUCTION
General Functioning
The engine directly drives a hydraulic pump. The
pump supplies oil under pressure to operate all the
work platform functions. The oil flow is directed to the
different functions by electrically activated solenoid
valves.
Driving
With the Controller Key Switch ON, and the engine
running, both chassis and controller Emergency Stop
Switches ON, the Interlock Lever depressed, and the
Drive/Lift Switch on DRIVE, the machine will drive
forward or reverse at a speed proportional to the
angle the control lever is pushed or pulled.
Driving with the Platform Lowered
Selecting HIGH SPEED with the Drive Speed Switch
and moving the Control Lever forward or reverse with
the platform fully lowered will energize the cutout
relay thru the Platform Down Relay contacts, the
Series/Parallel Coils, the Proportional Coil and the
Forward or Reverse Coil to allow oil to flow into the
Parking Brake (releasing the Brake) and serially
through the Hydraulic Motors. The Proportional Valve
closes or opens in proportion to the movement of the
Control Lever (from center). As the Proportional
Valve closes, more oil is allowed to flow to the Forward or Reverse Valve increasing drive speed.
Selecting HIGH TORQUE (low speed) with the Drive
Speed Switch the Series/Parallel Valves are not
energized, allowing the oil to divide through the
Hydraulic Motors producing the high torque/low drive
speed.
Driving with the Platform Elevated
Raising the platform (see RAISING AND LOWERING
THE PLATFORM, below) opens the Platform Down
Switch which cuts power to the Platform Down Relay.
This energizes the cutout relay thru the tilt sensor
and prevents the axle float valve solenoid from energizing, locking the axle in place. Also de-energized
are the Series/Parallel coils and the controller high
speed circuit. When raised, the platform will only
drive at low speed (motors in parallel) and then only
if the front axle parallel with the rear axle and the
platform is level.
Steering
On the top of the Control Lever is a momentary
rocker switch for steering the machine left and right.
Pressing the right or left side of the rocker switch will
energize the Steering Coils and allow oil to flow
through the Steering Valve to the Steering Cylinder.
Releasing the rocker switch de-energizes the Steering Coils and holds the Steering Cylinder in position.
The Steering Cylinder will not automatically
return to center. The Steering Switch must be
activated to change the wheels direction.
Leveling
With the controller key switch ON (and the engine
running), both chassis and controller emergency stop
switches ON, and the Level/Drive/Lift switch on
LEVEL, the machine can be tilted right or left with the
side/side switch forward and backward with the fore/
aft switch to allow centering of the platform bubble
indicator. The side/side switch and the fore/aft switch
energize the steering bypass coil, to direct oil to the
tilt valves, and the tilt valves directing oil to the right/
left tilt cylinder and fore/aft tilt cylinder, respectively.
Raising And Lowering The Platform
With the Controller Key Switch ON (and the engine
running), both chassis and controller Emergency
Stop Switches ON, the Interlock Lever depressed,
and the Drive/Lift Switch on LIFT, the machine will
elevate at a speed proportional to the angle the Control Lever is pushed forward.
Pushing forward on the Control Lever energizes the
Cutout Relay thru the tilt sensor, Proportional Coil,
Up Coil and accelerator or throttle relay to increase
the engine speed. The greater the angle (from center) of the Control Lever the more the Proportional
Valve closes. As the Proportional Valve closes more
oil is allowed to flow through the Lift Valve to the Lift
Cylinder increasing lift speed.
Lowering the platform electrically energizes the
Down Alarm and the Down Coil. This allows the oil to
flow out of the Lift Cylinder through an orifice, which
controls the rate of descent, then back to tank. During the last 304 mm (12 in.) of lowering the Cushion
Down Valve is energized forcing the oil thru another
orifice slowing the platform rate of descent. Lowering
the platform manually with the Emergency Down
Valve allows the oil to flow out of the Lift Cylinder in
the same manner but there is no Down Alarm.
Page 19
SL26/30SL Work Platform2-7
M
ACHINE
P
REPARATION
& O
PERATION
Section
2.9
2.9S
AFETY RULES AND PRECAUTIONS
Always observe the following safety rules and
precautions when using the SL26/30SL Work
Platform:
NEVER operate the machine within ten feet of power lines (THIS MACHINE IS NOT INSULATED).
NEVER elevate the platform or drive the machine
while elevated unless the machine is on a firm, level
surface.
NEVER sit, stand or climb on guardrail or midrail.
NEVER operate the machine without first surveying
the work area for surface hazards such as holes,
drop-offs, bumps and debris.
NEVER operate the machine if all guardrails are not
properly in place and secured with all fasteners properly torqued.
SECURE gate across entrance after mounting the
platform.
NEVER use ladders or scaffolding on the platform.
NEVER attach overhanging loads or increase the
size of the platform.
LOOK up, down and around for overhead obstruc-
tions and electrical conductors.
CHECK all four tires for correct inflation, 3.4 bar (50
psi).
DISTRIBUTE all loads evenly on the platform. (For
maximum platform load, refer to Table 1-1).
NEVER use damaged equipment. (Contact UpRight
for instructions.)
NEVER change operating or safety systems.
INSPECT the machine thoroughly for cracked welds,
loose hardware, hydraulic leaks, damaged control
cable, loose wire connections and tire damage.
NEVER climb down elevating assembly with the platform elevated.
NEVER perform service on machine while platform is
elevated without blocking elevating assembly.
NEVER recharge battery near sparks or open flame;
battery emits highly explosive hydrogen gas when
being charged.
SECURE the work platform against unauthorized use
by turning the key switch off and removing the key
from the key switch when leaving the machine unattended.
NEVER replace any component or part with anything
other than original UpRight replacement parts without the manufacturers consent.
2.10 PRE-O
PERATION INSPECTION
Note: Carefully read, understand and follow all
safety rules, operating instructions, labels and
the Scaffold Industry Association’s MANUAL
OF RESPONSIBILITIES. Perform the following
steps each day before use.
Visual Inspection
1. Remove module covers and inspect for damage,
oil leaks or missing parts.
2. Check the level of the hydraulic oil with the platform fully lowered (see Section 3.6). Oil should
be visible in the sight gauge. Add ISO #46
hydraulic oil, if necessary.
3. Check that the fluid level in the battery is correct
(see Section 3.5).
4. Check the engine oil level and fuel level.
5. Carefully inspect the entire work platform for
damage such as cracked welds or structural
members, loose or missing parts, oil leaks, damaged cables or hoses, loose connections and tire
damage.
6. Check that all guardrails are securely in place
with all fasteners properly torqued.
7. Check tire pressure; 3.4 bar (50 psi).
8. Turn the Chassis Emergency Stop Switch to the
ON position. Turn the red knob clockwise.
9. Diesel Model: While the engine is cool, check
the engine coolant level.
WARNING
!
!
DO NOT perform service on work platform with
the platform elevated unless the elevating
assembly is properly blocked.
WARNING
!!
DO NOT check coolant when engine or radiator
is hot, hot coolant can cause severe burns.
Page 20
2-8SL26/30SL Work Platform
M
ACHINE
P
REPARATION
& O
PERATION
Section
2.10
System Function Inspection
1. Unhook Controller from front guardrail. Firmly
grasp Controller hanger in such a manner that
the Interlock Lever can be depressed, while performing the following checks from the ground.
2. Turn the Emergency Stop Button clockwise or
pull up to the ON position.
3. Turn Controller Key Switch fully clockwise to start
the engine, releasing the key once the engine
starts.
Note: If the engine is cold, depress the glow plug
button for 6 seconds prior to starting to engage
the glow plugs.
4. Position Drive/Lift Switch to DRIVE position.
5. With the Speed Range Switch first in HIGH TORQUE, and then in HIGH SPEED, depress the
Interlock Lever and slowly push the Control Lever
to FORWARD, and then REVERSE positions to
check for speed and directional control. The farther you push or pull the Control Lever, the faster
the machine will travel.
6. Push Steering Switch RIGHT, then LEFT to
check for steering control.
7. Position Level/Drive/Lift Switch to LEVEL. Actu-
ate the fore/aft and side/side switches to verify
that they are functioning properly. Use the side/
side switch and tilt the platform to one side.
8. Rehook controller on front guardrail.
9. Push Chassis Lift Switch to UP position and elevate platform. The platform should only elevate to
the interlock height, about 2.44 m (8 ft.) above the
ground, and the tilt alarm should sound. If the
platform continues to elevate and/or there is no
alarm, STOP and remove the machine from ser-
vice until it is repaired.
10. Lower the platform with the chassis lift switch.
11. Enter the platform. Using the bubble level as a
guide, level the platform with the side/side and
fore/aft switches. Dismount platform.
12. Fully elevate platform using chassis lift switch.
13. Visually inspect the elevating assembly, lift cylinder, cables and hoses for damage or erratic operation. Check for missing or loose parts.
14. Lower the platform partially by pushing Chassis
Lift Switch to DOWN, and check operation of the
audible lowering alarm.
15. Open the Chassis Emergency Lowering Valve,
push in and turn counterclockwise, to check for
proper operation. Once the platform is fully lowered, close the valve, push in and turn clockwise
until the detent engages.
16. Close and secure module covers.
17. Turn the controller key switch counterclockwise to
OFF and push the emergency stop switch button
to OFF.
WARNING
!!
STAND CLEAR of the work platform while performing the following checks.
Before operating the work platform, survey the
work area for surface hazards such as holes,
drop-offs, bumps and debris.
Check in ALL directions, including above the
work platform, for obstructions and electrical
conductors.
Protect control console cable from possible
damage while performing checks.
WARNING
!
!
LOOK up and around for obstructions prior to
operating the lift function.
DO NOT operate the work platform within 10
feet of any electrical power lines. THIS
MACHINE IS NOT INSULATED.
DO NOT elevate the platform unless the work
platform is on firm, level ground.
DO NOT enter the elevating assembly while the
platform is elevated.
Page 21
SL26/30SL Work Platform2-9
M
ACHINE
P
REPARATION
& O
PERATION
Section
2.11
2.11 O
PERATION
Note: Before operating work platform, ensure
that pre-operation has been completed, any
deficiencies have been corrected and the operator has been thoroughly trained on this
machine.
Trav el With Pla tfor m Lowe re d
1. Verify Chassis Emergency Stop Switch is in the
ON position, turn clockwise or pull up on the button.
2. After mounting platform, close and latch gate.
Check that guardrails are in position and properly
assembled with fasteners properly torqued.
3. Check that route is clear of persons, obstructions,
holes and drop-offs, and is capable of supporting
the wheel loads.
4. Check clearances above, below and to the sides
of the platform.
5. Turn Controller Emergency Stop Button clockwise or pull up to the ON position.
6. Turn Controller Key Switch fully clockwise to start
the engine, releasing the key once the engine
starts.
Note: If the engine is cold, depress the glow plug
button for 6 seconds prior to starting to engage
the glow plugs.
7. Set the Level/Drive/Lift Switch to the DRIVE position and the Drive/Lift Speed Range to HIGH TORQUE.
8. Grasp the Control Lever so the Interlock Lever is
depressed (releasing the Interlock Lever cuts the
power to Controller). Slowly push or pull the Control Lever to FORWARD or REVERSE to travel in
the desired direction. The farther you push or pull
the Control Lever from center, the faster the
machine will travel.
9. While moving, push the Drive/Lift Speed Range
Switch to HIGH SPEED for travel on level surfaces or to HIGH TORQUE for climbing grades or
traveling in confined areas.
Steering
1. Push the Steering Switch RIGHT or LEFT to turn
the wheels. Observe the tires while maneuvering
to ensure proper direction.
Note: Steering is not self-centering. Wheels must
be returned to the straight ahead position by
operating the Steering Switch.
Leveling The Platform
Turn Level/Drive/Lift switch to LEVEL. Center bubble
in bubble level using fore/aft and left/right switches.
To level the platform, it may be necessary to elevate
the platform slightly.
Raising and Lowering The Work
Platform
1. Position the Drive/Lift Switch to LIFT.
2. While depressing the Interlock Lever, push the
Control Lever slowly to UP to raise the platform.
Pushing the Control Lever farther increases the
lift speed. If the platform does not elevate above
the interlock height, about 2.44 m (8 ft.), fully
lower platform and re-level.
3. When the work task is completed, position the
Level/Drive/Lift Switch to LIFT and lower the plat-
form by pulling back on the Control Lever until the
platform is fully lowered.
Travel With Work Platform Elevated
Note: The work platform will travel at reduced
speed when in the elevated position. Elevated
drive can be obtained only if both axles are parallel to each other.
1. Check that the route is clear of persons, obstructions, holes and drop-offs and is capable of supporting the wheel loads.
2. Check clearances above, below and to the sides
of platform.
3. Position the Drive/Lift Switch to the DRIVE posi-
tion.
WARNING
!
!
LOOK up and around for obstructions before
performing the lift function.
DO NOT elevate the platform unless the work
platform is on a firm, level surface.
DO NOT operate the work platform within 10
feet of any electrical lines. THIS MACHINE IS
NOT INSULATED.
NEVER enter the Elevating Assembly while the
platform is elevated.
WARNING
!
!
Travel with platform elevated ONLY on firm,
level surfaces.
Page 22
2-10SL26/30SL Work Platform
M
ACHINE
P
REPARATION
& O
PERATION
Section
2.12
4. Push the Control Lever to FORWARD or
REVERSE for the desired direction of travel. If
the machine quits driving and the tilt alarm
sounds, immediately lower and re-level the platform before attempting to elevate again.
Emergency Lowering
Note: The Emergency Lowering Valve is located
on the left hand side of the chassis through the
cutout in the control module cover.
1. Open the Emergency Lowering Valve by pushing
in and turning approximately 1/4 turn, the knob
will pop out disengaging detent (Figure 2-4).
2. Once the platform is fully lowered, be certain that
Emergency Lowering Valve is closed again. The
platform will not elevate if the Emergency Lowering Valve has not been closed.
3. To close the Emergency Lowering Valve, push
the knob in and turn approximately 1/4 turn clockwise until the detent engages.
After Use Each Day
1. Ensure that the platform is fully lowered.
2. Park the machine on level ground, preferably
under cover, secure against vandals, children or
unauthorized operation.
3. Turn the Key Switch to OFF and remove the key
to prevent unauthorized operation.
2.12 B
RAKE RELEASE PUMP
(F
IGURE
2-5)
Perform the following only when the machine will not
operate under it’s own power and it is necessary to
move the machine or when towing the machine up a
grade or onto a trailer to transport.
1. Close the needle valve by turning the knob clockwise.
2. Pump the Brake Release Pump until the Parking
Brake Cylinder Rod clears the wheel rotor.
3. The machine will now roll when pushed or pulled.
4. Be sure to open needle valve and verify that the
cylinder rod has extended before the machine is
operated.
Figure 2-5: Brake Release Pump
CAUTION
!!
Be careful not to over-pump the brake release
pump as damage to the brakes may result.
WARNING
!!
Never operate work platform with the Parking
Brake inoperative. Serious injury or damage
could result.
Never tow faster than .3 m/sec. (1 ft./sec.).
Pump
Needle Valve
Page 23
SL26/30SL Work Platform2-11
M
ACHINE
P
REPARATION
& O
PERATION
Section
2.13
2.13 F
OLD DOWN GUARDRAILS
(F
IGURE
2-6)
This procedure is only for passing through doorways.
Guardrails must be returned to proper position before
using machine.
Fold down Procedure
Note: When performing the following procedures
retain all fasteners.
1. Place Controller on platform deck.
2. Starting at the front of the platform, remove nuts,
bolts and washers from the top of the front guardrail. Fold the front guardrail down onto the platform.
3. Close and latch gate.
4. Remove nuts, bolts and washers from the top of
the rear guardrail. Fold the rear guardrail down
onto the platform being careful to keep latched at
all times.
5. Remove nuts, bolts and washers from the top of
the side guardrails. Lift up and fold one side
guardrail in so it rests on the deck. Repeat with
other side guardrails.
Erection Procedure
1. Raise side guardrails, making sure each is
pushed down to secure the guardrail in the vertical position.
2. Install bolts, washers and nuts between the side
guardrails, tighten securely.
3. Raise rear guardrail assembly, aligning holes and
install bolts, washers and nuts. Tighten securely.
Figure 2-6: Fold Down Guardrails
DANGER
!
!
Before entering platform, guardrails must be
securely fastened in their proper position.
Page 24
2-12SL26/30SL Work Platform
M
ACHINE
P
REPARATION
& O
PERATION
Section
2.13
N
OTES
:
Page 25
SL26/30SL Work Platform3-1
Section 3
M
AINTENANCE
3.1I
NTRODUCTION
This section contains instructions for the maintenance of the SL26/30SL Work Platform. Procedures
for the operation inspection, adjustment, scheduled
maintenance, and repair/removal are included.
Referring to Section 2 will aid in understanding the
operation and function of the various components
and systems of the SL26/30SL work platform, and
help in diagnosing and repair of the machine.
Refer to “Preventative Maintenance Check list” on
page -2 for recommended maintenance intervals.
Note: Unless otherwise specified, torque all fit-
tings according to “Torque Specifications for
Fasteners” on page 3-18, and “Torque Specifications for Hydraulic Components” on
page 3-18.
3.2S
PECIAL TOOLS
The following is a list of special tools which may be
required to perform certain maintenance procedures
on the work platform.
The Complete inspection consists of periodic visual
and operational checks, together with all necessary
minor adjustments to assure proper performance.
Daily inspection will prevent abnormal wear and prolong the life of all systems. The inspection and maintenance schedule is to be performed at regular
intervals. Inspection and maintenance shall be performed by personnel who are trained and familiar
with mechanical and electrical procedures.
The preventative maintenance table has been
designed to be used primarily for machine service
and maintenance repair. Please photocopy the following page and use this table as a checklist when
inspecting the machine for service.
WARNING
!!
Be sure to read, understand and follow all information in the Operation Section of this manual
before attempting to operate or perform service
on any SL26/30SL work platform.
WARNING
!
!
Before performing preventative maintenance,
familiarize yourself with the operation of the
machine.
Always block the elevating assembly whenever
it is necessary to enter the scissor assembly to
perform maintenance while the platform is elevated (Figure 3-1).
Page 26
3-2SL26/30SL Work Platform
M
AINTENANCE
Section
3.3
Preventative Maintenance Table Key
Interval
Daily=each shift or every day
50h/30d=every 50 hours or 30 days
250h/6m=every 250 hours or 6 months
1000h/2y=every 1000 hours or 2 years
Y=Yes/AcceptableN=No/Not Acceptable
R=Repaired/Acceptable
Preventative Maintenance Report
Date: ___________________________________
Owner: _________________________________
Model No: _______________________________
Serial No: _______________________________
Serviced By: _____________________________
Service Interval: __________________________
Table 3-1: Preventative Maintenance Check list
COMPONE NT INSPECTION OR SERVICESINTERVALYNR
Battery
System
Check electrolyte levelDaily
Check specific gravity6m
Clean exterior6m
Check battery cable conditionDaily
Clean terminals6m
Engine Oil
Check level and conditionDaily
Check for leaksDaily
Change oil filter30d
Engine Fuel
System
Check fuel levelDaily
Check for leaksDaily
Replace fuel filter6m
Check air cleanerDaily
Engine
Coolant
Check coolant level (with engine cold)Daily
Replace coolant3m
Hydraulic Oil
Check oil levelDaily
Change filter6m
Drain and replace oil2y
Hydraulic
System
Check for leaksDaily
Check hose connections30d
Check hoses for exterior wear30d
Emergency
Hydraulic
System
Operate the emergency lowering valve and
check for serviceability
Daily
Controller Check switch operationDaily
Control Cable
Check the exterior of the cabl e for pinching,
binding or wear
Daily
Platform Deck
and Rails
Check fasteners for proper torqueDaily
Check welds for cracksDaily
Check condition of deckDaily
Tires
Check for damageDaily
Check lug nuts (torque to 90 ft. lbs.)30d
Hydraulic
Pump
Wipe clean30d
Check for leaks at mating surfaces30d
Check for hose fitting leaksDaily
Check mounting bolts for proper torque30d
Drive Motors Check for operation and leaksDaily
Steering
System
Check hardware & fittings for proper torque6m
Grease pivot pins30d
Oil king pins30d
Check steering cylinder for leaks30d
Elevating
Assembly
Inspect for structural cracksDaily
Check pivot points for wear30d
Check mounting pin pivot bolts for proper
torque
30d
Check linkage gear for wear.6m
Check elevating arms for bending6m
Grease linkage pins30d
Grease linkage gear30d
Chassis
Check hoses for pinch or rubbing pointsDaily
Check component mounting for proper
torque
6m
Check welds for cracksDaily
Lift Cylinder
Check the cylinder rod for wear30d
Check mounting pin pivot bolts for proper
torque
30d
Check seals for leaks30d
Inspect pivot points for wear30d
Check fittings for proper torque30d
Fore/Aft
Cylinder &
Side/Side
Cylinder
Check the cylinder rod for wear.30d
Check mounting pin pivot bolts for proper
torque
30d
Check seals for leaks30d
Inspect pivot points for wear.30d
Check fittings for proper torque30d
Axle Cylinder
Check the cylinder rod for wear.30d
Check mounting pin pivot bolts for proper
torque
30d
Check seals for leaks30d
Inspect pivot points for wear30d
Check fittings for proper torque30d
Entire Unit
Check for and repair collision damageDaily
Check fasteners for proper torque3m
Check for corrosion-remove and repaint6m
Lubricate30d
Labels
Check for peeling, missing, or unreadable
labels & replace
Daily
Bubble Level
Check bubble level and target ring for
damage
Daily
Wheel
Bearings
Check wheel assembly for play30d
Repack wheel bearings (replace wheel
bearings and seals at 2000 hours).
2y
COMPONENT INSPECTION OR SERVICESIN TERVALYNR
Page 27
SL26/30SL Work Platform3-3
M
AINTENANCE
Section
3.4
3.4B
LOCKING ELEVATING ASSEMBLY
(F
IGURE
3-1)
Installation
1. Park the work platform on firm, level ground and
leave the engine running.
2. Open control module cover.
3. Turn Chassis Emergency Stop Button clockwise
to the ON position.
4. Position Chassis Lift/Lower to UP and elevate
platform approximately 305 mm (12 inches).
5. Place a jackstand with a minimum rating of 1814
kg (4000 lbs.) between the lower mast and chas-
sis, just behind the front axle.
6. Push Chassis Lift Switch to DOWN position and
gradually lower platform until jackstand is
secured tightly between lower mast and Chassis.
Figure 3-1: Blocking Elevating Assembly
Removal
1. Push Chassis Lift Switch to UP position and gradually raise platform until jackstand can be
removed.
2. Remove jackstand.
3. Push Chassis Lift Switch to DOWN position and
completely lower platform.
3.5B
ATTERY MAINTENANCE
Battery Inspection & Cleaning
Check battery fluid level daily, especially if work platform is being used in a warm, dry climate. If required,
add distilled water ONLY. Use of tap water with high
mineral content will shorten battery life.
The battery and cables should be inspected regularly
for signs of cracks in the case, electrolyte leakage
and corrosion of the terminals. Inspect cables for
worn spots or breaks in the insulation and for broken
cable terminals.
Clean the battery when it shows signs of corrosion at
the terminals or when electrolyte has overflowed during charging. Use a baking soda solution to clean the
battery, taking care not to get the solution inside the
cells. Rinse thoroughly with clean water. Clean battery and cable contact surfaces to a bright metal finish whenever a cable is removed.
CAUTION
!!
DO NOT support or raise the front of the platform during any maintenance operation as this
may result in damage to the tension members.
WARNING
!!
BEFORE performing, maintenance on work
platform, while elevated, ensure that elevating
assembly is properly supported.
DO NOT stand in elevating assembly area while
installing or removing jackstand.
WARNING
!
!
Hazard of explosive gas mixture. Keep sparks,
flame, and smoking material away from batteries.
Always wear safety glasses when working with
batteries.
Battery fluid is highly corrosive. Thoroughly
rinse away any spilled fluid with clean water.
Page 28
3-4SL26/30SL Work Platform
M
AINTENANCE
Section
3.6
Battery Charging
The battery is charged by the alternator whenever
the engine is running and should not require any
other charging. If the machine has not been in service or if for some other reason the battery has been
discharged, perform the following:
Check the battery fluid level. If the electrolyte level is
lower than 10 mm (3/8 in.) above the plates, add
clean, distilled water only.
Battery Specific Gravity
After charging, if necessary, the specific gravity of all
cells should be checked with a hydrometer. The temperature corrected specific gravity should be 1.260. If
the battery contains any cells with corrected readings
below 1.230, the battery should be replaced.
Do not check the specific gravity in a cell to which
water has just been added. If there is not enough
electrolyte in a fully charged cell to obtain a sample
for the hydrometer, add water and continue charging
for 1 to 2 hours to adequately mix the water and electrolyte.
3.6L
UBRICATION
Refer to Table 3-1 for lubrication intervals and
Figure 3-2 for location of items that require lubrication service. Refer to the appropriate sections for
lubrication information on the hydraulic tank and filter.
Figure 3-2: Lubrication Points
Grease Fittings
Wipe each grease fitting before and after greasing.
Using multipurpose grease in a grease gun, pump
the grease into the fitting until grease just begins to
appear at the edges of the pivot, wipe off any excess
grease.
Linkage Gears
1. Raise platform fully.
2. Using another work platform or ladder, get up
high enough to comfortably reach gears.
3. Use a long handled brush to apply multipurpose
grease to the face of the gears.
4. Lower the platform after greasing.
Steering Linkage
Apply one or two drops of motor oil to each pivot and
king pin bearing.
WARNING
!!
Charge the battery only in a well ventilated
area.
Do not charge the battery when the work platform is in an area containing sparks or flames.
Always follow the charger manufacturer instructions.
Never disconnect the cables from the batteries
when the charger is operating.
CAUTION
!!
Do not use hands to apply grease or allow any
body part to enter the elevating assembly.
1. Grease Fittings
2. Linkage Gears
3. Steering Linkage
Page 29
SL26/30SL Work Platform3-5
M
AINTENANCE
Section
3.6
Hydraulic Pump
Remove the capscrews that mount the pump to the
engine. Remove the pump from the engine and apply
high pressure molybdenum grease to the splines.
Re-install the pump and secure with the capscrews.
Hydraulic Oil Tank & Filter
(Figure 3-3)
Fluid Level
With the platform fully lowered, the oil should be visible in the sight gauge. If the oil is NOT visible, fill the
tank until the oil can be seen. DO NOT fill above the
sight gauge or when the platform is elevated.
Oil & Filter Replacement
1. Operate the work platform for five minutes to
warm up the oil. To change filter only, go to step
5.
2. Provide a suitable container to catch the drained
oil. The hydraulic tank has an oil capacity of 45.5 l
(12 US Gallons).
3. Remove the drain plug and allow all oil to drain
into the container, be sure to dispose of oil properly.
4. Reinstall the drain plug.
5. Unscrew the filter top from the filter body.
6. Lift the filter element from the filter body.
7. Remove filter cup and clean cavity, reinstall cup.
8. Insert the replacement filter into the filter body
and press into position.
9. Fill the hydraulic oil tank to the level of the Sight
Gauge with ISO #46 (see Table 1-1) hydraulic oil
by pouring the oil into the top of the filter. Since
the oil is being filtered as it is going into the tank,
it will take a while to fill the tank.
Figure 3-3: Hydraulic Oil Tank & Filter
CAUTION
!!
The hydraulic oil may be hot enough to cause
burns. Wear safety gloves and safety glasses
when handling hot oil.
1
2
3
1. Drain Plug (under tank)
2. Filter Housing
3. Sight Gauge
Page 30
3-6SL26/30SL Work Platform
M
AINTENANCE
Section
3.7
3.7S
ETTING HYDRAULIC PRESSURES
Referring to Figure 3-13 along with the other Figures
will aid in the following procedures.
Note: Check the hydraulic pressures whenever
the pump, manifold, or relief valve(s) have been
serviced or replaced.
Main Relief Valve (Figure 3-4)
1. Operate the hydraulic system for five minutes.
2. Remove the gauge port plug (Figure 3-5) and
install a quick disconnect gauge assembly.
3. Remove the plug in the end of the main relief
valve to expose the adjusting screw.
4. Remove the hex nut holding the lift coil onto the
lift valves and remove coil.
5. With the engine running, use the chassis lift
switch to elevate the platform, hold until the system bypasses (approximately 2 seconds).
6. While holding the chassis lift switch in the UP
position, set the pressure to 172 bar (2500 psi)
maximum by slowly turning the adjusting screw,
clockwise increases pressure.
7. Reinstall the coil on the lift valve.
8. Remove the pressure gauge and reinstall all
plugs.
Figure 3-4: Hydraulic Manifold Assembly, Front View
Counterbalance Valves (Figure 3-4)
1. Operate the hydraulic system for five minutes to
warm the oil.
2. Remove the quick disconnect plug (Figure 3-5)
and install a 0-41 bar (0-600 psi) pressure gauge
assembly.
3. Exchange the top Counterbalance Valve with the
Main Relief Valve.
4. Remove the plug from the end of the Counterbalance Valve to expose the adjusting screw.
5. Remove the hex nut holding the lift coil onto the
lift valve and remove the coils.
6. With the engine running, use the chassis lift
switch to elevate the platform, hold until the system bypasses (approximately 2 seconds).
7. While holding the chassis lift switch in the UP
position, set the pressure to 34.5 bar (500 psi)
maximum by slowly turning the adjusting screw,
clockwise increases pressure.
8. Exchange the top Counterbalance Valve with the
bottom Counterbalance Valve and repeat the procedure.
9. Be sure to reinstall the valves to their original
locations and replace all plugs when finished setting pressures.
WARNING
!!
The hydraulic oil may be of sufficient temperature to cause burns. Wear safety gloves and
safety glasses when handling hot oil.
The oil in the hydraulic system is under very
high pressure which can easily cause severe
cuts. Obtain medical assistance immediately if
cut by hydraulic oil.
1
2
3
4
1. Main Relief Valve
2. Counterbalance
Valves
3. Lift Coil
4. Steering Relief
Valve
5. Quick Disconnect
5
Page 31
SL26/30SL Work Platform3-7
M
AINTENANCE
Section
3.7
Figure 3-5: Hydraulic Manifold Assembly, Top View
Fore/Aft Tilt Cylinder Relief Valve
(Figure 3-4)
1. Operate the hydraulic system for five minutes.
2. Remove the quick disconnect plug and install a 041 bar (0-600 psi) pressure gauge.
3. Remove the plug from the end of the valve to
expose the adjusting screw.
4. With the engine running, tilt the platform fully for-ward using the fore/aft level switch.
5. While holding the level switch forward, set the
pressure to 34.5 bar (500 psi) maximum by slowly
turning the adjusting screw, clockwise increases
pressure.
6. Replace the valve plug.
7. Remove the gauge and reinstall the plug.
8. Level the platform.
Steering Relief Valve (Figure 3-5)
1. Remove the top steering hose from back of the
manifold and replace it with a 0-207 bar (0-3000
psi) pressure gauge assembly.
2. Block the end of the hose with a cap fitting.
3. Remove the plug from the end of the valve to
expose the adjusting screw.
4. With the engine running, push the Steering
Switch RIGHT and set the pressure to 83 bar
(1200 psi) maximum by slowly turning the adjusting screw clockwise to increase pressure.
5. Replace the valve plug.
6. Remove the gauge and reinstall the hose.
Drive Cross Relief Valve (Figure 3-6)
1. Operate the hydraulic system for five minutes.
2. Remove the gauge port plug and install a 0-207
bar (0-3000 psi) pressure gauge assembly.
3. Exchange the Main Relief Valve with one drive
cross relief valve. The rear drive cross relief valve
is mounted by the left rear tire and the front drive
cross relief valve is mounted behind the control
module towards the front of the machine.
4. Remove the plug from the end of the valve to
expose the adjusting screw.
5. Remove the hex nut holding the lift coil onto the
lift valve and remove the coil.
6. With the engine running, use the chassis lift
switch to elevate the platform, hold until the system bypasses (approximately 2 seconds).
7. While holding the chassis lift switch in the UP
position, set the pressure to 103 bar (1500 psi)
maximum by slowly turning the adjustment screw,
clockwise increases pressure.
8. Exchange the two drive cross relief valves and
repeat the procedure.
9. Reinstall the valves to their original locations and
replace all plugs when finished setting pressure.
1. Using two 1-ton jack stands and a 2-ton jack, jack
the work platform up to raise the rear wheels off
the ground and block the machine securely.
2. Remove the outlet hose from the backside of the
Brake Release Pump and install a 41.4 (0-600
psi) gauge assembly in-line with a tee fitting.
3. Remove the plug on the end of the Brake Relief
Valve.
4. With the engine running, position the Control
Lever to REVERSE and hold.
5. While holding the Control Lever in REVERSE, set
the pressure to 24-33 bar (350-480 psi) maximum by slowly turning the adjusting screw, clockwise to increase pressure.
6. Replace the valve plug.
7. Remove the gauge and tee fitting and reinstall
the hose.
8. Remove the jack stands and lower the machine.
Figure 3-7: Brake Release Pump
3.8S
WITCH ADJUSTMENTS
Proportional Control Adjustment
(Figure 3-8)
To perform the adjustment, the control box must be
opened by removing the screws at the corners of the
controller and rotating the top forward to expose the
proportional controller. Remove the potting material
from the potentiometer adjustment screws if necessary.
Please follow the exact sequence outlined below
when making controller adjustments. It is possible
that making an adjustment to one setting could affect
another, so please verify that all speeds are correct
before completing the adjustment procedure. For all
potentiometers, clockwise movement will increase,
and counterclockwise movement will decrease the
speed of that function.
Figure 3-8: Proportional Controller Adjustment
1. Set the THRESHOLD potentiometers so that the
machine is just starting to move when the controller is stroked slightly forward.
2. Mark out a 6.1 m (20 foot) course on the ground
to use for step numbers 3, 4 and 5.
3. Set the HI RANGE potentiometers so that the
machine will travel 6.1 m (20 ft.) in 5 to 7 seconds
at full controller deflection.
Note: The machine should be running full speed
before crossing the starting line, and should
run perfectly straight through the course.
HI Range Pot
THRESHOLD Pot
LO Range Pot
Page 33
SL26/30SL Work Platform3-9
M
AINTENANCE
Section
3.8
4. Elevate the machine until the lower tension member clears the limit switch lever. Set the LO
RANGE potentiometer so that the machine will
travel 6.1 m (20 ft.) in 27 to 28 at full controller
deflection.
Note: The machine should be running full speed
before crossing the starting line, and should
run perfectly straight through the course.
5. Repeat the speed trials for verification and readjust as necessary.
Figure 3-9: Platform Down Relay & Terminal Block
Axle Center Switch (Figure 3-10)
1. Check tires for proper pressure.
2. Place the work platform on a level surface with
the front and rear axles parallel (on the same
plane).
3. Adjust the switch so it is centered in the front axle
actuator linkage. When centered, the switch will
close the circuit.
4. Test the switch function by positioning the front
axle off-center and raising the platform 2.21-2.26
m (87-89 in.) above the ground. The work platform should not drive. Retest with axle off-center
in the other position.
Figure 3-10: Axle Center Switch
Cushion Down Limit Switch
(Figure 3-11)
The cushion down limit switch is a mercury switch
that provides power to energize the cushion valve
during the last 30 cm (12 in.) of platform lowering.
1. Raise the platform 30 cm (12 in.) from its’ fully
lowered position.
2. Disconnect the wires at the mercury switch and
connect an ohmmeter or continuity tester.
3. Rotate the switch until it just closes. If necessary,
tighten the locknut that mounts the switch.
4. Raise and lower the platform to verify the adjustment.
5. Disconnect ohmmeter and reconnect wires.
6. Lower platform.
Platform Down
Relay “A” Terminal
Small Terminal
Block
Axle Center
Switch
Actuator Linkage
Page 34
3-10SL26/30SL Work Platform
M
AINTENANCE
Section
3.8
Lift Cutout Limit Switch (Figure 3-11)
The lift cutout limit switch is a mercury switch that
prevents the lift cylinder from bottoming out when the
platform is raised.
1. Raise the platform to its’ maximum height (mercury switch may need to be rotated if switch is
cutting out lift function before cylinder bottoms
out).
2. Mark the cylinder rod 25.4 mm (1 in.) from base
of the rod. Lower platform slightly so the mark is
at cylinder head cap.
3. Disconnect the wires at the mercury switch and
connect an ohmmeter or continuity tester.
4. Rotate the switch until it just opens. If necessary,
tighten the locknut that mounts the switch.
5. Raise and lower the platform to verify the adjustment.
6. Lower platform.
Figure 3-11: Limit Switch Locations
Down Limit Switch (Figure 3-11)
The down limit switches are dual proximity switches
which allow the machine to run at HI speed when the
platform is lowered.
1. Raise the platform 30 cm (12 in.) from its’ fully
lowered position.
2. Disconnect the wires at the proximity switches
and connect an ohmmeter or continuity tester.
3. Move the brackets holding the magnets so the
switch just closes. Tighten the locknuts that hold
the brackets.
4. Raise and lower the platform to verify the adjustment.
5. Disconnect ohmmeter and reconnect wires.
6. Lower platform.
Tilt Sensor (Figure 3-12)
The tilt sensor has three wires; red-power (12v in),
black-ground, white-output (12v out). To verify the
sensor is working properly, there is one LED under
the sensor; red indicates the sensor is out of level
and the white wire is “hot” (12v out).
1. Level the platform with the platform controls using
the inclinometer (p/n: 010119-000) to ensure the
platform is level ±1/4°. side-to-side and front-toback.
2. Adjust the platform bubble level with the three leveling screws until the bubble is centered in the circle on the bubble level.
3. Dismount the platform and remove the cover from
the back of the mast pivot weldment.
4. Adjust the three leveling locknuts on the tilt sensor until the bubble is centered in the circle on the
attaches bubble level.
5. Replace the mast pivot weldment cover.
Figure 3-12: Tilt Sensor Adjustment
Cushion Down
Limit Switch
Lift Cutout
Limit Switch
Magnets
Down Limit
Switches
8 Meter Cutout
Limit Switch
Page 35
SL26/30SL Work Platform3-11
M
AINTENANCE
Section
3.9
3.9H
YDRAULIC MANIFOLD
(F
IGURE
3-13)
Though it is not always necessary to remove the
manifold to perform maintenance procedures, a
determination should be made prior to beginning as
to whether or not the manifold should be removed
before maintenance procedures begin.
Removal
1. Disconnect the battery ground cable.
2. Tag and disconnect the solenoid valve leads from
the terminal strip.
3. Disconnect the cushion valve block.
4. Tag, disconnect and plug hydraulic hoses.
5. Remove the bolts that hold the manifold to the
mounting bracket.
6. Remove manifold block.
Disassembly
Note: Mark all components as they are removed
so as not to confuse their location during
assembly. Refer to Figure 3-13 often to aid in
disassembly and assembly.
1. Remove coils from solenoid valves.
2. Remove spool valve covers and spool valves.
3. Remove solenoid valves, main relief valve, counterbalance valves and emergency lowering
valves.
4. Disconnect cushion down valve block.
5. Remove tilt/level block and the manifold block.
6. Remove fittings, plugs, springs, balls and orifices.
Cleaning and Inspection
1. Wash the manifold in cleaning solvent to remove
built up contaminants and then blow out all passages with clean compressed air.
2. Inspect the manifold for cracks, thread damage
and scoring where O-rings seal against internal
and external surfaces.
3. Wash and dry each component and check for
thread damage, torn or cracked O-rings and
proper operation.
4. Replace parts and O-rings found unserviceable.
Assembly
Note: Lubricate all O-rings before installation to
prevent damage to O-rings. Seat all balls in
manifold block by lightly tapping on the ball
with a brass drift.
1. Install fittings, plugs, balls and orifices. Use one
drop of Locktite #242 on each screw-in orifice.
2. Install tilt/level block and manifold block.
3. Install emergency lowering valve, counterbalance
valves, main relief valve, brake pressure reducing
valve, solenoid valves and spool valves.
4. Install coils on solenoid valves.
Installation
1. Attach manifold assembly to mounting plate with
bolts.
Note: Longer bolt goes in hole nearest the front
of the module.
2. Attach cushion down valve block.
3. Connect solenoid leads to terminal strip (as previously tagged).
4. Connect hydraulic hoses. Be certain to tighten
hoses to manifold.
5. Operate each hydraulic function and check for
proper operation and leaks.
6. Adjust all hydraulic pressures according to
instructions in Section 3.5.
Page 36
3-12SL26/30SL Work Platform
M
AINTENANCE
Section
3.9
Figure 3-13: Hydraulic Manifold, Exploded View
1.Manifold
2.Manifold Block
3.Steering Valves
4.Three Way Valves
5.Flow Regulator
6.Flow Divider
8.Brake Pressure Reducing
Valve
9.Lowering Valve
10. Lift Check Valve
11. Relief Valve
12. Ball, 5/16” Dia.
14. Ball, 1/2” Dia.
15. Spring
16. Spring
17. Orifice
18. Piston
22. Plug - SAE #4
23. Plug - SAE #6
24. Plug - SAE #8
25. Lift Valve
26. Screw, 3/4”
27. Washer, 3/8”
29. O-ring
30. Fitting Adapter
31. Fitting Adapter
32. Lowering Orifice
33. Cable Connector
36. Screw, 10-24
37. Fitting Adapter
38. Fitting Adapter
40. Relief Valve
42. Screw, 5/16”
43. Lockwasher, 5/16”
44. Tilt Level Block
45. Pluge
46. Relief Valve
47. Cushion Valve
48. Valve Poppet
49. Fitting, 90°
50. Relief Valve
51. Spacer
52. O-ring
53. Lift Check Valve
54. Relief Valve
57. Pressure Switch
58. Spacer
59. O-ring
60. Fitting, Gauge conn.
Page 37
SL26/30SL Work Platform3-13
M
AINTENANCE
Section
3.10
3.10 H
YDRAULIC PUMP
(F
IGURE
3-14)
Note: If the hydraulic tank has not been drained,
suitable means for plugging the hoses should
be provided to prevent excessive fluid loss.
Removal
1. Mark, disconnect and plug the hose assemblies.
2. Loosen the capscrews and remove the pump
assemblies from the engine.
Installation
1. Lubricate the pump shaft with extreme high pressure molybdenum grease and attach the pumps
to the engine with capscrews.
2. Using a criss-cross pattern, torque each capscrew a little at a time until all four capscrews are
torqued to 27 Nm (20 ft. lbs.).
3. Unplug and reconnect the hydraulic hoses.
4. Check the oil level in the hydraulic tank before
operating the work platform.
Figure 3-14: Typical Hydraulic Pump
3.11 H
YDRAULIC BRAKES
, D
RIVE MOTORS
& H
UBS
Rear Axle (Figure 3-15)
Removal
1. Park the work platform on firm, level ground and
block the wheels to prevent the work platform
from rolling.
2. Loosen the wheel lug bolts on the motor to be
removed.
3. Raise the rear of the work platform using a 2-ton
jack.
4. Position 2 1-ton jack stands under the rear axle to
prevent the work platform from falling if the jack
fails.
5. Remove the wheel lug bolts and wheel.
6. Remove the cotter pin, nut, hub, and shaft key.
7. Tag and disconnect the hose assemblies.
8. Remove the capscrews, lockwashers and drive
motor assembly from the rear axle.
9. Remove the capscrews, washers, brake and drive
motor assembly from the rear axle.
10. Remove the socket screws from the drive motor
and then separate the brake from the drive motor.
Installation
1. Insert the drive motor with O-ring installed into
the brake and secure with socket screws using
Locktite #242 retaining compound on the screw
threads.
2. Position the drive motor and brake in the rear axle
and secure with washers and capscrews.
3. Reinstall the adaptor and crossover block assembly to the hydraulic motor.
4. Reinstall the hose assemblies.
1
2
CAUTION
!!
ONLY use a wheel puller to remove the hub.
Using any other method of removal may damage the drive motor housing or shaft and void
the warranty.
Clean all fittings before disconnecting the hose
assemblies.
Plug all port holes and hose assemblies IMMEDIATELY to prevent contamination from dust
and debris.
1. Inlet Hose
2. Outlet Hose
Page 38
3-14SL26/30SL Work Platform
M
AINTENANCE
Section
3.11
5. Reinstall the shaft key, hub, and nut. Torque each
wheel hub nut to 475 Nm (350 ft. lbs.). Align the
slot in the nut with the hole in the shaft and insert
the cotter pin. DO NOT back off the nut to align.
6. Reinstall the wheel and lug bolts onto the hub.
Torque the lug bolts to 123 Nm (90 ft. lbs.).
7. Remove the jack stands used to block the
wheels. Lower the jack and remove.
8. Operate the drive system to check for leaks and
proper function.
Figure 3-15: Rear Axle Assembly
Front Axle (Figure 3-16)
Removal
1. Park the work platform on firm, level ground and
block the wheels to prevent the work platform
from rolling.
2. Loosen the wheel lug bolts on the motor to be
removed.
3. Raise the front of the chassis using a 2-ton jack.
4. Position 2 1-ton jack stands under the front axle
to prevent the work platform from falling if the jack
fails.
5. Remove the wheel lug bolts and wheel.
6. Remove the cotter pin, nut, hub and shaft key
7. Tag and disconnect the hose assemblies.
8. Remove the adaptor from the hydraulic motor.
9. Remove the capscrews and nuts and then
remove the drive motor from the front axle steering mount.
Installation
1. Position the drive motor into the steering mount
and secure with capscrews and nuts.
2. Reinstall the adaptor on the hydraulic motor.
3. Reinstall the hose assemblies.
4. Reinstall the shaft key, hub, and nut. Torque each
wheel hub nut to 475 Nm (350 ft. lbs.). Align the
slot in the nut with the hole in the shaft and insert
the cotter pin. DO NOT back off the nut to align.
5. Reinstall the wheel and lug bolts onto the hub.
Torque the lug bolts to 123 Nm (90 ft. lbs.).
6. Remove the jack stands used to block the
wheels. Lower the jack and remove.
7. Operate the drive system to check for leaks.
Figure 3-16: Front Axle Assembly
1. Lug Bolt
2. Tire/Wheel
Assembly
3. Cotter Pin
4. Slotted Nut
5. Adapter Hub
6. Shaft Key
7. Brake
8. O-ring
9. Drive Motor
CAUTION
!!
ONLY use a wheel puller to remove the hub.
Using any other method of removal may damage the drive motor housing and void the warranty.
Clean all fittings before disconnecting the hose
assemblies.
Plug all holes assemblies IMMEDIATELY to prevent contamination from dust and debris.
1. Lug Bolt
2. Tire/Wheel
Assembly
3. Cotter Pin
4. Slotted Nut
5. Adaptor Hub
6. Shaft Key
7. Drive Motor
8. Steering Mount
Page 39
SL26/30SL Work Platform3-15
M
AINTENANCE
Section
3.12
3.12 A
XLE CYLINDER
Removal
Be sure platform is fully down and that machine is on
level ground.
1. Remove and cap the hoses.
2. Unscrew both cylinder retaining bolts noting the
position of the washers. Remove the bolts from
the cylinder and mounts.
3. Lift the cylinder from the mounts.
Installation
1. Completely fill both ends of cylinder with hydraulic oil.
a. Lay the cylinder on its’ side on a level table with
the pilot operated check valves up.
b. Remove the pilot operated check valves from
the ports.
c. Pour hydraulic oil into the cylinder through the
pilot operated check valve ports.
d. The opening to the cylinder is small. Be careful
to ensure all air is removed and the cylinder is
full of oil.
e. Reinstall the pilot operated check valves.
2. Attach both ends of the cylinder to mounts with
cylinder retaining bolts.
3. Torque the retaining bolts to 203 Nm (150 ft. lbs.).
4. Operate the work platform over rough terrain and
check for proper function and leaks.
3.13 S
TEERING CYLINDER
(F
IGURE
3-17)
Removal
1. Mark and disconnect the hose assemblies from
the fittings and immediately cap the openings to
prevent foreign material from entering.
2. Remove the capscrews securing the rod ends to
the steering linkage.
3. Loosen the nut and bolt in front of the Steering
Cylinder that goes through the frame.
4. Remove the capscrews and locknuts that fasten
the cylinder assembly to the chassis.
5. Remove the cylinder from the chassis.
Disassembly
1. Remove the fittings from both ends of the cylinder.
2. Remove the headcaps from the barrel tube, being
sure to mark which end of the barrel tube the
headcap was removed from.
3. Withdraw the entire shaft assembly from either
end of the barrel tube.
4. Remove the rod wipers, rod seals and static Orings from the headcaps.
5. Discard all the seals.
6. Unscrew the No. 1 shaft from the No. 2 shaft and
remove the piston.
7. Remove the piston seal and static O-ring from the
piston and discard.
Cleaning and Inspection
1. Wash all the metal parts in cleaning solvent and
blow dry with filtered compressed air.
2. Inspect all the threaded components for stripped
or damaged threads.
3. Check the inside surface of the barrel tube for
scoring or excessive wear.
4. Check the piston and head caps for scoring or
excessive wear.
5. Inspect the surface of both shafts for scoring or
excessive wear.
Assembly and Installation
1. Install a new piston seal and static O-rings.
2. Install the piston on the No. 1 shaft.
3. Thread the No. 2 shaft onto the No. 1 shaft and
tighten securely.
4. Lubricate the piston seal with clean hydraulic fluid
and install the shaft assembly in the barrel tube.
Page 40
3-16SL26/30SL Work Platform
M
AINTENANCE
Section
3.14
5. Lubricate and install new rod seals and static Orings on the headcaps.
6. Lubricate and install new rod wipers in the headcaps.
7. Install headcap in the barrel tube and tighten until
the mounting holes are in-line.
Note: Headcaps must be reinstalled in the same
end from which they were removed.
8. Install the fittings in the ends of the cylinder.
9. Position the cylinder assembly in the chassis and
install the capscrews and locknuts, but DO NOT
tighten.
10. Tighten the nut and bolt in front of the cylinder
that goes through the frame and then tighten the
cylinder mounting capscrews.
11. Install the cylinder rod ends.
12. Connect the hose assemblies to the fittings.
13. Operate the steering circuit several times
throughout its’ entire range of travel to expel
trapped air and check for leaks.
Figure 3-17: Steering Cylinder Assembly
Adjustment
1. Disconnect the cylinder rod ends (if connected).
2. Operate steering so that both ends of the cylinder
rod are equal length (.8 mm, ±1/32 inch).
3. Position both tires so they are parallel with the
frame and with each other.
4. Adjust the rod ends until they align with the holes
on the steering linkage bars.
5. Reinstall the bolts through the steering linkage
bars and rod ends. Tighten the jam nuts on the
rod ends and all hardware.
6. When properly adjusted, the wheels must turn
the same amount in each direction.
3.14 L
IFT CYLINDER
(F
IGURE
3-18)
Note: DO NOT support or raise the front of the
platform during any maintenance operation as
this might result in damage to the tension
members.
Removal
1. Raise and block the front of the elevating assembly approximately 305 mm (12 inches) above the
chassis. Support with a jackstand with a minimum rating of 1814 kg (4000 lbs.).
2. Open Emergency Lowering Valve to be sure all
pressure is off the Lift Cylinder.
3. Remove and cap both hoses and fittings.
4. Support the Lift Cylinder to prevent falling.
5. Remove the set screw from the end of the cylinder rod.
6. Remove the retaining ring from the upper cylinder
pin. Remove the upper cylinder pin by tapping out
using a soft punch.
7. Remove the retaining bolt from the lower cylinder
pin and remove the pin using a soft punch.
8. Remove the cylinder by sliding it out of the front
of the machine.
1. No. 2 Shaft
2. Headcap (2)
3. Rod Wiper (2)
4. Rod Seal (2)
5. Static O-ring (2)
6. Cylinder Barrel
7. Piston
8. Piston Seal
9. Piston Static Oring
10. No. 1 Shaft
Page 41
SL26/30SL Work Platform3-17
M
AINTENANCE
Section
3.14
Disassembly
1. Unscrew the head cap from the cylinder barrel.
2. Remove the piston and rod assembly from the
cylinder barrel.
3. Unscrew the piston nut and remove piston and
head cap from the piston rod.
4. Remove the piston static O-ring from the cylinder
rod and discard.
5. Remove the piston seal from the piston and discard.
6. Remove the static O-ring, rod seal and rod wiper.
7. Remove the rod end breather.
8. Do not remove the velocity fuse unless replacement is necessary.
Cleaning and Inspection
1. Clean all the metal parts in cleaning solvent and
blow dry with filtered compressed air.
2. Check the working surfaces of the piston head
cap, cylinder barrel and rod for excessive wear or
scoring.
3. Replace parts found to be unserviceable.
4. Replace all seals, O-rings and wipers.
Reassembly
1. Lubricate the static O-ring, rod seal and rod wiper
and then install in the head cap.
2. Install the piston seal on the piston.
3. Install the head cap, piston static seal, piston and
piston nut on the cylinder rod. Torque nut to 96
Nm (70 ft. lbs.).
Note: The head cap should be installed from the
piston end of the cylinder rod. Sliding the head
cap over the pivot pin hole may damage the rod
seal and rod wiper.
Figure 3-18: Lift Cylinder Assembly
4. Lubricate and piston seal and install the piston
and rod assembly into the cylinder barrel.
5. Screw the head cap into the cylinder barrel hand
tight and then turn 1/4 turn further.
Installation
Note: Before installing the cylinder, check the
pins and bearings for excessive wear. Replace
if necessary.
1. Place the cylinder in position taking care to support the cylinder to prevent falling.
2. Install the lower pin and retaining bolt.
3. Install the upper pin and retaining ring.
4. Install both hoses.
5. Raise the machine and check for leaks.
1. Cylinder Barrel
2. Velocity Fuse
3. Fitting, Adapter
4. Hose Assembly
5. Breather
6. Piston Nut
7. Piston Seal
8. Piston
9. Piston Static O-ring
10. Static O-ring
11. Head Cap
12. Cylinder Rod
13. Set Screw
14. Rod Wiper
15. Rod Seal
16. Nut
17. Hose Assembly
15
1
2
3
4
5
6
7
8
9
10
11
12
13
14
16
17
10
Page 42
3-18SL26/30SL Work Platform
M
AINTENANCE
Section
3.15
3.15 T
ORQUE SPECIFICATIONS
Fasteners
Use the following values to torque fasteners used on
UpRight Work Platforms unless a specific torque
value is called out for the part being installed.
Hydraulic Components
Use the following values to torque hydraulic components used on UpRight Work Platforms.
Note: Always lubricate threads with clean hydrau-
lic oil prior to installation
Table 3-1: Torque Specifications for Fasteners
AMERICAN STANDARD CAP SCREWSMETRIC CAP SCREWS
SAE GRADE58
METRIC
GRADE
8.810.9
Cap Screw
Size (inches)
Cap Screw
Size
(millimeters)
TORQUETORQUETORQUETORQUE
Ft./LbsNm.Ft./Lbs.Nm.Ft./Lbs.Nm.Ft./Lbs.Nm.
MINMAXMINMAXMINMAXMINMAxMINMAXMINMAXMINMAXMINMAX
1/4 - 206.257.258.5108.259.51113M6 x 1.00688119111215
1/4 - 2889111210.5121416M8 x 1.25162021.52723273136.5
5/16 - 181415192018.5202527M10 x 1.502935394742525770
5/16 - 2417.519232623253134M12 x 1.75526270847591102123
3/8 - 1626283538353747.550M14 x 2.0085103115139120146163198
3/8 - 2431344246414555.561M16 x 2.50130158176214176216238293
7/16 - 14414555.561556074.581M18 x 2.50172210233284240294325398
7/16 - 2051556974.5687592102M20 x 2.50247301335408343426465577
1/2 - 1365728897.58696116130M22 x 2.50332404450547472576639780
1/2 - 207684103114102112138152M24 x 3.00423517573700599732812992
9/16 - 1295105129142127140172190M27 x 3.0063777986310558981098 12171488
9/16 - 18111123150167148164200222M30 x 3.00872106611811444 122414961658 2027
5/8 - 11126139171188168185228251
NOTE: These values apply to fasteners as received from the supplier, dry or when
lubricated with normal engine oil. They do not apply if special graphited or
molydisulphide greases or other extreme pressure lubricants are used
5/8 - 18152168206228203224275304
3/4 - 10238262322355318350431474
3/4 - 16274302371409365402495544
7/8 - 9350386474523466515631698
7/8 - 14407448551607543597736809
1 - 85375927288027167909701070
1 - 14670740908100389498712111337
Table 3-2: Torque Specifications for Hydraulic Components
Type: SAE Part SeriesCartridge PoppetFittingsHoses
Thoroughly study the hydraulic and electrical schematics in Section 5.
Check for loose connections and short circuits.
Check/Repair/Replace each component in the Truth
Table which is listed under each machine function
which does not operate properly.
Upright Product Support
UPR
IGHT
USATEL:1-559-891-5200
FAX: 1-559-896-9244
U
PRIGHT IRELAND
TEL:353-1-202-4100
FAX: 353-1-202-4105
Tab lePag e
Electrical Schematic Truth Table, Diesel ...............4-2
Hydraulic Schematic Truth Table ........................... 4-4
WARNING
!!
When troubleshooting, ensure that the work
platform is resting on a firm, level surface.
When performing any service on, or in the Elevating Assembly area, which requires the platform to be raised, the Elevating Assembly must
be blocked
Disconnect the battery ground cable when
replacing or testing the continuity of any electrical component.
Page 44
4-2SL26/30SL Work Platform
T
ROUBLESHOOTING
Section
4.1
4.1E
LECTRICAL TRUTH TABLE
, D
IESEL
Table 4-1: Electrical Truth Table - Diesel (064149-079)
C
OMPONENT
F
UNCTION
E
NGINE
S
TART
& R
UN
U
PPER
C
ONTROL
F
UNCTIONS
L
OWER
C
ONTROL
F
UNCTIONS
R
AISE
P
LATFORM
L
OWER
P
LATFORM
D
RIVE
F
ORWARD
D
RIVE
R
EVERSE
H
IGH
/L
OW
S
PEED
S
TEER
L
EFT
S
TEER
R
IGHT
B
ATTERY
C
HARGE
A
LARMS
P
LATFORM
L
EVEL
ALM1Alarm, DownXX
ALM2Alarm, TiltXXX
ALTAlternatorX
BATBattery, 12 VoltX
CO1Coil, ThrottleX
CO2Coil, RunX
D1DiodeX
D2DiodeX
D3DiodeX
D4DiodeX
D5DiodeXX
D6DiodeXXX
D7DiodeX
D8DiodeXX
D9DiodeXX
D10DiodeXX
F1Fuse, 15 AmpXXXXXXXX
F2Fuse, 15 AmpXXXXXXXX
HMHour Meter
LS1Limit Switch, Platform Down
****
XXXX
LS2Limit Switch, Cushion DownX
LS3Limit Switch, Axle Center
****
PS1Oil Pressure SwitchXXXXX
PS2Pressure Switch, LiftX
R1Relay, Platform DownXX
R2Relay, CutoutX
****
R3Relay, DriveXX
R4Relay, ThrottleXXX
R5Relay, Drive/LiftXX
R6Relay, StartXXXXX
R7Relay, ControllerXXX
R8Relay, Engine StartX
NOTE: Schematic shows machine in Hi-Torque. * shows high speed drive
** De-Energized when platform is elevated.
XX Schematic shows machine steering when platform is lowered.
# Schematic shows machine elevated in steering and drive.
## Elevated drive only.
Page 45
SL26/30SL Work Platform4-3
T
ROUBLESHOOTING
Section
4.1
R9Relay, StarterX
R10Relay, Glow PlugX
RES1Glow PlugsX
S1Switch, Interlock Lever (Trigger)XXXX
S2Switch, Down/ReverseXX
S3Switch, Lift/ForwardXX
S4,5Switches, SteeringXX
S6Switch, Emergency Stop (Upper)XXXXXXXXX
S7Switch, KeyXXXXXXX
S8Switch, Drive/Level/LiftXXXXX
S9Switch, Torque Selector
**
S10Switch, Emergency Stop (Lower)XXXX
S11Switch, Chassis LiftX
S12Switch, Tilt Fore/AftX
S13Switch, Tilt Right/Left
X
S14Switch, Platform/Chassis
X
S15Switch, Platform Down LimitXX
S16Switch, Drive CutoutXX
S17Switch, Glow PlugX
SEN1Sensor, LevelX####
SOL1Solenoid, Steer RightX
SOL2Solenoid, Steer LeftX
SOL3Solenoid, ForwardX
SOL4Solenoid, ReverseX
SOL5Solenoid, UpX
SOL6Solenoid, DownXXX
SOL7Solenoid, ProportionalXXX
SOL8Solenoid, CushionX
SOL9,10Solenoids, Series/Parallel
**
SOL11Solenoid, Axle FloatXX
SOL12Solenoid, Tilt ForwardX
SOL13Solenoid, Tilt Aft
X
SOL14Solenoid, Tilt Right
X
SOL15Solenoid, Tilt Left
X
SOL16Solenoid, Steer Bypass
XX
STRStarterX
C
OMPONENT
F
UNCTION
E
NGINE
S
TART
& R
UN
U
PPER
C
ONTROL
F
UNCTIONS
L
OWER
C
ONTROL
F
UNCTIONS
R
AISE
P
LATFORM
L
OWER
P
LATFORM
D
RIVE
F
ORWARD
D
RIVE
R
EVERSE
H
IGH
/L
OW
S
PEED
S
TEER
L
EFT
S
TEER
R
IGHT
B
ATTERY
C
HARGE
A
LARMS
P
LATFORM
L
EVEL
NOTE: Schematic shows machine in Hi-Torque. * shows high speed drive
** De-Energized when platform is elevated.
XX Schematic shows machine steering when platform is lowered.
# Schematic shows machine elevated in steering and drive.
## Elevated drive only.
Page 46
4-4SL26/30SL Work Platform
T
ROUBLESHOOTING
Section
4.2
4.2H
YDRAULIC TRUTH TABLE
Table 4-2: Hydraulic Truth Table (064148-022)
C
OMPONENT
F
UNCTION
R
AISE
P
LATFORM
L
OWER
P
LATFORM
D
RIVE
F
ORWARD
D
RIVE
R
EVERSE
H
IGH
/L
OW
S
PEED
S
TEER
L
EFT
S
TEER
R
IGHT
B
RAKESAXLE
F
LOAT
T
ILT
BR1&2Brake, Multi-discX
CV1Check Valve, BrakeX
CV2Check Valve, LiftX
CV3,4Check Valve, Axle Float CylinderX
CV5-8Check Valves, Tilt Cylinder
X
CYL1Cylinder, Steering
XX
CYL2Cylinder, LiftX
CYL3Cylinder, Axle FloatX
CYL4Cylinder, Fore/Aft Tilt
X
CYL5Cylinder, Side/Side Tilt
X
FD1Flow Divider, Steering
XX
FD2Flow Divider/CombinerXXXX
FD3Flow Divider, TiltX
FL1Filter
XXXXXXXXXX
FL2Filter, Suction Screen
XXXXXXXXXX
MOT1-4Motor, Drive
XX
ORF1Orifice, DownX
ORF2Orifice, Cushion DownX
P1Pump, HydraulicXXXXXXXXXX
RV1Relief Valve, Main
XXXXXX
RV2Relief Valve, SteeringXX
RV3Relief Valve, Rear Drive CrossXX
RV4Relief Valve, Front Drive CrossXX
RV5Relief Valve, Fore/Aft TiltX
SV1Shuttle Valve
XX
Page 47
SL26/30SL Work Platform4-5
T
ROUBLESHOOTING
Section
4.2
V1Valve, SteeringXX
V2Valve, Forward CounterbalanceX
V3Valve, Reverse CounterbalanceX
V4Valve, ForwardX
V5Valve, ReverseX
V6Valve, Ve loci ty FuseX
V7Valve. LiftX
V8Valve, DownX
V9Valve. ProportionalXX
V10Valve, Brake ReleaseX
V11Valve, Axle FloatX
V12,13Valves, Series/Parallel
XX
V14Valve, Brake Pressure ReducingX
V15Valve, Cushion DownX
V16Valve, Steering DumpXX
V17Valve, Fore/Aft TiltX
V18Valve, Side/Side Tilt
X
C
OMPONENT
F
UNCTION
R
AISE
P
LATFORM
L
OWER
P
LATFORM
D
RIVE
F
ORWARD
D
RIVE
R
EVERSE
H
IGH
/L
OW
S
PEED
S
TEER
L
EFT
S
TEER
R
IGHT
B
RAKESAXLE
F
LOAT
T
ILT
Page 48
4-6SL26/30SL Work Platform
T
ROUBLESHOOTING
Section
4.2
N
OTES
:
Page 49
Section 5
S
CHEMATICS
Introduction
This section contains electrical and hydraulic schematics and associated information for maintenance
purposes.
The schematics may be used in conjunction with the
Troubleshooting Truth Tables in Section 4. They
are designed to be an aid in understanding each
machine function.
They may be used for checking, tracing, and faultfinding during troubleshooting machine operation.
The components in the electrical and hydraulic schematics are given a reference designation and are
explained as to function and location in the following
tables.
D1DiodeSupplies power to Drive RelayFanning Strip
D2DiodeSupplies power to Drive RelayFanning Strip
D3DiodeSupplies power to throttleFanning Strip
D4DiodeSupplies power to throttleFanning Strip
D5DiodeSupplies power to down circuitFanning Strip
D6DiodeSupplies power to down circuitFanning Strip
D7DiodeSupplies power to joystick terminal F anning Strip
D8DiodeSupplies power to joystick terminal F anning Strip
D9DiodeSupplies power to Controller Relay Upper Controls
D10DiodeSupplies power to Drive RelayOn Drive Relay R3
D11DiodeProvides power to Drive RelayUpper Controls
D12DiodeSupplies power to Steer BypassFanning Strip
D13DiodeSupplies power to Steer BypassFanning Strip
D14-17 DiodesSupplies power to Steer BypassFanning Strip
D18DiodeSupplies power to Platform Level
D19DiodePrevents power from ke yswi tch S14
D20DiodeSupplies power to Choke Switch
F1Fuse, 15 AmpOverload protection f or control
F2Fuse, 15 AmpOverload protection f or control
HMHour MeterTracks hours machine has been in
LS1Limit Switch,
LS2Limit Switch,
LS3Limit Switch, Axle
PS1Pressure Switch,
PS3Pressure Switch, Lift Cuts power to high speed circuit
R1Relay, Platform
NAMEFUNCTIONLOCATION
Control Module
Control Module
Po w er Module
On Down Relay R1
On keyswitch S14
Upper Controls
Control Module
Control Module
Control Module
Elevati ng Assembly at
Lift Cylinder
Mounted to lower
tension member
Mounted behind left
front axle
Po w er Module
Valve Manifold
Control Module
Platform Down
Cushion Down
Center
Engine Oil
Down
is lowered.
platform is elevated and not le vel
engine is running
circuit when platform is down
from energizing terminal strip B
S17
circuit
circuit
operation.
Energizes platform down relay,
providing power to joystick
Provides power to Cushion Valve
during last 6 in. of lowering
Supplies power to Drive Relay
when platform is elevated.
Cuts power to engine when oil
pressure falls to danger ous levels
and Axle Float Solenoid when there
is pressure in the lift circuit
Provides power to Series/Parall el
and Down V alves and Cutout Relay
DESIGNA
TION
R2Relay, CutoutProvides power to Drive Relay thru
R3Relay, DriveEnergized by Pla tform Down Relay
R4Relay, ThrottleProvides power to the Throttle
R5Relay, Drive/LiftProvides power to forward or
R6Relay, RunProvides power to Run Solenoid
R7Relay, Controll erProvides power to the joystick “+”
R8Relay, StartEngages Starter RelayPower Module
R9Relay, StarterConnects battery to star ter motor Start er Motor
R10Relay, Glow PlugProvides power to Glow PlugsPower Module
RES1Glow PlugsAids starting engine when coldPower Module
S1Switch, Interlock
S2Switch, Down/
S3Switch, Lift/Forward Provides power to lift and forward
S4,5Switch, SteeringProvides power to steer left/right
S6Switch, Emergency
S7Switch, KeySupplies power to controls and
S8Switch, Drive/Level/
S9Switch, Torque
S10Switch, Emergency
S11Switch, Chassis Lift Supplies power to Up and
S12Switch, Tilt Fore/Aft Provides power to Tilt Fore or Aft
S13Switch, Tilt Right/
S14Switch, Platfo rm/
S15Switch, Platfo rm
S16Switch, Drive Cutout Disables drive function when
S17Switch, Glow Plug Engages glow plugs to aid starting
NAMEFUNCTIONLOCATION
Control Module
Control Module
Control Module
Control Module
Control Module
Upper Controller
Upper Controls
Upper Controls
Upper Controls
Upper Controls
Upper Controls
Upper Controls
Lower Controls
Upper Controls
Upper Controls
Lower Controls
Upper Controls
Elevati ng Assembly at
Lift Cylinder
Upper Controls
Lever (Trigger)
Reverse
Stop (Upper)
Lift
Select o r (Drive/L if t
speed)
Stop (Lower)
Left
Chassis
Down Limit
Axle Center Switch and closes Lift
circuit when energized by Platform
Down Relay
when platform is down or by Cutout
Relay thru Axle Center Switch
Solenoid to increase RPM
reverse coils when not energized
thru Oil Pressure Switch
terminal
Enables lift/drive/level functions
when depressed
Provides power to down and
reverse circuit s when actuated
circuits when actuated
circuits when actuated with thumb
rocker switch on joystick
Cuts power to control circuitsUpper Controls
engine
Supplies power to selected circuits Upper Controls
Provides power to Series/Parall el
Valves to provide high speed drive/
lift
Cuts power to control circuitsLower Controls
Proportional coils or down circuit
Coils to level platform
Provides power to Tilt Right or Left
Coils to level platform
Toggles power between platform
controls and lower contr ols
Prevents Lift Cylinder from
bottoming out on down stroke
platform is above 8 meters
engine when cold
5-2SL26/30SL Work Platform
Page 51
SL26/30SL Work Platform5-3
S
CHEMATICS
Section
5.1
SEN1 Sensor, LevelCuts power to Cutout Relay when
platform is out of level 2°
Inside mast pivot
weldment
SOL1 Solenoid, Steer
Right (Coil)
Shifts Steer Valve to right turn
position
Valve Manifold
SOL2 Solenoid, Steer Left
(Coil)
Shifts Steer Valve to left turn
position
Valve Manifold
SOL3 Solenoid, Forward
(Coil)
Opens Forward Valve to direct oil
through drive circuit for forward
Valve Manifold
SOL4 Solenoid, Reverse Opens Reverse Val ve to direct oil
through drive circuit for reverse
Valve Manifold
SOL5 Solenoid, Up (Coil) Opens Lift ValveValve Manifold
SOL6 Solenoid, Down
(Coil)
Opens Down ValveValve Manifold
SOL7 Solenoid,
Proportional (Coil)
Controls Proportional ValveValve Manifold
SOL8 Solenoid, Cushion
(Coil)
Opens Cushion Down Valve to slow
descent during last 6 in. of travel
Valve Manifold
SOL9,10 Solenoids, Series/
Parallel (Coil)
Opens Series/Parallel Valve to
allow high speed drive
Valve Manifold
SOL11 Solenoid, Axle Float
(Coil)
Locks front axle when platform is
elevated
Side of Hydraulic
Tank
SOL12 Solenoid, Tilt
Forward (Coil)
Opens Tilt Fore V alve to direct oil to
tilt platform forward
Auxiliary Valve
Manifold
SOL13 Solenoid, Tilt Aft
(Coil)
Opens Tilt Aft Valve to direct oil to
tilt platform to the rear
Auxiliary Valve
Manifold
SOL14 Solenoid, Tilt Right
(Coil)
Opens Tilt Right Valve to direct oil
to tilt platform to the right
Auxiliary Valve
Manifold
SOL15 Solenoid, Tilt Left
(Coil)
Opens Tilt Left Valve to direct oil to
tilt platform to the Left
Auxiliary Valve
Manifold
SOL16 Solenoid, Steer
Bypass
Closes Steer Bypass Valve to direct
oil to steering or tilt circuits
Auxiliary Valve
Manifold
STR Starter, MotorStarts engine when Starter Relay is
Manifold
FL1 FilterFilters oil returning to tank.Top of hydraulic tank
FL2 Filter, Suction
Screen
Traps particles in hydraulic tank Inside hydraulic tank,
at outlet.
MOT1 Motor, DriveDrives left rear wheelLeft rear axle
MOT2 Motor, DriveDrives right front wheelLeft front axle
MOT3 Motor, DriveDrives right rear wheelRight rear axle
MOT4 Motor, DriveDrives right front wheelRight front axle
ORF1 Orifice, DownControls the platform rate of
descent
Valve Manifold
ORF2 Orifice, Cushion
Down
Slows the platform rate of descent
during the last 12 in. (300mm) of
platform lowering
Cushion Valve Block
P1 Pump, Hydraulic Provides fluid power for hydraulic
system
Rear of engine
P1 Pump, Brake
Release
Release Brakes ManuallyRear of Chassis
RV1 Relief Valve, Main Provides overpressure protection to
Pump
Valve Manifold
RV2 Relief Valve,
Steering
Provides overpressure protection to
steering components
Valve Manifold
RV3 Relief Valve, Rear
Drive Cross
Provides overpressure protection to
drive motors during turning
Mounted behind
hydraulic tank
RV4 Relief Valve, Front
Drive Cross
Provides overpressure protection to
drive motors during turning
Mounted behind
hydraulic tank
RV5 Relief Valve, Fore/
Aft Tilt
Provides overpressure protection
for forward leveling
Auxiliary Valve
Manifold
SV1 Shuttle ValveProvides oil to brakes when either
drive FORWARD or REVERSE are
actuated.
Valve Manifold
V1 Valve, Steering Provides directional control for
Steering Cylinder
Valve Manifold
V2 Valve, Forward
Counterbalance
Prevents machine from running
away on slopes and also cushions
stops
Valve Manifold
V3 Valve, Rev e rse
Counterbalance
Prevents machine from running
away on slopes and also cushions
stops
Valve Manifold
V4 Valve, Forward Provides directional control of oil for
forward drive
Valve Manifold
V5 Valve, Reverse Provides directional control of oil f or
reverse drive
Valve Manifold
V6 Valve, Velocity Fuse Locks Lift Cylinder if line breaks Lift Cylinder
V7 Valve, LiftProvides oil flow to Lift Cylinder Valve Manifold
V8 Valve, DownAllows oil to flow out of Lift Cylinder
to tank
Valve Manifold
V9 Valve, Proportional Prevents oil from bypassing while
driving or lifting
Valve Manifold
V10 Valve, Brake
Release
Allows use of brake release pump
by closing return circuit
On front of brake
release pump assy.
V11 Valve, Axle Float Allows Axle Cylinder to float when
energized, locks Axle Cylinder
when not energized
Mounted on side of
hydraulic tank
V12,13 Valves, Series/
Parallel
Shifting both valves changes the oil
flow from hight torque (parallel) to
high speed (series).
Valve Manifold
V14 Valve, Brake
Pressure Reducing
Drops system pressure to 390 psi
(27 bar) for proper Brake operation
Valve Manifold
V15 Valve, Cushion
Down
Closes to send oil thru Cushion
Down Orifice, slowing platform rate
of descent for the last 12 in.
(305mm)
Valve Manifold
V16 Valve, Steering
Dump
Directs oil to platform leveling or
steering valves
Auxiliary Valve
Maniold
V17 Valve, Fore/Aft Tilt Provides direction control of oil for
fore/aft platform leveling
Auxiliary Valve
Manifod
V18 Valve, Side/Side Tilt Provides direction control of oil for
side/side platform leveling
Auxiliary Valve
Manifod
DESIGNA
TION
NAMEFUNCTIONLO CATION
Page 53
SL26/30SL Work Platform5-5
S
CHEMATICS
Section
5.2
Figure 5-3: Hydraulic Schematic (064148-022)
CYL4
CV5
CV6
RV5
V17
FD3
RV2
V16
V18
CYL5
CV7
CV8
CYL3
CV4
CV3
V11
CYL1
CYL2
V6
V15
ORF2
PS1
V7
V8
ORF1
V1
FD1
P1
FL2
FL1
RV1
V9
V4
V5
SV1
V2
V3
CV1
V14
P2
FD2
V12
V13
MOT1
MOT2
MOT3
MOT4
RV3
RV4
BR1
BR2
Figure 5-4: Hydraulic Manifold, Exploded View
CV1
V9
ORF1
V14
V15
ORF2
FD1
RV5
FD2
Front
Top
RightSide
LeftSide
Bottom
Rear
RV1
PS1
FD3
V1
V17
V18
V4
V7
V8
V5
SV1
V2
V3
CV2
RV2
V16
V12
V13
Fore/Aft Tilt Valve
Side/Side Tilt
Valve
Steering Valve
Lift Valve
Down Valve
Flow Divider/
Combiner
Reverse Valve
Forward Valve
Cushion Orifice
Cushion Down
Valve
Brake Pressure
Reducing Valve
Down Orifice
Brake Check Valve
Reverse
Counterbalance Valve
Proportional Valve
Steering Flow
Divider
Fore/Aft
Relief Valve
Lift Check Valve
Steering Relief
Valve
Steering Dump
Valve
Series/Parallel
Valve
Series/Parallel
Valve
Shuttle Valve
Forward
Counterbalance
Valve
Lift Pressure
Switch
Main Relief
Valve
Tilt Flow Divider
Page 54
5-6SL26/30SL Work Platform
S
CHEMATICS
Section
5.2
N
OTES
:
Page 55
Section 6
I
LLUSTRATED
P
ARTS
B
REAKDOWN
Introduction
This section lists and illustrates the replaceable assemblies and parts of this product, as manufactured by UpRight, Inc.
Each parts list contains the component parts for that assembly.