Eschmann MR, MRS User manual

MR & MRS

OPERATION TABLE

Service manual

699255

T-SM5f

Preliminary

The Serial Number

Plate is located on the

pedestal as indicated.

Technical data

Safety notes

Maintenance

Eschmann After Sales Service Department

The Eschmann After Sales Service Department is staffed and equipped to provide advice and
assistance during normal office hours. To avoid delays when making enquires, please quote the
Model and Serial Number of your Operation Table which is shown on the Serial Number plate, the
location of which is shown below. Please ensure you include all alpha and numeric digits of the
Serial Number.

For further information visit www.eschmann.co.uk

All correspondence relating to the after sales service of Eschmann Equipment to be addressed to :

UK Customers

Eschmann Equipment, P eter Road, Lancing, West Sussex, BN15 8TJ, England.
T el: [phone]. Fax: [phone].

Overseas Customers

Contact your local distributor . In case of doubt contact Eschmann Equipment.

Trade marks

“MR” and “MRS” ar e t rade marks of Eschmann Holdings Limited.

Copyright © 2001

All rights reserved. This booklet is protected by copyright. No part of it may be reproduced, stored in a
retrieval system or transmitted in any form or by any means, electronic, mechanical, photocopying,
recording or otherwise without written permission from Eschmann Holdings Limited.
The information in this publication was correct at the time of going to print. The Company, however,
reserves the right to modify or improve the equipment referred to .

If the CE mark is affixed to the product, it indicates compliance with Council Directive
93/42/EEC of 14 June 1993 concerning medical devices.

Service Manual

T-SM5f November 2001

MR & MRS OPERATION TABLES

READ THESE INSTRUCTIONS BEFORE USE
Keep these Instructions in a safe convenient place for future reference. Read in conjunction
with the relevant Publications detailed in the preliminary information section.

CONTENTS

Page

1. PRELIMINARY .. .. .. .. .. 4

2. TECHNICAL DATA .. .. .. .. 5

3. SAFETY NOTES .. .. .. .. .. 6

4. MAINTENANCE .. .. .. .. .. 7

General .. .. .. .. .. .. .. 8

Cleaning, disinfection, care and storage .. 8
Periodic lubrication, checks & adjustment .. 8

Base Components .. .. .. .. .. 8

Castors and wheels .. .. .. .. .. 8

Brakes and brake mechanism .. .. .. 8

Hydraulic cylinder .. .. .. .. .. 8

Gears .. .. .. .. .. .. .. 10

Hinge pin and nut .. .. .. .. .. 11

Lateral screw and nut .. .. .. .. 11

Trend. screw assembly friction collars .. 12

Chair and Break screw assembly .. .. 14

Control arm - cable type .. .. .. .. 14

Control arm - gas spring .. .. .. .. 14

Emergency operation - MRS only .. .. 16

Head / Leg section and catches .. .. 16

Fault diagnosis and remedies .. .. .. 17

Excessive rotational movement of table top

Inability to raise table top.. .. .. .. 17

Table top not maintaining height .. .. 18

Operation table will not lower .. .. .. 18

Failure of control arm cable .. .. .. 20

Control arm - gas spring .. .. .. .. 20

Removal & installation of components .. 20

Replacement of trend, screw .. .. .. 20

Removing hydraulic cylinder from base .. 21

Replacing ram cup washer .. .. .. 21

Removing and cleaning ball valve .. .. 21

Changing hydraulic oil .. .. .. .. 21

Replacing control arm cable .. .. .. 22

Replacing an antistatic wheel in base .. 22

17

Page

Replacing castor .. .. .. .. .. 22

Replacing worn brake pad .. .. .. 22

Replacing brake quadrant.. .. .. .. 23

Replacing quadrant pinion .. .. .. 23

Replacing broken quadrant pillar .. .. 23

Replacing main control handle .. .. 23

Replacing push-button catches.. .. .. 24

Replacing fine control handwheel .. .. 25

Replacing release handle/bar (old) .. .. 25

Replacing release handle (head new) .. 27

Replacing release bar (leg new) .. .. 28

Replacing gas spring (head/leg section) .. 28

Replacing gas spring (control arm) .. .. 28

Hydraulic system operation notes .. .. 28

ILLUSTRATIONS

Fig.1 MR Operation table (G.A.) .. .. 4

Fig.2 MRS Operation table (G.A.) .. .. 4

Fig.3 MR table - Parts and controls .. .. 7

Fig.4 Ram key adjustment .. .. .. .. 8

Fig.5 Base assembly .. .. .. .. .. 9

Fig.6 Gearbox of MR table .. .. .. .. 10

Fig.7 Hinge pin and nut adjustment .. .. 11

Fig.8 Lateral screw and nut adjustment .. 11
Fig.9 Releasing Trend. screw assembly .. 13
Fig.10 Trendelenburg screw assembly .. 13
Fig.11 Control arm (early MRS table) .. 15

Fig.12 Removing hydraulic cylinder .. .. 15

Fig.13 Hydraulic cylinder assembly .. .. 16

Fig.14 Ram release mechanism .. .. .. 17

Fig.15 Control arm cable replacement .. 19

Fig.16 Replacing a control handle .. .. 24

Fig.17 Catch mechanism for leg section .. 24
Fig.18 Head section without gas spring .. 25

Fig.19 Head section with gas spring .. .. 26

Fig.20 Control arm with gas spring .. .. 27

Fig.21 Hydraulic system operation .. .. 29

T-SM5f Page 3 of 29

Part 1

MR & MRS OPERATION TABLES

1. PRELIMINARY INFORMATION

1.1 These Instructions for Use should be referred to for details of the MR and MRS general purpose, four­section, mobile, operation tables, REF 80-085-15, 80-085-63 and 80-081-16 (serial numbers MRAB8E0000,
MRRB8E0000, MSAB8E0000 respectively, or above) and fixed base MR tables 80-085-92 and 80-085-96.
Information is also provided for earlier versions (within each section) if applicable.

1.2 This Manual covers both the MR and the MRS operation tables. The controls for the MRS tables are
fitted on an adjustable, extended control arm. There are two versions of the control arm which are both described,
however the later version only is now available. The MR table is also available in a reduced height version.

1.3 Instruction and Service Manuals should be readily accessible for reference prior to and when operating,
cleaning and servicing the Operation Table. All manuals are available from Eschmann Equipment, see inside
front cover for address details.

Related Technical Publications:-

Instruction for Use - MR and MRS Operation Tables - T-IM18
Illustrated Parts List - MR and MRS Operation Tables - T-IPL6

1.4 MR and MRS Operation Tables comply with BS6859 Part 1: 1987 (except for clause 7).

1.5 Fixed base tables should be serviced as conventional tables but check that the floor fixings are secure on
a regular (three month) basis, also check the antistatic resistor for function and connection and replace the base
seal if it becomes damaged..

Oil filler cap

Fig. 1 MR Operation Table : General Arrangement

Fig. 2 MRS Operation Table : General Arrangement

Page 4 of 29 T-SM5f

MR & MRS OPERATION TABLES

2. TECHNICAL DATA

DIMENSIONS AND MOVEMENTS

Part 2

TABLE LOADING

Retention of Adjusted Height: The table will
retain its adjusted height with a load of 135kg
uniformly applied to the trunk sections.

NET WEIGHT (approx) 196kg X-RAY ATTENUATION

Longitudinal Deflection Load: The table will
withstand a load of 50kg applied at a point 150mm
in from either end of the head or leg section.

The X-ray attenuation of the top of this operation
table is equivalent to less than 0.5mm of 99.5%
pure aluminium.

T-SM5f Page 5 of 29

Part 3

MR & MRS OPERATION TABLES

3. SAFETY NOTES

Attention to the following points will prolong the life and efficiency of your operating table and
will help to avoid the risk of accidents, or damage:

DO:

♦ Keep the instruction manual close-to-hand.
♦ Read the instructions carefully before using

the table.

♦ Check that the leg section is secure, and put

the table base in the brake position before
use.

♦ Raise the table top fully before washing the

table, to expose all the ram covers surface.

♦ Read and follow the instructions for cleaning,

and for the care of the mattresses and pads.

♦ Use the correct mattress and accessories.
♦ Service the table and accessories regularly.
♦ Remove table accessories and their clamps,

in particular rotary clamps from side bars,
when they are not in use.

WARNINGS

The MR and MRS Operation T ables have been designed to minimise the possibility of accidental
electrosurgery burns. Contact with any metal surfaces (e.g. table side bars, or other equipment
etc.) can cause burns during electrosurgery and must be avoided.

DO NOT:

♦ Lift the table by its top.
♦ Push the table over rough surfaces, use a

trolley.

♦ Drop the table (or individual sections) when

transporting it.

♦ Put heavy weights on the table sections.
♦ Put sharp objects on, or against mattresses,

pads, or the radiographic table top.

♦ Drop heavy objects onto the radiographic

top.

♦ Spill oil, ether, or other chemical fluids onto

the mattress or the pads.

♦ Pull the table by the head or leg section,

always push it.

♦ Exceed maximum table loading

The MR and MRS Operation Tables have been designed for patients weighing up to 135kg with
their centre of gravity (normally the perineum) over the base. However patient positioning and
additional loads can compromise table stability . Ensur e that loading does not compromise table
stability.

With the table in (or during transition into) the castor position, the centre of gravity of the
patient (normally the perineum) should lie over the centre of the column . Whenever this is not
practical the overhanging weight of the patient and table should be adequately supported (e.g.
by at least two able people). Take extreme care when moving a table with a patient on and
ensure that the table is at minimum height

The patient’s weight should be supported whenever the sections are adjusted or removed from
the table during repositioning.

The head and leg sections are designed to support and position the appropriate part of the
patient’s weight only . Damage leading to failur e of the section may be caused if excessive weight
is applied. Also do not sit or lean on the control arm of the MRS table.

The maximum loading weight of 10kg must not be exceeded for the Detachable ophthalmic head
flap and the Non-Detachable head flap accessories, as this may cause damage to the accessory
and could result in injury to the patient.

It is necessary to check at regular intervals for wear, corrosion, material fatigue and ageing on
all accessories which support all or part of the body of the patient using a single gas spring. Such
accessories are the detachable ophthalmic head-flap and head-flap.

Page 6 of 29 T-SM5f

MR & MRS OPERATION TABLES

4. MAINTENANCE

Part 4

15

10

3

1

14

13

12

11

2

7

4

5

6

9

1 Head Section
2 Upper Trunk Section
3 Lower Trunk Section
4 Leg Section
5 Quick-release Bar (Leg Section Angle)
6 Release Button, L.H. (Leg Section)
7 Oil Filler Cap
8 Base

Fig. 3 MR Operation Table : Part identification and controls

8

9 Height Control Pedal
10 Base Control Pedal
11 Cylinder Locking Lever
12 Main Control Handle
13 Gear Lever
14 Release Button, R.H. (Head Section)
15 Quick Release Bar (Head Section Angle)

T-SM5f Page 7 of 29

Part 4

MR & MRS OPERATION TABLES

4. MAINTENANCE

GENERAL

4.1 The information provided in this Service
Manual falls into four categories:

♦ Cleaning, Disinfection, Care and Storage.
♦ Periodic lubrication, checks and adjustments
♦ Fault diagnosis and remedies
♦ Removal and installation of components

CLEANING, DISINFECTION, CARE AND
STORAGE

4.2 For Cleaning, Disinfection, Care and
Storage instructions refer to Section 8 of the
Instructions for Use (Publication T-IM18, also see
section 1.3).

PERIODIC LUBRICATION, CHECKS
AND ADJUSTMENTS

Base Components

4.3 In order to carry out maintenance procedures
to the table base, it is necessary to tilt the table on
its side and expose the underside of the base.
Proceed as follows:

Brakes and brake mechanism

4.5. Check the action of the brake mechanism
(see Fig. 5) and also check for wear on the brake
pads, broken brake pinion or quadrant teeth, play
in the quadrant taper pins and adjustment between
quadrant, roller and eccentric pin. Check stop
screws for wear. To replace quadrant see section

4.44; to replace quadrant pinion, see section 4.45.

4.6 Fit new brake pads where necessary,
referring to section 4.43.

Hydraulic Cylinder

4.7 Raise the table top to its maximum height,
then depress the height adjustment (hydraulic
pump) pedal fully and check for smoothness and
rate of descent.

i Remove the head and leg section in the

normal manner (see Instruction for Use,

Publication T-IM18).
ii Raise the table top to its maximum height.
iii Place an anaesthetist’s stool, or similar strong

support, alongside the table.
iv Place the brake pedal in the ‘castor’ position.
v Stand on the same side of the table as the

support but with the pump lever on the

opposite side. Push the table away about

30 cm and then pull it back. This ensures

that all the castors are pointing away from

the operator. Two people on the same side of

the table as the support (one at each end) can

now each place a foot against the base and

lever the table over gently, lowering it onto

the support.

Castors and wheels

4.4. Clean each castor (see Fig. 5) and wheel free
of debris, then lubricate the castor and wheel ball
races with a light machine oil (or WD40 aerosol
lubricant).

Fig. 4 Ram key adjustment

4.8 Raise the table top to its maximum height
again and release the ram cover securing screws
at the top. Refer to Fig. 4 and lower the 3-section
telescopic cover (1) to expose the ram (2) and ram
key (3).

4.9 Remove the ram key , clean out keyway and
refit key .

4.10 Examine ram surface for rust and, if present,
clean off with fine emery cloth. (Note: Later rams
have a black surface coating do not confuse this
with rust and attempt to remove it). Lubricate
exposed surface of ram. Seal the top of the cylinder
with cloth wound round the ram to prevent damage
if using emery cloth.

Page 8 of 29 T-SM5f

MR & MRS OPERATION TABLES

4. MAINTENANCE

Part 4

DETAIL A

DETAIL C

DETAIL B

1. Base casting 8. Wheel spindle 15. Oil sump

2. Base cover 9. Base control pedal 16. Roller

3. Castor frame 10. Brake pad screws 17. Quadrant securing nuts

4. Castor 11. Brake pad 18. Brake shaft collars

5. Castor mounting screw12. Stop screw 19. Eccentric pin

6. Wheel 13. Pinion 20. Quadrant pillar
7a/b. Grub screws 14. Quadrant

Fig. 5 Base assembly

T-SM5f Page 9 of 29

Part 4

MR & MRS OPERATION TABLES

4. MAINTENANCE

4.11 Before refitting ram cover , check that table
will raise and lower smoothly. If this is not the
case, the ram key is probably secured too tightly .
Release the key attachment bolts (4) slightly to
remove excessive friction, then retighten.

4.12 Check for signs of oil leaks. If table will
not pump to its full height, refill reservoir with
the Eschmann oil supplied with the table, in small
measures, lowering the table after each addition.
This will avoid the risk of introducing too much
oil into the hydraulic system.

Gears

4.13 Check function of gear selector lever in
conjunction with main control handle and ensure
that each table top movement is satisfactorily
achieved. Check to see if there is any excessive
play in table top in any particular direction (see
section 4.14 and 4.15). This applies particularly
to the two grub screws (4, Fig. 10) securing
screwed bush to screw housing on Trendelenburg
and Break screw assemblies. Check friction collar
adjustment on Trendelenburg and Break screw
gears (see sections 4.16-4.19); also check that

1. Main control handle 9. Pivot gear, lateral tilt

2. Gear selector lever 10. Drive gear, lateral tilt

3. Selector shaft 11. Gear shaft

4. Trendelenburg idler gear 12. Drive gear , break

5. Break idler gear 13. Drive gear, Trendelenburg

6. Gear selector unit 14. T rendelenbur g screw and gearbox

7. Selector gear, lateral tilt 15. Break screw and gearbox (right hand)

8. Break screw and gearbox (left hand)

Fig. 6 Gearbox of MR operation table

Page 10 of 29 T-SM5f