T-SM47j P41/54
T20-a
OPERATION TABLE
6.5.2.9 Drive belt guide needle bearing
To replace a traverse drive belt guide needle bearing (item
24 of Fig. 6.7) proceed as follows:
i. Remove the motor assembly as detailed in section
6.5.2.1 parts ‘i-ii’.
ii Remove the two nuts on the shoulder screws (item
26 of Fig. 6.7) and release the two needle bearings.
iii Replace the new bearings, pack with grease (part
number 110477) and reassemble the motor assembly
(use threadlock part number 670650 on screw threads
and note any applicable torque values) noting part
orientation as shown in Fig. 6.7.
iv Reassemble as section 6.5.2.1 parts ‘v-viii’.
v Test all table functions.
6.5.2.10 Attachment blocks
To replace an attachment block if the guide pin location
hole is worn or if the block is damaged, proceed as follows:
i Remove the appropriate sections top cover as
6.5.2.6 parts ‘i-ii’.
ii Remove the sections black top.
iii Remove the black tops location dowel using a
jacking screw if required and then all the button head
screws securing the attachment block.
iv Remove the ‘R’ clip and dismantle and remove all
the push button components as 6.5.2.7.
v Slide out the attachment block and replace it with
the new one. Reassemble the push button
components as 6.5.2.7.
vi Reassemble the table by reversing the above (use
threadlock part number 670650 on screw threads
and note any applicable torque values shown in
Fig. 6.5 and 6.6 ).
vii Test all table functions.
6.5.2.11 Black tops
To replace a black top if damaged, proceed as follows:
i Remove the appropriate sections top cover as
6.5.2.6 parts ‘i-ii’.
ii Remove the sections black top and replace it with
the new one.
iii Reassemble the table by reversing the above (use
threadlock part number 670650 on screw threads
and note any applicable torque values shown in
Fig. 6.5 and 6.6 ).
iv Test all table functions.
6.6 ELECTRICAL COMPONENTS
WARNING
Ensure correct procedures are used if mains
voltages are exposed. Take care when handling
or getting close to PCAs as some components
can become hot enough to cause burns. When
testing the table take care that any attached
leads or cables do not constitute a tripping
hazard. Also see safety warnings section 4.0.
CAUTION
Do not power any motor directly from the
batteries if movement is near to either end of
its limit without ensuring that the direction of
movement is away from that limit.
6.6.1 The following parts may need replacement in the
event of failure (see notes below in each section for test
details prior to removal). The procedures for replacement
are detailed in the following sections:
6.6.2 Three actuator PCA
6.6.3 Four actuator PCA
6.6.4 Infrared receiver PCA
6.6.5 Power supply assembly
6.6.6 Traverse motor
6.6.7 Break motor
6.6.8 Tilt and Trendelenburg motors
6.6.9 Telescopic column assembly
6.6.10 Break potentiometer loom
6.6.11 Tilt potentiometer loom
6.6.12 Trendelenburg potentiometer loom
6.6.13 Height potentiometer loom
6.6.14 Traverse motor loom & m’switches
6.6.15 Connector block assemblies & looms
6.6.16 Switch and accessory panel looms
6.6.17 Column energy chain and loom
6.6.18 Break gearbox loom
6.6.19 Batteries
6.6.20 Fuses
6.6.21 Table infrared, code change
6.6.22 Infrared handset, code change
6.6.23 Handset service
6.6.24 Processor PCA
6.6.25 Standby panel and loom
During part replacement ensure that all assembly notes
are followed with respect to lubrication and torque values.
The chart in Appendix 2 gives a guide on what aspects
need to be considered in terms of programming, configuring
and calibration for most items that may need to be replaced.
Also note Appendix 3 (the schematic diagrams) and
Appendix 4 (Electrical safety checks).
Note: Potentiometers can be tested before replacement
as detailed in the ‘Application software manual’.
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