P32/54
T-SM47j
xii
Reassemble table (see note below) by reversing the
above noting use of grease and threadlock in the
sections referred to and the warning at the top of
this section. Check Appendix 2 and proceed as
detailed in the ‘Application software manual’ before
replacing covers. Finally test all table functions.
Note: When replacing the wrapround assembly
tighten the four M10 screws (use of 4 x M10 spring
washers now preferred to threadlock) but do not
torque. Apply threadlock (part number 670650) to
the four slide bearing screws (at the lower edge of
the wrapround). Then whilst pushing the wrapround
diagonally, so that it is firmly pressed against all four
bearing pads, tighten the four slide bearings screws.
Finally torque the four M10 screws to 40Nm.
6.4.5 Tilt and Trendelenburg actuator motor
To replace a Trendelenburg or tilt actuator motor (see
section 6.6.8 for motor test details) refer to Fig. 6.3 and
proceed as follows:
i
Gain access to the top of the column as detailed in
section 6.2.3.
ii
Remove the motor cable spade connectors from
where they connect onto the four actuator PCA (note
two sizes to aid correct connection).
iii
Remove the two motor fixing screws to release the
motor assembly and then remove the motor mount
from the motor (two screws).
iv
Apply grease (part number 110477) to the worm.
Fasten the motor mount onto the new motor, apply
threadlock (part number 670650) to fixing screws.
v
Check condition of wheel whilst disassembled and
change actuator assembly if required. Apply grease
(part number 110477) to the wheel.
vi
Replace the new motor onto the location dowels
apply threadlock (part number 670650) to the fixing
screws.
vii
Reassemble table by reversing the above and test
all table functions.
6.4.6 Tilt bush
To replace a tilt bush (item 11a of Fig. 6.3) refer to Fig 6.3
and proceed as follows:
i
Note the warning in section 6.2.5 before continuing.
Remove the trunk sections and top location angles
as detailed in section 6.2.5 for bellows replacement
and the top of column cover (item 12 of Fig. 6.1).
ii
It is recommended that both bushes (items 11a,
Fig. 6.3) are replaced, one in the Trend frame front
beam and one in the Trend frame rear beam (items
2 and 3 of Fig. 6.3). Remove the ‘R’ clip and pin
from the top of the tilt actuator. Release the electrical
connections as required and ensure the loom from
the connector block is free from any fixing to the
table.
iii
Remove the connector assembly block (two screws)
and release the tilt potentiometer.
iv
Remove two screws at one junction of tilt frame end
beam and a tilt frame side beam. Then remove the
two screws diagonally opposite at the other junction
of tilt frame end beam and tilt frame side beam.
v
Slide off and remove the two pairs of tilt frame end
and side beam assemblies.
vi
Remove two screws at each junction of the
Trendelenburg frame beams and slide off the two
Trendelenburg frame assemblies.
vii
Note orientation and carefully tap out both tilt frame
headed bushes (always change as a pair) from the
Trendelenburg frame, replace them with new
bushes.
viii Reassemble by reversing the above using
threadlock (part number 113042) on all tilt and trend
gimbal frame screws and threadlock (part number
670650) on all other screws and grease (part
number 110477) on the bearings and actuator pins.
Ensure all loom cables are replaced as found, clear
of all moving parts. Check Appendix 2 and proceed
as detailed in the ‘Application software manual’
before replacing covers. Finally test all table
functions.
6.4.7 Trendelenburg bush
Note the warning in section 6.2.5 before continuing. To
replace a Trendelenburg bush (item 11b of Fig. 6.3) refer
to section 6.4.6, proceed as detailed but replace the two
Trendelenburg bushes (item 11b of Fig. 6.3) always
replacing them as a pair.
Note: It will also be necessary to remove the ‘R’ clip and
pin from the top of the Trendelenburg actuator and release
the connection on the four actuator PCA (on the column)
from the two potentiometers on the Trendelenburg frame
and ensure the loom from the potentiometers is free from
any fixing to the table. Replace and reconnect on assembly.
Check Appendix 2 and proceed as detailed in the
‘Application software manual’ before replacing covers.
Finally test all table functions.
6.4.8 Bearing pads
To replace the bearing pads in the wrapround assembly
proceed as follows:
i
Remove the wrapround assembly as detailed in
section 6.4.4 parts ‘i-viii’.
ii
Carefully tap out the four bearing pads and replace
them with new ones (always replace as a set of four).
iii
Reassemble the table by reversing the above noting
the assembly notes in section 6.4.4 parts ‘xi-xiii’.
iv
Check Appendix 2 and proceed as detailed in the
‘Application software manual’ before replacing
covers. Finally test all table functions.
Summary of Contents for T20-a
Page 1: ...T20 a OPERATION TABLE Service manual T SM47j 111707...
Page 11: ...T SM47j P11 54 T20 a OPERATION TABLE Fig 2 2 Maximum patient weight v table position graphs...
Page 12: ...P12 54 T SM47j Fig 2 3 Maximum patient weight v table position graphs...
Page 52: ...P52 54 T SM47j Fig A2 T20 a Schematic diagram Pedestal Section...
Page 53: ...T SM47j P53 54 T20 a OPERATION TABLE Fig A3 T20 a Schematic diagram Base Section...
Page 55: ......
