P24/54 T-SM47j
Note: The trunk sections may become unstable
when the M10 screws are removed and extreme
care should be taken. Ensure trunks sections are
supported during removal of these screws.
vi Remove the two top location angles (item 15 of Fig.
6.3) and carefully remove the bellows by lifting them
up and off the top of the column.
6.2.5.2 Replacing the bellows
Replace the bellows by reversing the removal sequence
ensuring that the trunk sections are replaced in the correct
orientation (short trunk section at leg end). Note that the
four M10 fixings screws should be tightened to a torque
setting of 48Nm. Also ensure that the sprung electrical
contact pins on the underside of the long trunk section are
not damaged, use threadlock (part number 670650) on all
screws (except those securing the switch panel and the
accessory panel). Check that the bellows have been
correctly positioned in their top and bottom retainers and
that they work correctly by moving table (use handset not
standby panel) through several complete sequences of
extreme tilt and Trendelenburg movements. Test that the
telescopic covers move correctly, by powering the tabletop
up and down from minimum to maximum several times.
6.3 TABLE BASE COMPONENTS
6.3.1 The following parts on the table base may need
replacement in the event of wear, damage, or malfunction,
(see notes in each section) for the Power supply assembly
see section 6.6.5. The procedures for these are detailed
in the following sections:
6.3.2 Batteries
6.3.3 Pedal dampers
6.3.4 Front wheels
6.3.5 Castors
6.3.6 Brake pads
6.3.7 Castor pillar bushes
6.3.8 Pedal spindle bushes
6.3.9 Lifting roller assembly
6.3.10 Pedal catch block
6.3.11 Pedal anti-skid pads
6.3.12 Pedal catch pawl and spring
Fig. 6.2a shows the general arrangement for a table with
external pedal catches and Fig. 6.2b and Fig. 6.2c show
the general arrangement for a table with internal pedal
catches (Fig. 6.2c shows the new base arrangement for
tables having a Serial number prefix of T2AC or later).
These figures identify the main parts of the table base
assembly, refer to them as required. Ensure you refer to
the correct instructions according to the type of pedal catch
fitted to the table (also see section 6.1.9) and base
arragemnet according to table height. Always ensure the
correct parts are used during part replacement, refer to
the illustrated Parts list.
6.3.2 Batteries
IMPORTANT NOTE:
See section 6.6.26 (battery management system
reconditioning) before changing the batteries.
i Check fuses in the event of power failure before
replacing batteries (before removing or replacing
either battery inline fuse see section 6.6.26).
ii Ensure the table is switched ‘off’ at the main column
switch. If batteries are suspect do not change a them
unless they are obviously faulty using the following
notes as a guide.
a) The fully charged (single) battery voltage should
be at least 12.5V (or a series voltage of 25-27.5V
per pair) and a series voltage of between 23.5V
and 25.5V when powering the tilt motor (table
not loaded). To test the standby batteries press
and hold the standby battery switch whilst
operating the tilt motor via a handset.
b) Each battery within a pair should be at the same
voltage (i.e. within 0.5V of each other).
c) If the voltage of one battery is significantly lower
than the other (> 2V) change the Power supply
assembly.
iii When changing batteries always change them as a
pair (main or standby). Disconnect them at the inline
connector on the top of each battery.
iv Replace covers, if required recondition the battery
management system (see section 6.6.26) and check
table functions.
6.3.3 Pedal dampers.
To replace a pedal damper if operation of the associated
pedal shows sign of unit failure (pedal operation not
damped), or oil is visible during inspection of the base
during maintenance, refer to Fig. 6.2a or 6.2b as
appropriate and proceed as follows.
i Ensure both pedals are in the raised position.
ii Remove the appropriate base cover as detailed in
section 6.2.2.1.
iii To gain easier access for this procedure remove
the damper angle bracket from the table base plate
by removing its two retaining screws. This will enable
the damper to be swung out and up clear of its low
position making removal of the pivot pins easier.
iv Note the orientation of the spring clip on the piston
pivot pins, this is critical and must be copied when
replacing them (the limb of the clip should rest
against the pedal anchor block to stop any lateral
movement of the pedal assembly). Remove both
the pivot pins and the faulty damper.
v Replace the damper with a new unit (piston end to
the pedal anchor block end not the damper angle
bracket end). When replacing pivot pins apply grease
(part number 110477) and ensure the piston spring
clip is in the correct orientation as noted in ‘iv’ above.
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