Rolls-Royce Silver Shadow
&
Bentley
T
Series
Workshop
Mama/
Seat mechanism-To inspect
All
cars
1.
Examine the links and link pins for wear and
fracture; worn pins will cause the mechanism to
rattle.
2.
Peel back the rubber covering surrounding the
motor and examine the general condition of the
brush gear and commutator. If these components are
in poor condition or if their serviceable life is
limited, a service exchange motor should be fitted.
3.
If the general condition of the motor is
satisfactory, the commutator and brushgear should
be cleaned with a petrol-soaked cloth and any
particles of carbon dust remaining should be blown
away with dry compressed air; ensure that the
spent air is directed away from the working parts of
the motor.
4.
If the surface of the commutator is lightly
scored or blackened by
embedded carbon, the
brushes should be lifted away from the commutator
and the commutator cleaned with a piece of fine
glasspaper. Do not use emery cloth or similar
abrasive.
5.
Apply li~ht pressure to the glass paper dnd
rotate the armature until the surface of the
commutator is thoroughly clean and free from score
marks. Remove particles of dust and dirt using dry
compressed air, ensure that the spent air is directed
away from the working parts of the motor.
6.
Verify that the carbon brushes are free in the
holders.
7. Fit the rubber covering.
8.
Thoroughly wash the bearing in clean petrol
or
white'spirit (not paraffin), then examine the
bearing for signs of pitting, corrosion or cracking of
the balls or tracks.
9.
Examine the bearing bgshes for signs of
excessive wear and replace if necessary. Before
removing worn bushes, note their position relative
to their respective housing face to ensure correct
assembly of the new bushes.
10. Examine the worm and wheel for worn
or
damaged teeth.
E
9.
Seat mechanism-To assemble and fit
All
cars
Reverse the procedure given for removal and
dismantling, noting the following points:
1.
The worm and wheel gear should have a
backlash of between 0,08
mm.
and 0,18
mm.
(0.003 in. and 0.007 in.).
Chapter
M
non-electrical working parts should be lubricated
with
'
Rocol'
MT
265
grease, the actuating screw
should be lubricated with 'Moly tone' anti-scuffing
paste.
Extreme care must be taken not to disturb the
thermal cut-out
(bimetal blade, slightly concave,
approximately 12.70 mm.
x
19.05 mm. (0.5 in.
x
0.75 in.) with a contact at the centre).
Do
not
attempt to operate this switch by hand, any cold
mechanical operation will alter the current/
thermal switching characteristics.
0
2.
With the exception of the actuating screw all
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