Rolls- Royce Silver Shadow
B
Bentley
T
Series
Workshop
Manual
Chapter
M
I).
Examin? tllc rubbrr seal for perishing, damage
and signs that
it
is
losing
its
resilience.
6.
Examincs thc chain sprockets for wear by com-
paring
them with a new one.
7.
Visually chrck the brake pad for cracks and
for excessive wear by comparing with a new one.
Also ensure that the pad
projec.tions move freely
in
the guide plate.
8.
Thoroughly wash the small ball braring in
clean petrol or white spirit (not paraffin) and
examine for corrosion and signs of pitting.
If
the
condition of the bearing
is
satisfactory it should be
smeared with
'
Rocol'
MT
265 grease then wrapped
in greaseproof paper until required tor use.
9.
Peel back the rubber cover surrounding the
electric motor and examine the general condition of
the
brnshgear and commutator. If these components
are in poor condition or if their serviceable life is
limited, a service exchange motor should be fitted.
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 blown off with
dry compressed air; ensure that the spent air is
directed away from the working parts of the motor.
10.
If the brush contact surface of the commutator
is
ligh~ly scored or blackened by embedded carbon,
the brushes should be lifted away from the contact
surface and a piece of fine glass paper wrapped
around the commutator; the working surface of the
paper should be towards the commutator, on no
account should emery cloth or a similar abrasive be
used.
11.
Apply light pressure to the glass paper and
simultaneously rotate the armature; continue to do
this until the surface of the commutator is
thoroughly clean and free from score marks. Remove
particles of dust and dirt, using dry compressed air
and ensuring that the spent air is directed away
from the working parts of the motor.
12.
Check that the carbon brushes are perfectly
free in their holders; if any tight spots are felt. the
brushes should be manipulated until they move
freely.
13. Fit the rubber covering.
Important
When peeling back the rubber cover,
care must be taken not to touch the
thermal cut-out; if the blade is
flexed, the accuracy of the setting
cannot be
guarantiled.
14.
On later cars having permanent magnet motors,
if
a motor is faulty or suspect
it
should be replaced
by a serviceable motor.
Electrically operated window lift
-To assemble
Reverse the procedure given for dismantling, noting
the following points.
1.
The end float in the lower sprocket spindle
should be between
0,13 mm. and 0,25 mm. (0.005 in.
and 0.010 in.). To obtain this end float an
adjustment washer is provided between the thrust
washer and the lower sprocket.
2.
The nut securing the brake disc to the worm
drive spindle should be tightened to the standard
figure quoted in Chapter
P
-
Torque Tightening
Figures.
Note that the spanner
(RH
7819) will be required
to hold the serrated end of the worm shaft while
the nut is being tightened.
3.
The chain tension should be set so that, with
finger pressure, the chain can be moved approxi-
mately
6,35 mm. (0.25 in.) on either side of its
normal running position.
4.
This adjustment should be carried out by using
the special tool
(RH
7769). Fit the tool over the top
of the upper sprocket bracket so that the feet of the
tool locate under the sprocket centre boss. Slacken
the two setscrews securing the upper sprocket
bracket and rotate the centre of the special tool
until the above mentioned setting is obtained, after
which the two setscrews should be tightened and
the tool removed.
5.
Shims
should be fitted between the spacer and
the brake guide plate to give a
025 mm. (0.010 in.)
minimum clearance between the brake disc and the
brake guide plate.
6.
The sprocket bearing and chain should be
lubricated with
'
Rocol' MT
265
grease; the worm,
worn bearing and worm wheel teeth should be
lubricated with either
'
Esso Beacon' or
'
Aeroshell'
grease.
To Next Page
Loading...
Need help?
General
