Workshop
Manual
Rolls- Royce Silver Shadow
&
Bentley
T
Series
Chapter
M
10.
Rcforc removing the
brushes, note their
position in order that they can be replaced correctly.
Note
?'he ridges on the running face of each
brush must be at right-angles to the
commutator slots.
11.
Lift the brush levers clear of their location at
the pivots and remove the brushgear assembly from
the yoke.
12.
The armature may now be removed from the
gearbox end bearing.
3.
Release thr
nut
which secures the rack tubing
to the wiper
motor.
4.
Slacken the clip which secures the motor and
withdraw the motor and rark from
the
car.
5.
Remove the plastic cover and the cover plate
from the wiper motor. It should be noted that care
must be taken not to introduce dirt into the gearbox
assembly.
6.
Remove the circlip and washer from the outer
end of the drive gear shaft
(see
Fig.
M74).
Discard
the circlip.
7.
Withdraw the gear and parking device assembly
from the motor, ensuring that any burrs around the
'Lucas'
6
W
wiper motor-To assemble
circlip groove of the gearshaft are removed before
Reverse the procedure given for dismantling, noting
withdrawal-
the following points.
Note
One of the following procedures should
1.
Lubricate sparingly the final gear and armature
now be followed dependant upon which
bearings with
'
Shell Turbo 41'.
part requires renewal.
2.
Grease liberally the cross-head guide channel.
connecting rod assembly, cable rack and gearbox
Replacement of gear and parking device
0
with
'
Rocol'
M.T.
265.
assembly. or renewal of motor (see Fig. M76)
1.
Fit the gear and parking device assembly into
'Lucas'
motor-To
measure
the motor, locating the drive rack on the peg of the
light running Current
connecting rod and ensuring that the parking switch
Proceed as for
'
Lucas' 6.W. wiper motor
-,
To
slide is fitted to the drive rack and is facing the
measure light-running current, noting the following
correct way, as shown in Figure
M74.
Note the
poicts.
position of anti streak mechanism on output gear
crankpin and ensure that it is refitted in the same
1.
With 12V at the motor the light-running current
position. If the pin is fitted
180
O
out, the tag will
at normal speed should read between 1 and
2
amps,
break on first park cycle,
and at high speed between
2
and
3
amps.
2.
Using grease from the motor gearbox, lubricate
(The bottom right blade in the motor socket is the
supply, the left offset blade is the return.).
Maintenance-'Lucas' 16
W
wiper motor
The motor is of a permanent magnet design and the
direction of rotation is dependent upon the polarity
of the electrical supply to its terminals. If it
becomes necessary to run the motor while it is
removed from the car,
the negative supply cable
should be connected to terminal
ma~ked number one,
the gear teeth.
3.
Fit the dished washer, plain washer and
circlip to the outer end of the gear shaft.
4.
Fit the plastic cover and the cover plate to the
wiper motor.
5.
Fit the motor and rack assembly to the car by
reversing the procedure given for removal. Ensure
that when the motor securing clip is tightened, the
alignment between the motor and the rack tubing is
not destroyed.
6.
Connect ihe loom socket to the wiper motor and
operate the wiper motor for a few seconds and then
switch off. This will ensure that the wiper
wheel-
boxes are in the parked position.
7.
Fit the wiper blades to the wheelboxes in the
parked position.
and the positive supply cable to terminal marked
number five for normal speed or terminal three
Drive-rack renewal
for high speed.
1.
Withdraw the rack from the motor.
2.
Fit the new rack, and re~lace the drive gear.
-.
fitting the dished washer, plain washer and using
'Lucas' 16
W
wiper motor-To remove
the new circlip provided. Ensure that the plastic-
parking switch operating slide is correctly located
(see Fig. M74)
by the arm on the rack, and that the slide is fitted
1.
Disconnect the loom socket from the wiper
the correct way around as shown in Figure
M74.
motor plug.
Note the position of anti streak mechanism and
2.
Remove both wiper blades. output gear crankpin.
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