Rolls-Royce Corniche - Lucas 6 W Wiper Motor Self-Parking-To Adjust; Windscreen Wipers, Motors and Washers M71

Rolls-Royce Silver Shadow 8 Bentley T Series
Workshop Manual
Chapter M
'Lucas' 6 W wiper motor self-parking-
To adjust
Section MI1
Care should be taken to ensure that the parking
procedure
adjustmc-nts are carried out in strict
accordance with the following procedure. Failure to
do this may result in irrepairable damage to the motor.
1.
With the wiper motor and ignition switch off,
adjust the parking switch by turning the knurled nut
until the switch threads protrude
20,32 mm.
(0.800 in.) from the cross-head (see Fig. M71). This
WINDSCREEN WIPERS,
MOTORS AND WASHERS
check can be assisted with a gauge inserted behind
the cross-head
(see Fzg. M71).
2.
Remove the wiper arms and blades, switch on
the motor and allow to operate for approximately
30 seconds, then switch to the parked position.
3.
Fit one wiper arm and blade to the right-hand
splined wheel box. The wiper blade and arm must
point to the left-hand side of the car. with the rubber
of the wiper blade lying alongside the rubber glazing
seal.
4.
Fit the other wiper arm and blade on to the
left-hand spindle.
The wiper blade must lie across the parking
gauge which should be held against the windscreen
and rubber glazing seal in line with the wiper blade
latch pivot
(see Fzg. 1!72). There will be some free
movement of the wiper arm and blade due to
' sponge'
in the rack
drive. This movement can be ignored if
the wiper blade can be set against the gauge as
described
pre\lously wlthout displacing the othe~
blade. If the left-hand wiper blade cannot be set
against the gauge
w~thout moving the right-hand
wi~er blade, it will br necessary to rnove the arni
6.
Ensure that the motor is not left in a stalled
condition. Proceed as follows to ensure that the
parking switch has operated, and that tlie wiper
motor is switched off. Remove Number
2 fuse from
the distribution board and connect
a test lamp of not
more than
12V. 2.2W. across the fuse retaining clips.
The test lamp should not illuminate. thus indicating
that the parking switch has operated and that no
current is flowing.
one spline further on the wheelbox spindle.
5.
Ensure that the windscreen is clean and that a
stt,ady flow of water is directed on to tlie screen,
then switch on the
wiper motor for a few seconds and
FIG. M70 'LUCAS' 6 W WIPER MOTOR
check that it parks satisfactorily.
1 Wiper motor 5-way plug & socket
Note The wiper niotor must not be operated
2 Earthing point
with a dry screen or scratching of the
3 Condenser
scrcen will result.
4 Parking switch adjustment screw