Rolls-Royce Corniche - M 4 Starter Motor M; Maintenance; Starter Motor-To Dismantle; Starter Motor-To Remove

Rolls-mce Silver Shadow & Bentley T Series
Workshop Manual
Maintenance
The starter motor will operate for long periods
before requiring attention and should need servicing
only during major engine overhauls but a check
should be made from time to time to ensure that the
electrical connections are secure and clean.
Starter motor-To test in position
Starter motor cranks the engine, but at reduced
speed.
1.
Check the condition and connections of the
battery.
2.
Check the electrical connections on the
starter circuit.
If the performance is still unsatisfactory after
the previous checks, remove the starter motor from
the car and check the starter motor as described in
Starter motor
- To bench test.
Starter does not crank the engine
1.
Cherk the c.ondition and connections of the
battery.
2.
Check the rlectrical (onnections on the
starter circuit.
3.
Disconnert the low tension (negative) lead
from the ignition coil.
4.
Connect a Zero tr, 20 Volt moving coil
voltmeter betwr.cn the starter solenoid switch main
input terminal and earth.
5.
Operate the starter motor and record the
voltmeter reading.
6. Transfer the voltmeter positive lead from the
starter solenoid switch main terminal on to the
small setscrew terminal.
7.
Again operate thc starter motor and record the
voltmeter
reading.
Chapter M
Section M4
STARTER MOTOR
Note The voltage measured in Operation 5
should not exceed by more than 0.6
volt the voltage measured in
Operation
7.
If battery voltage is riot available, trace the
fault. If the external circuits are
found to be
satisfactory and the starter fails to operate, the
starter must be removed and examined.
Starter motor-To remove
1
Place the car on a ramp or over- a suitablr pit.
2. Disconnect the battery.
3.
Remove the electrical connec.tions from the
starter motor.
4.
Remove the three setscrews and washers which
secure the starter motor, then from beneath
lhe car,
lower the starter motor between the engine and
front sub-frame sidemember.
5.
Remove the packing piece(sl fitted between
the starter rnotor flange and the c~ankcase end face,
(if fitted).
Starter motor-To dismantle
(see Fig.
M10)
1.
Remove the bolt, nut and washer and remove
the end cover and sealing ring from the front of the
starter motor.
2.
Disconnect the flexible copper link between
the lower solenoid terminal and the starter motor
yoke; remove the brush inspection cover and
carefully lift out the brushes.
3.
Remove the two.nuts securing the solenoid
and withdraw the solenoid from the drive-end bracket
casting, carefully disengaging the solenoid plunger
from the starter drive engagement lever.
4.
Remove the two 'through' bolts from the
comniutator end bracket, then remove the commutator
end bracket and yoke from the intermediate drive-end
bracket.