Rolls-Royce Silver Shadow
B
Bentley
T
Series
Workshop
Manual
3.
Energise the solenoid to bring the drive
assembly into
tile
engaged position. Measure the
distance between the pinion and the thrust collar
on the armature shaft extension. This measurement
must be taken with the pinion pressed lightly
toward the arniature to take up any slack in the
engagement linkage. The correct setting for this
distance should be 3,404 mm. to 3,658 mm.
(0.134 in. to 0.144 in.) on 17 and 19s solenoids,
0,254 mm. to 0,508 mm. (0.010 in. to
.020 in.) on
15s solenoid.
4.
To adjust the setting, slacken the
eccentric
pivot pin lock-nut and turn the screw until the
required setting is obtained. The arc of adjustment
is
180°therefore ensure that the head of the arrow
marked on the pivot pin is set only between the
arrowed ends of the arc scribed on the drive end
bracket casting. After setting, ensure that the
eccentric pivot pin lock-nut is tightened.
5. Re-check the setting.
Starter solenoid contacts-To check
When carrying out the following checks it must be
assumed that the pinion travel has been correctly
set.
1.
Remove the copper link, connecting solenoid
terminal
'
STA' with the starter motor terminal and
connect terminal
'
STA' to earth.
2.
Connect a
12
Volt D.C. supply, between the
small unmarked solenoid terminal and earth.
3.
Connect a 12 Volt 15 Watt test lamp in
circuit.
4.
Insert a stop in the drive-end bracket to
restrict the pinion travel to that of the normal
out-of-mesh clearance. An open-ended spanner can
be used with its jaws embracing the armature
shaft extension.
5.
Close the switch to energise the solenoid.
6.
The solenoid contacts should close and remain
fully closed, as indicated by the test lamp being
switched on and emitting a steady light.
7.
Switch off and remove the stop.
8.
Switch on and hold the pinion assembly in the
fully engaged
positi~~n
9.
Switch off
and
t~bserve the test lamp.
10.
The
solellold contacts should open, as
indicated by the test lamp being extinguished.
Starter motor-To fit
Important
Ensure that any existing packing
pieces are fitted as they provide
the correct clearance between the
starter motor and the flywheel. If a
new starter motor is to be fitted or
the original packing pieces have
been mislaid proceed as follows.
(see
Fig.
M17
)
Chapter
M
1.
hleasure the distance from the mounting face
on the crankcase to the edge of the flywheel. If
this measurement is 3,706 cm. (1.459 in.) or
less, two packing pieces should be fitted. If the
measurement reads between 3,709 cm. (1.460 in.)
and 3,807 cm. (1.499 in.), one packing piece should
be fitted.
2.
Packing pieces are not required when the
measurement exceeds 3,810 cm. (1.500 in.).
On completion, fit the starter motor and packing
pieces, reversing the procedure given for removal.
Starter motor-Solenoid operated switch
Model
2.S.T. and 4.S.T.
The unit is a factory sealed item and requires no
service other than to ensure that all electrical con-
nections are clean and correctly tightened.
If
the
unit is
fouild to be faulty, it should be renewed.
Switch Model 2.S.T.-To remove
Cars prior to Car Serial Number SRH 5500,
SBH 5517, SRX 6771 and LRX 6724
1.
Disconnect the battery.
2.
Disconnect the electrical connections, noting
the cable colouring to facilitate fitting.
3.
Remove the two setscrews securing the
switch.
Switch Model 4.S.T.-To remove
Cars from Car Serial Number SRH 5500,
SBH
5516, SRX 6770 and LRX 6724
1. Disconnect the battery.
2.
Disconnect the electrical connections, noting
the cable colouring to facilitate fitting.
3.
Remove the two 2.B.A. nuts, bolts and washers
securing the switch to the accelerator bracket.
Switch-To test
1.
Connect a variable Zero to 12 Volt D.C. supply
to the main terminals.
2.
The plunger must be attracted fully home at
between 5 and 9 Volts.
3.
After raising the voltage to 12 Volts, the
plunger must release at less than 2.5 Volts.
4.
The value in ohms of the solenoid winding,
measured from the
2.B.A. terminal and the switch
body is 2.1 to 2.5 ohms at
20°c (68O~.).
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