Rolls-Royce Silver Shadow
B
Bentley
T
Series
Workshop
Manual
2.
The insu!aterl pair of brush holders on the
commutator end bracket should also be checked.
Clean off all traces of brush dust before testing.
Connect a 110 Volt A.C. test lamp between each
insulated brush holder and bracket.
If the lamp illuminates this indicates faulty
insulation, and the end brackets must be renewed.
Bearings-To renew
The bearings must be renewed if they are worn to
such an extent that excessive side movement of
the armature is detected.
1.
Press out the bushes in the intermediate and
end bracket.
2.
On starter motors not fitted with an end cover,
remove the bush from the commutator end bracket
by inserting a 14 mm.
(9/16 in.) tap squarely into
the bush and withdrawing the bush with the tap;
press in the new bush.
On starter motors fitted with an end cover, press
out the bush from the commutator end bracket and
press in the new bush, using a highly polished
maadre1 0.0127 mm. (0.005 in.) greater in diameter
than the shaft which is to fit into the bush.
Note
The bushes (bearings) are porous bronze
and before fitting should be immersed
for 24 hours in clean engine oil
(S.A.E.
30/40). Porous bronze bushes
must not be reamed out after fitting.
Lubricate the bearing surfaces with
Roc01
'
Molypad' molybdenised non-
creep oil, or a similar equivalent.
Roller clutch drive-To check
If the roller clutch drive is in good condition it
will perform the following functions efficiently:
1.
Provide instantaneous take-up of the drive in
one direction whilst being free to rotate in the
other.
2.
Ensure that the assembly will move freely
along the armature shaft splines without binding
or roughness.
3.
The operating bush will be able to slide
freely along the driving sleeve when the engagement
spring is compressed.
All the moving parts should be smeared with
Shell
Retinax 'A' grease.
Starter motor-To assemble
Reverse the procedure given for dismantling, noting
the following points.
1.
Ensure that the moulded brake shoes are
seated squarely; turn them until the ends of the
crosspeg in the armature shaft engage correctly
with the slots in the shoes.
Chapter
M
FIG. MI5 CHECKING ARMATURE INSULATION
FIG.
MI6 CHECKING FIELD COIL INSULATION
2.
Tishten the
'
through' bolts to 1,11 kg.m.
(8
1b.ft.). Tighten the solenoid retaining nuts to
0,62
kg.m. (4.5 1b.ft.).
Pinion movement-To set
1.
Remove the flexible copper link from between
the yoke terminal and
'
STA' terminal on the
solenoid end and connect terminal
'
STA' to earth.
2.
Connect a 6 Volt supply between the small
unmarked setscrew terminal and earth on the
solenoid.
Note
This will energise both the series and
shunt windings in the solenoid. The
period
of
energising should be as brief
as
passible to prevent overheating of
the series winding.
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