Rolls-Royce Silver Shadow
8
Bentley
T
Series
Workshop
Manual
Chapter
N
9.
Lift off the reservoir body
taking care not to
misplace the rubber sealing rings and distance plate
located beneath the body.
10. Withdraw the split sleeve from the inlet port of
the pump, but do not attempt to withdraw the venturi
beneath it. If this is loose, the rotor and cam ring will
probably
be
damaged and will cause noisy pump
operation. The venturi is an interference fit between
its largest diameter and its bore. If it is loose, swell
the interference diameter by pressing a large
ball-
bearing into the end of the venturi. Examine the
rotor, rollers and cam ring for pitting and wear and
renew them if necessary. Also,
if
the pump makes a
chattering noise, audible from outside the car, the
rotor, rollers and cam ring should
be
renewed.
11. If necessary, remove the pump pulley; take care
to retain the Woodruff key.
12. Using an Allen key unscrew the six
socket-
headed screws which secure the two halves of the pump
body together.
13. Separate the pump from the cover and collect
the sealing ring.
14.
Before removing the rotor, rollers and cam ring
take
note
of the direction in which the rotor is fitted.
Using a straight edge across the body of the pump,
check, with a feeler gauge, the end clearance of the
rotor and rollers. This should
be
within the range
0.001 in. to 0.0018 in. (0,025 mm. to 0,046 mm.).
15. Remove the rotor, rollers and cam ring from the
pump body, taking care not to misplace the rotor
driving key from the shaft.
16. Unscrew the four countersunk-headed screws
and remove the bearing retaining plate.
17.
Remove the shaft from the housing, then gently
tap the oil seal of the housing.
18. Inspect the bearing for wear or damage; if ex-
cessively worn the bearing should be removed from
the shaft and a new one fitted.
19.
Remove the flow control valve plug from the side
of the pump body and withdraw the combined flow
control and relief valve, taking care to retain the flow
control valve spring.
20.
Inspect the pump body and cover for wear or
scoring by the rotor; if excessive wear or scoring has
taken place and the end clearance of the rotor in the
body exceeds
0.0018 in. (0,046 mm.), the body and
cover should be renewed and a matched set of rotor,
rollers and cam ring fitted.
Steering
pump-To
assemble
1.
Thoroughly clean all parts in paraffin and dry
them using a
high
pressure air line.
2.
After greasing the lip of the new seal, insert it
into the pump body. Care should
be
taken not to
damage the seal.
3.
Insert the drive-shaft, at the same time turning
it so as to
minimise the risk of damage to the oil seal.
Tap the bearing into the body, then fit the bearing
retaining plate and the four countersunk-headed
screws.
4.
Fit the cam ring, ensuring that it is located
correctly on the pin
in
the pump body.
5.
Fit the key and slide the rotor on to the shaft.
The rotor should
be
fitted so that when viewed from
the rear of the pump, the angled face of the rotor
blades should face
anticlockwise.
6. Insert the six rollers into the spaces between the
rotor blades.
Fit new rubber sealing rings in the
annular groove formed on the end of the cam ring
and in the recess formed in the flow control by-pass
port.
7.
Fit the six Allen setscrews and secure the cover
to the pump body. Whilst tightening the setscrews
rotate the shaft to ensure that no binding takes place.
8.
Fit the flow control valve spring and the com-
bined flow control and relief valve into the pump
body, ensuring that it moves freely in its bore.
9. Fit the flow control valve cap using a new
'0'
ring.
10. Fit the reservoir to the pump body ensuring that
new sealing rings are fitted to each side of the distance
plate. Fit the sleeve into the inlet port of the pump,
then using the
Q
in. U.N.F. blanking plug and the
fb
in.
U.N.F. setscrews and
'0'
ring secure the reser-
voir
firmly to the pump body.
11. Fit the filter support plate and the centre pedestal,
then tighten the pedestal (see method given for
removal).
12. Fit the filter, filter retaining washer, spring and
reservoir cap ensuring that the reservoir cap seal and
the securing screw seal are in good condition.
Steering
pump-To
fit
To fit the steering pump to the engine, reverse the
procedure given for its removal. noting the following
points.
1.
After fitting, check the belt tension and fill and
prime the system as described later.
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