Sy/E34 - Rolls-Royce Bentley T Series Service Bulletin

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SY/E34
DESCRn>TI'ON:
When replacing a three vane pump with a two vane pump the
following procedure should be followed.
Remove the existing air pump.
Also remove,hose - air pump to 4-way connection mounting
bracket, bridge and adjusting strut to air pump. Pump intake
silencer, hoses and brackets. Bobbin - induction manifold to
coolant pump. Elbow - bypass coolant pump.
Retain bolts and washers - all other parts to be discarded.
Remove fan and alternator drive belt as described in Workshop
Manual Chapter Lin order to remove the air pump drive belt.
Discard the air pump drive belt.
All new parts required to carry out the change frorn a three vane
to
a
two vane air pump, except the drive belt (Part No VE 36363},
are supplied in Kit No RH 2565. No intake silencer is needed
with the new pump.
Assemble using new parts as follor,,..rs:
Fit the bobbin and elbow into the manifold and coolant pump.
Fit the mounting bracket, mounting bridge and adjusting strut
loosely onto the engine.
Fit the pulley onto the air pump using
the
2 set screws supplied.
Fit the air pump onto the mounting units (using 2 washers and
bolt supplied for the adjusting strut).
Fit the new drive belt, tighten the mounting units and tension
belt as described in Chapter L of the Workshop Manual.
Fit the hose from the air pump to the 4-way connector.
Refit the alternator drive belt and fan and adjust the belt to
the correct tension as described in Chapter L of the Workshop
Manual.