Sunbeam ALPINE I SERIES: APLINE II SERIES, Workshop Manual, Page: 70 / 413

Page 32
Oil pump intake filter-to clean
Whenever the sump is removed the opportunity
should be taken to clean this filter.
Remove spring clip from oil pump shroud and
withdraw gauze. The gauze should be washed in
petrol or paraffin and blown dry with clean com­
pressed air. Do not dry with a fluffy rag.
Provided the recommended lubricating oil Is used,
and the external full flow filter cleaned at the
recommended mileages the oil pump intake filter
does not normally need cleaning.
.
.
.
To remove
Remove distributor cap, and turn engine until
distributor Is pointing to No. I firing position,
and the crankshaft pulley pointer lines up with the
timing cover pointer at T.D.C.
Remove distributor.
Remove sump (oil pan).
Disconnect oil delivery pipe from pump and from
Inside crankcase. Undo two setscrews at oil pump
locating flange and remove pump.
To refit
The ignition distributor takes its drive from the
helical gear on the oil pump shaft axially, through an
offset tongue and slot type coupling which can only
be coupled one way. It is essential that the oil pump
helical gear Is meshed to the corresponding gear on
the camshaft so that the driving slot In the end of
the gear is timed In correct relation to the camshaft.
In view of this, the pump must be refitted as
described below.
Ensure that the engine is at T.D.C. (top dead centre)
with piston of No. I cylinder In firing position.
Replace the oil pump so that the distributor driving
slot In the oil pump gear takes up the position
shown in Fig. 36.
No jointing of any kind Is required between pump
face and cylinder casting.
WSM.124
Section B (Engine)
DIRECTION OF ROTATION
Fl1, 36.
Oil pump drive
correctly ossemb/ed­
No.
I
cylinder
T.D.C.
firing.
Refit sump (oil pan).
Refill with engine oli of specified grade to correct
level.
Refit distributor and check ignition timing.
To dismantle, check clearances and overhaul
Remove the pump Intake gauze filter. Invert the
pump and remove the four hexagon-headed screws
securing the base plate to the pump body.
Lift out the outer rotor ring taking care not to
drop it. IF THIS ITEM IS DROPPED IT CAN
EASILY CRACK.
Remove all traces of oil from the Inside of the pump
body and both rotors. Replace outer rotor.
The following clearances should be checked:-
1. End clearance between the inner and outer
rotor ring and pump body. The maximum and
minimum clearances are ·003" (·076 mm.) and
·001' (·025 mm.) when measured with a feeler
and straight edge as Illustrated In Fig. 37.
2. Side clearance between the top of the lobes on
the Inner and outer rotor as shown In Fig. 38.
The maximum and minimum clearances "A"
are ·006' (1·52 mm.) and ·001" (·025 mm.)
New parts should be fitted If the maximum
clearance Is exceeded.