Sunbeam ALPINE I SERIES: APLINE II SERIES, Workshop Manual

Page: 213 / 413

WSM.12.C
Section G (Rear Axle)
6th
re-issue
Page9
HYPOID BEVEL DRIVE
Flt the outer bearing.
Flt the coupling driver, washer and dummy nut.
Progressively tighten the dummy nut to absorb all
end float and until a slight resistance Is felt to turn
the pinion flange by hand.
Flt the dummy bearings Into the differential.
Flt the centre jig through them.
Replace the two bearing caps and tighten the four
securing nuts.
It will be observed that there Is a gap between the
end of the dummy pinion shaft and centre jig.
Measure this gap using feeler gauges.
Note this measurement and at the same time note
any measurement engraved on the head of the
actual pinion.
This figure records, In thousandths of an Inch, any
variation In position of the tooth form relative to
the inner bearing shoulder which may have
occurred during manufacture.
It may be preceded by either a minus sign or a plus
sign.
If It is preceded by a minus sign add this amount
to the measurement taken of the gap.
If the sign Is a plus subtract the amount from the
measurement of the gap.
The resultlng measurement, would be the thickness
of shims to be added to the actual pinion at points
A and B, to position the pinion relative to the crown
wheel axis. In practice, however, It is found that,
as the bearing Is pressed to the actual pinion, the
bearing alters length approximately ·002 In.
( ·OS mm.). Therefore, ·002 In. (
.os
mm.) should
be subtracted from the thickness of shims at point
B.
Remove the dummy pinion from the casing.
Place the shims B onto the actual pinion and press
on the Inner bearing race (lightly olled). Use an
arbor press and a tubular drift or the hand press
RG.4221B and adaptor RG.4221B-21.
On later pinions fit the shim abutment washer,
the bevelled edge against the pinion outer shoulder.
On these pinions the distance from behind the
pinion head to the abutment shoulder has been
reduced from 2·828 In. (71·83 mm) to ·2·716 In.
(68·98 mm).
Place onto point A on the actual pinion the same
thickness of shims as at point B plus ·018 In.
(·46 mm.).
Insert the pinion Into the casing and fit the outer
bearing (lightly oiled). Do not fit the oil seal at
this stage.
Replace the coupling, washer and nut.
To obtain pre-load
The bearings are pre-loaded when a resistance Is felt
when turning the pinion flange by hand with the nut
tightened to a torque as given In General Data.