Fig. 18 - Shimming the bevel pinion bearings.
Fig. 19 - Measuring the backlash between
bevel pinion and ring gear teeth.
Fig. 20 - Adjusting the bevel gears.
Adjusting bevel gears
1 - Assemble the differential housing, inserting a number of shims
between the bearing flanges and the carrier such as will give a
preload of 0.04 mm at the bearings.
2 - Remove the differential housing again and fit the pinion,
inserting a first pack of shims A to a thickness of 0.50 mm and a
further pack B of thickness such that when the lock nut is torqued
to 206
÷
226 Nm (21
÷
23 kgm), the bearings are able to turn freely
in their seats while discernibly subject to a slight preload (no more
than 0.04 mm):
3 - Adjust the distance E between the differential housing and the
end of the pinion by adding or removing shims at pack A.
The exact measurement for this adjustment is obtained by adding
or subtracting the value stamped on one tooth of the pinion to or
from a value of 1 mm.
Warning: having adjusted the distance between the differential
housing and the end of the pinion, the preload adjustment must
be repeated to re-establish the thickness of the pack of shims B.
4 - Refit the differential housing and measure the backlash be-
tween the crownwheel and pinion teeth with a comparator: the gap
must be between 0.15 and 0.20 mm; if not, the crownwheel can
be brought closer to the pinion by removing shims from C and
adding to D, or distanced by removing from D and adding to C.
drive axles - axles
4-W.D. front axle
43
4
204
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