Repair Manual

REAR BEARING ELEMENTS
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CAST IRON REAR DRIVE AXLE DIFFERENTIAL
NOTE: Check the marks on the axes in correspondence with the casing.
Mark the adjustment nuts in correspondence with the casing.
When remounting the main transmission, observe the following technical conditions:
1. The pinion and rim are lapped together.
They are inseparable.
Replacing one part obligatory implies replacing of the other one.
There is a common symbol marked both on the rim and on the pinion..
2. The two caps bearings shall be in correspondence with differential casing.
DIFFERENTIAL ADJUSTMENT
It is performed before and upon remounting and assumes the performance of the three types
of adjustment :
1. Check and correction of the conical distance
2. Adjustment of the differential drive pinion
3. Adjustment of the rim gearing clearance
1. ADJUSTMENT OF THE CONICAL DISTANCE
It consists in the measurement and correction of the distance between the front face of the
differential drive pinion and the rim symmetry axis ( its value is A = 54 mm)
The following devices shall be used:
- the chuck M, together with the comparator dial CC;
- the 18 mm spacer C.
The outer rings of the differential drive pinion bearings are mounted in the differential casing.
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