Page 730 - Workshop Manual - Aumark (BJ1051)

25-20
Rear axle- Differential assembly

Inspection

1. Inspect the driven gear jumpiness
(a). Measure the jumpiness from the back of the
driven gear with a dial indicator.
Limit value: 0.07 mm
If the jumpiness of the driven gear is beyond the
limit value, replace with a new driven gear.

2. Inspect the meshing marks of driving gear
and driven gear
(a). Check the meshing marks of the driven gear by
red lead powder.
(b). Correct meshing marks of the driven gear
Position: At the higher part of the tooth
surface of the driven gear and slightly deflect
to the small end.
Length: ≥ 60% of the tooth surface
Width: ≥ 50% of the tooth surface
If the meshing marks of the driving gear and the
driven gear are not correct, adjust them by changing

25 the number of the washers through the increase or
decrease of the driving gear bearing seat and
adjusting the nuts through the rotation of the
differential bearing. (Refer to “chapter 25 rear
axle-differential assembly, overhaul”, and “chapter
25 rear axle- driving gear assembly, overhaul”)
Notice:
Ensure that the ring number of the adjusting nuts
screwed in on the differential side is the same with
that screwed out to maintain the same pre-stressing
force of the differential bearing, and then fasten the
locking plates.

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