After moving the driven gear, check the side gap by indicator
2 (see fig. 3-78). Repeat the adjustment if the clearance does not
correspond to the rated value.
Remove tool A.95688/R, fit the adjusting nut lock plates and
fix them by bolts with spring washers. In spare parts the lock
plates are delivered of two types: with one or two tabs depending
on the location of the nut slot.
Adjustment and repair of reduction gear components is car-
ried out on a bench, on which it is possible also to test the reduc-
tion gear for noise and to check the arrangement and the form of
the pattern on teeth working surfaces, as set forth below.
Final drive gear teeth mesh pattern check
To finally check the quality of final drive gear mesh on the test
bench:
- after adjustment place the reduction gear on the bench and
grease the working surfaces of the driven gear teeth with a thin
layer of lead oxide;
- start the bench and decelerate the rotation of the axle
shafts, so that under load on the driven gear teeth surfaces there
were visible traces of contact with the driving gear teeth;
- change the rotation direction and while decelerating ensure
forming the contact patterns on the other side of the driven gear
teeth, what will simulate the reverse movement of the vehicle.
The gear mesh is considered to be OK, if on both sides of the
94
Fig. 3-78. Checking the side gap in final drive gear mesh using tool
A.95688/R:
1 - bracket securing screw; 2 - indicator for checking the gear mesh side gap;
3 - indicator rod securing screw; 4 - indicator bracket; 5 - retaining screw;
6 -driven gear
Fig. 3-79. Checking the differential housing bearing preload:
D - distance between two covers of the differential bearings; 1, 2 - shims
Fig. 3-77. Checking the differential housing bearing preload using fixture
A.95688/R:
1 - fixture screw; 2 - key A.55085; 3 - driven gear; 4 - adjusting nut; 5 - inter-
mediate lever; 6 - securing screw; 7 - indicator bracket; 8 - bracket securing
screw; 9 - indicator for checking the bearing preload
Summary of Contents for Niva 4x4
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