Lada Niva 4x4, Service Manual

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After press-fitting, ensure, that the ring does not shift under
the axial load of 19.6 kN (2000 kgf). To do this, place the axle
shaft assembly on a special fixture (fig. 3-63), and grip the stop
ring in special vice.
Attach the leg of indicator 1 with scale interval of 0.01 mm to
the axle shaft flange. Set the arrow to "0" and apply the specified
axial load, creating with a dynamometer the torque of 78.5-83.3
N•m (8-8.5 kgf•m) on the tool screw. The screw through the ball
should be pressed against the axle shaft end face. There should
be no, even a slightest, gap between the stop ring and the inner
ring of the bearing.
After removing load and when undoing the tool screw, the
indicator arrow should return to zero, thus proving there was no
shift between the stop ring and the axle shaft. If the indicator
arrow does not return to zero, it will mean the stop ring had shift-
ed and the axle shaft assembly should be renewed.
After checking the press fitting of the stop ring, replace the
fastening bolts of the plate and oil screen 6 (see fig. 3-62) and fix
them in place by bending back the bolt retainers.
On-vehicle measurement of the axle shaft axial play
Slacken the rear wheels fastening nuts. Put blocks under
front wheels and raise the rear axle. Release the handbrake and
place the gear shift lever in neutral.
Remove wheels and brake drums. Attach tool 02.7834.9504
(fig. 3-64) to the axle shaft, pass through one of the axle shaft
openings the indicator 1 leg extension until it will rest against the
braking plate or the oil screen and fix the indicator.
Make the measurement with the indicator, applying to the
axle shaft flange force of approx. 49 N (5 kgf) in both directions
along the rear axle shaft. The free play should not exceed 0.7
mm.
Reduction gear
The rear axle reduction gear assembly is shown on fig. 3-65.
It is unified with the reduction gear of VAZ - 2106 and has a label
on the housing as figure 6.
Fault diagnosis by noise
Fault diagnosis is carried out in the following sequence.
Test 1. In order to clearly determine the character of noise,
drive the vehicle on a highway with speed approximately 20
km/h. Then gradually increase speed up to 90 km/h, listen care-
fully to various noises and note speed, at which they occur and
disappear.
Release the throttle pedal and without applying the brake
pedal shift to lower gear.
During deceleration listen how noises change, and note the
moment, when noise increases. Usually, noises appear and dis-
appears at same speeds both at acceleration and deceleration.
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Fig. 3-62. Press-fitting the axle shaft bearing stop ring:
1 - tool; 2 - axle shaft; 3 - race; 4 - stop ring; 5 - bearing; 6 - oil deflector assem-
bly and bearing securing plate; 7 - ring
Fig. 3-63. Checking the force of pressing out the axle shaft bearing stop
ring:
1 - indicator; 2 - axle shaft; 3 - fixture; 4 - dynamometer; 5 - bearing; 6 - bear-
ing stop ring
Fig. 3-64. Checking the axle shaft axial play with the wheel and the
brake drum removed:
1 - indicator; 2 - fixture