73
Fig. 9.15. Rear Propeller Shaft:
1 — lubrication nipple for spline coupling; 2 — lubrication nipple for joint needle bearings
Driving Axles
Drain oil through orifice 2 (Fig. 9.16, 9.17) at the bottom of the
housing by unscrewing inspection hole plug 1.
Axial clearance of more than 0.05 mm in the bearings of the axle drive
pinion is not allowed, as greater clearance will lead to premature pinions
teeth wear and the axle jam. Check the axial clearance in the bearings by
swinging the drive pinion by the universal-joint flange.
The axial clearance in the differential bearings is also not allowed.
Check it via oil-filling holes (axles in Fig. 9.16) or by swinging the driven
wheel with the housing cap opened (axles in Fig. 9.17).
If clearances are detected, the axle shall be adjusted. The axle
adjustment is a labour-intensive operation requiring specific skills and
instruments, that is why it is recommended to adjust it only at a service
station.
Front axles and reduction gear are switched using the transfer case lever.
While inspecting the steering knuckles, check adjusting bolts 1 (Fig.
9.18) and steering stop bolts 3. The value of steering angle B of the right
wheel to the right and of the left wheel to the left shall be within the limits
of 26-27°. The excessive steering angle results in contacts between the
wheel and the suspension parts.
It is not required to add the grease into the spherical pins and into the
axle ball struts. The grease in the units is changed during maintenance.
Steering knuckle pins tightening
is adjusted at the factory under
pre-load along the common axle shaft of the pins.
During vehicle operation pay special attention to the tightening of the
steering knuckle pins. When the interacting spherical surfaces of liners
3 (Fig. 9.19) or pins 2 wear out, the pre-load disappears, and the air gap
appears along the common axle shaft of the pins. Tighten clamping bush
10 to eliminate the air gap.
