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limiters 3. The value of angle В of turning the right wheel rightwards and the left wheel leftwards shall be within 26
-
27 °.
Increased wheel steering angle leads to wheel contact with suspension parts.
During operation, the addition of lubrication to the spherical pins and ball units is not required. During the repair the
grease is replaced.
The pin tightening is
adjusted at the factory with a preloading along the common axis of the pins.
When operating the vehicle, pay special attention to the knuckle pins to check that they are tightened. When the
rubbing spherical surfaces of the bushings 3 (Fig. 9.19) or pins 2 are worn out, the pre-load will disappear and there will
be a gap along the common axis of the pins. Eliminate this gap by tightening the clamping sleeve 10.
Operation of the front drive axle with gaps in the pin joints leads to early failure of the upper pin bushing.
Under operating conditions, it is most convenient to tighten the clamping bush of the lower pin:
-
unscrew nut 13;
- remove lining 12 with gasket 11;
-
tighten the clamping sleeve 10 with a special wrench to remedy the gap (first hit with a copper hammer on the
threaded end of the pin);
-
Turn the wrench 10-
20° to retighten this bushing to create a preload pressure along the common axis of pins;
-
insert lining 12 with gasket 11;
-
tighten nut 13 by applying a torque of 80-
100 N∙m (8
-
10 kgf∙m).
Version 1
Version 2
Fig. 9.18 Adjusting of the turning angle of the wheels:
1 - rotation restraint bolt; 2 - lock nut; 3 - rotation restraint support
CAUTION: If the tightening torque is too high, it will result in reduced preload and malfunction of the pin
assembly.
The torque of the ball bearing 8 (or body 1 of the swivel axle assembly, if the ball bearings are not detached from the
casing of the half axle) with the removed sealing rings 5, 6 and the swivel axle joint 7 in any direction relative to the
common axis of pins should be within 10-25 Nm (1.0-2.5 kgf-m).
Fig. 9.19 The steering knuckle and the hub:
1 - knuckle body; 2 - pin; 3 - pin insert; 4 - spring;
