149
Fig. 9.16. Adjustment of the
wheels steering angle:
1 — steering stop bolt; 2 — lock-nut;
3 — steering stop.
and of the left wheel to the left should be within the limits of
31–32°. The increased steering angle of the wheels results in the
contact of the wheel with the suspension parts.
It is not required to add grease into the spherical pins and into
the ball struts during operation. The grease in the units is replaced
during maintenance.
Adjustment of steering knuckle pins 2 (Fig. 9.17) tightening at
works is carried out at pre-load along the common axle shaft of the pins.
During operation of the vehicle, pay special attention to the
condition of the tightening of the steering knuckle pins. At the
wear of the interacting spherical surfaces of liners 3 or pins 2 the
pre-load disappears and the air gap appears along the common axle
shaft of the pins.To remove the air gap tighten clamping bush 10.
Operating the front driving axle with gaps in the pins units can
lead to a premature failure of the liner of the upper pin.
It is easier to tighten clamping bush 10 of the lower pin while
in operation:
– unscrew nut 13;
– remove shield 12 with spacer 11;
– using the special wrench tighten clamping bush 10 to remove
the air gap (hit the threaded end of the pin with a copper hammer
beforehand);
– by turning the wrench by 10–20°, tighten this bushing to obtain
a preliminary tension along the common axle shaft of the pins;
– install bracket with a spacer;
– tighten nut (see Annex 2). Warning! Tightening torque excess
will cause lower pre-load and pin unit failure.
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