To adjust the bearings you need:
- raise the wheels with a jack so that the tires do not touch the plane of the support
Unscrew the nuts and remove the axle shaft 8, unscrew the locknut 7, remove the lock washer 6, loosening the nut 5 of the bearings by 1/3 - ½ turn, check the ease of rotation of the wheel.
In case of wheel braking, eliminate the cause of its tight rotation (grazing of the drum and brake shoes) and only then carry out the adjustment;
- tighten the nut 5 for fastening the bearings with a special wrench with a knob (600 mm) to a torque of 70 to 100 Nm (7-10 kgcm).
When tightening the nut, it is necessary to turn the wheels to evenly place the rollers in the bearings;
- unscrew the nut 5 at an angle of 22—45° (by 1—2 slots, no more, on the lock washer 6).
Install the lock washer and make sure that the lock pin fits into the slot in the washer;
- tighten locknut 7 to 150—200 Nm (15—20 kgcm);
- check adjustment.
When properly adjusted, the wheel should rotate freely, there should be no axial play;
- insert axle shaft 8, put spring washers and tighten the nuts of the axle shaft fastening studs.
- check the adjustment of the bearings according to the degree of heating of the wheel hub during the control run of 8-10 km.
Strong heating of the hub (over 70 ° C, the hand does not tolerate) is unacceptable and must be eliminated by re-adjustment.
The bearings of the rear wheel hubs are lubricated with oil coming from the rear axle housing through the axle housings.
Therefore, after adjusting the bearings, check the oil level in the rear axle housing and add oil if necessary.
To fill the cavity of the hubs with grease, raise the right and left wheels alternately to a height of at least 300 mm and hold for at least 6 minutes, at an oil and ambient air temperature of at least 15 ° C.