Adjust bearings carefully.
If the bearings are loosely tightened, shocks occur in them during movement, destroying the bearings.
Tightening too tightly causes the bearings to become very hot, causing grease to leak out and the bearings to fail.
Adjust the bearings in the following order:
1. Jack up the wheel whose bearings need to be adjusted.
2. Remove the rear axle shaft (or the drive flange of the hub with the front axle wheel disconnect clutch). To do this, tighten the two puller bolts.
3. Bend the tab of the lock washer, unscrew the lock nut, remove the lock washer.
Fig. 1. Wheel bearing adjustment
4. Loosen the bearing adjustment nut 1/6-1/3 turn (1-2 edges).
5. Turning the wheel by hand, check the ease of its rotation.
In the event of hard rotation, eliminate the cause of braking (for example, grabbing the drum on the brake pads, sticking cuffs, etc.).
6. Tighten the hub bearing adjustment nut using a wrench (Fig. 1) and a 300-350 mm long wrench with one hand until the wheel turns tightly.
When tightening the nut, press the wrench knob smoothly, without jerking, and turn the wheel to correctly position the rollers on the raceways of the bearing rings.
Fig. 2. Wheel bearing adjustment
7. Loosen the nut 1/4–1/3 turn (1.5–2 edges), install the lock washer.
Tighten the locknut and lock both nuts by bending the tabs of the washer over the edge of the nut and locknut (fig. 2).
8. Check the bearing adjustment after tightening the locknut.
When properly adjusted, the wheel should rotate freely, without jamming, noticeable axial play and rolling.
9. Reinstall the rear axle shaft (or drive flange and front axle disconnection clutch), install the bolts with spring washers and tighten.
Tightening torque 60–70 Nm (6–7 kgfm).
Check the correct adjustment of the bearings by heating the wheel hub when driving.
If the hub gets very hot, unscrew the nut 1/6 turn (1 face), following the sequence and rules outlined above.
When checking the adjustment of bearings by heating the hubs, do not use service brakes, as in this case the hubs heat up from the brake drums.