60
Fig. 9.24 Spare wheel mounting (UAZ-390995 "Expedition" version):
1 - spare wheel; 2 - wheel mounting nut; 3 - bracket of rear power bumper
Wheel hubs
To replace the grease, remove the hub from the center pin, remove the used grease, rinse the bearings and collar
thoroughly. Lubricate the bearings and the lip of the collar. Be sure to fill the space between the bearing rollers with
grease. Between the bearings lay a layer of grease with a thickness of 10-15 mm. Do not lay the lubrication in the hub
more than normal in order to avoid falling it into the wheel brake mechanisms.
Check for gaps in the bearings by rocking the wheels.
Adjust bearings carefully. Weak tightening of bearings results in shocks and destroying bearings while moving. Too
strong tightening of bearings results in an excessive heating causing leakage of grease and destroying of bearings. In
addition, large gaps in the hubs of the front wheels increase the stroke of the brake pedal.
Adjust the wheel hubs bearings as follows:
1.
Elevate the vehicle or jack it up from the side of the wheel, the bearings of which must be adjusted.
2.
Remove the axle shaft 9 (Fig. 9.25) of the rear axle or the hub flange of the front axle.
3.
Unbend the nib of the lock washer 6, unscrew the lock nut 7 and remove the lock washer.
4.
Loosen the nut 4 bearing adjustments 1 / 6-1 / 3 turns (1-2 faces).
5.
When turning the wheel by hand, check the ease of its rotation (the wheel shall rotate freely without
interfering with the disc or drum by the brake pads).
6.
Tighten the nut for adjusting the hub bearings with a hand-held tool smoothly, without jerking, with a torque
25 - 30 N m (2.5 - 3.0 kgf m).
When tightening the nut, turn through the wheel to properly position the rollers in the bearing.
7.
Install the lock washer, screw on and tighten the locknut with a tightening torque of 20 - 25 N m (2.0 - 2.5 kgf
m).
When replacing the bearings, the tightening torque of the nut is 35 - 40 N m (3.5 - 4.0 kgf m), lock nuts 25 - 30 N m
(2.5 - 3.0 kgf m).
Install the lock washer with an internal mustache in the groove of the center pin. If there are at least minor cracks in
the lock washer, replace the washer.
8.
Check the bearing adjustment after tightening the lock nut. With proper adjustment, the wheel shall rotate
freely without jamming, noticeable axial clearance and pitching.
9.
Bend one nib of the lock washer on the face of the nut, and the second - on the face of the locknut until it fits
to the facets. Unbend the nibs of the lock washer closest to the middle of the nut facets.
