In the article, we will consider possible malfunctions of the rear axle of the UAZ-3151 car
- Cause of malfunction
Remedy
Increased noise:
- - Increased side clearance in the main gear engagement
- - The teeth of the final drive gears are worn out
Replace worn gears; it is not necessary to compensate for wear by adjusting the position of the gears in order to avoid jamming of the main gear
- the bearings of the final drive gear are worn out:
adjust or replace worn bearings;
- differential bearings are worn out;
replace worn bearings;
- the fastening of the driven gear to the differential is loosened;
tighten the driven gear bolts;
- Loosening the final drive gear bearings
Tighten the nut as far as it will go
- Incorrect adjustment of the main gear engagement on the contact
Adjust the engagement according to the contact patch (if there is no wear on the teeth)*
- Reduced oil level in the axle housing
Add oil to the crankcase up to the lower edge of the oil filler hole
Increased noise (when turning or slipping a car):
- Malfunctions in the parts of the differential (wear of the gear teeth of the rubbing surfaces of the satellite box and the surfaces of other parts mating with them)
Replace worn parts
Violent knocking (when carburetor throttle pedal depressed after coasting):
- Increased lateral clearance in the main gear engagement due to tooth wear
Replace gears as a set
- Wear of differential parts
Replace worn parts
- Wear of axle splines
Replace axle shafts
Oil leaking through the pinion collar:
- Wear of the cuff or surface (under the cuff) of the flange of the cardan shaft to the drive gear
Replace the collar or flange
- Increased oil level in the axle housing
Check and correct oil level
- Safety valve dirty
Clean the valve (breather)
Oil leak in the plane of the axle housing connector:
- Loose fastening of the cover and crankcase or damage to the gasket
Tighten nuts or replace gasket (0.12 mm gasket thickness; release paper material)
Oil leak in the plane of the crankcase connector and the drive gear front bearing cover:
- Loose lid fastening or damaged seals
Tighten the bolts or replace the gaskets (the thickness of the gasket pack should be 1.3 times greater than the gap between the ends of the cover and the crankcase; the material of the gaskets is cardboard)
