The main gear is hypoid. Drive gear 29 (pic. 128) and driven 19 are paired in terms of noise and contact, so they are supplied as spare parts and replaced as a pair. Between the inner rings of the bearings 23 of the drive gear there is a spacer sleeve 22, which, deforming when the drive gear nut is tightened to a certain moment, provides a preload in the bearings 23. An adjusting ring 21 is installed between the end face of the drive gear and the inner bearing, which determines the correct position of the drive gear relative to the driven one.
Pic. 128. Rear axle:
1 - axle shaft; 2 - wheel bolt; 3 - guide pin; 4 - oil deflector; 5 - brake drum; 6 - half shaft bearing; 7 - locking ring: 8 - rear axle beam flange; 9 - axle shaft seal; 10 - rear axle beam; 11 - bearing mounting plate; 12 - rear brake shield; 13 - axle guide; 14 - adjusting nut; 15 - differential box bearing; 16 - bearing cover; 17 - breather; 18 - satellite; 19 - driven gear; 20 - axle gear; 21 - adjusting ring of the drive gear; 22 - spacer sleeve; 23 - drive gear bearings; 24 - oil seal of the drive gear; 25 - dust deflector; 26 - flange; 27 - oil deflector; 28 - rear axle gear case; 29 - drive gear; 30 - axis of the satellites; 31 - support washer; 32 - differential box; 33 - a bolt of fastening of a cover of the differential bearing; 34 - lock plate.
The driven gear of the main gear is attached to the flange of the differential box 32 and rotates with it on two bearings 15. The preload in these bearings, as well as the gap between the teeth of the drive and driven gears, is regulated by nuts 14, wrapped in split bearing beds. Side gears 20 are installed in the cylindrical sockets of the differential box and rest on the box through the support washers 31. By selecting the washers in thickness, a gap of 0.0-0.1 mm is set between the teeth of the satellites and side gears.
Axle shaft 1 with its inner end enters the splined hole of the side gear, and its outer end rests on a ball bearing 6, which is fixed on the axle shaft with a locking ring 7. The half shaft bearing is sealed in the bridge beam socket from the inside with a self-clamping gland 9, with a rubber ring on the outside. The bearing is fixed in the seat of the beam by plate 11, which, together with the oil deflector and the brake shield, is fastened with four bolts to the beam flange.