Lada Niva 4x4, Service Manual

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Spline joint.
Check the gap in the spline joint of the sliding
yoke of the forward and rear shafts. The maximum allowable
backlash on the spline middle diameter is 0.30 mm.
Check for the plug in yoke 5 (fig. 3-48), inspect retainer 7 and
seal 6 of the sliding yoke. If necessary, renew the seal, and the
retainer if damaged.
U-joint. Inspect the bearing housing, needles and thorns of
the spider, seals, end face washers.
If any of the components are damaged, renew the spider in
assembly with the bearings.
The diameter of the yoke opening for the needle bearing
should not exceed 28.021 mm.
In case of damage or if wear of working surfaces of the
layshaft U-joint components exceeds 0.1 mm, renew the U-joint
assembly.
Flexible coupling.
Inspect the rubber components of the
flexible coupling. In case of cracks or peelings of rubber from the
metal inserts, renew the flexible coupling.
Flexible coupling flange.
Inspect the centering bush on the
flexible coupling flange. Renew in case of damage or wear.
Reassembly
The reassembly is a reversal of dismantle, providing the fol-
lowing:
- evenly grease the spline joints with 3-4 gr of îàéã-1 or
îàéã-2ì;
- match the marks on the dismantled parts;
- after reassembling the spline joint, apply axial load to press
the seal by 0.3-0.5 mm and crimp the retainer on the yoke
groove.
The reassembly of the U-joint is carried out in the following
sequence:
- remove old greasing, lubricate the inner surface of the bear-
ing housing with grease ‹ 158 or îàéã-2ì (0.8-1.2 gr on each
bearing). Do not grease the spider thorns, to avoid an air plug
during reassembly. Mount the spider into fork apertures. Insert a
bearing in one of the yoke openings and place circlip1 (fig. 3-52)
with thickness of 1.56 mm in the yoke groove. Insert a bearing in
the other yoke opening until the opposite bearing will thrust
against the circlip end face. The pressing force should not exceed
15000 N (1500 kgf).
82
Fig. 3-49. Layshaft:
1 - gear box output shaft; 2 - output shaft flange; 3 - coupling insert; 4 - flange
fastening bolt; 5 - coupling flange; 6 - boot; 7 - cage; 8 - ball; 9 - CV-joint hous-
ing; 10 - plug; 11 - transfer box input shaft; 12 - circlip; 13 - joint race; 14 - boot
cover; 15 - clamp; 16 - centering bush; 17 - balancing washer
Fig. 3-47. Driveline assembly:
1 - front propeller shaft; 2 - layshaft; 3 - transfer box; 4 - rear propeller shaft
Fig. 3-48. Front propeller shaft, exploded view:
1 - U-joint flange; 2 - grease cup; 3 - circlip; 4 - spider; 5 - sliding yoke; 6 - seal;
7 - seal retainer; 8 - propeller shaft
Fig. 3-50. Dismantling the U-joint:
1 - rest; 2 - bush; 3 - joint fork; 4 - spider