Lada Niva 4x4, Service Manual

Page: 28 / 81

Using two feeler gauges 2, with 4 and 3 blades of different
thickness accordingly, determine which will tightly fit in the clear-
ance H between the base of the bearing and the yoke groove end
face, and install a circlip of the same thickness.
Note. One feeler gauge has blades with thickness of 1.45;
1.48; 1.52; 1.56 mm, the other one - 1.60; 1.64; 1.67 mm.
If the blade of the smallest thickness (1.45 mm) does not fit
into gap ç , replace circlip 1 with the one having thickness of 1.4
mm and repeat the procedure.
If the blade of the greatest thickness (1.67 mm) loosely fits
into backlash H, it is necessary to remove ring 1 and insert in this
gap a ring with thickness of 1.67 mm, and repeat all specified
operations.
Note. It is recommended to carry out the gap measurement
from the side of the pipe. The circlips are provided in eight size
sets (according to their thickness), each of them has a certain
colour: 1.45 - not painted; 1.48 - yellow; 1.52 - brown; 1.56 - dark
blue; 1.60 - black; 1.64; 1.67; 1.40 - colors are not designated and
their thickness is determined by measuring.
After inserting the circlips, hit the yoke forks with a hammer
with plastic head. After the impact the backlash between the
bearing bottom and the circlip will be taken up, and formed
between the bearing housing and spider thorn end faces within
0.01-0.04 mm. After reassembly, check for easy rotation of the U-
joint yokes and the shaft balance.
To reassemble the layshaft U-joint follow the procedure
described in chapter "Front wheel drive". When reassembling,
install retainer 7 (see fig. 3-49) with the chamfer facing the trans-
fer box input shaft, and grease the U-joint with 20 cm
3
of
Longtern-00 from "Dow corning".
Shaft balance
The front and rear propeller shafts are balanced on special
machines by welding metal plates.
At speed of 5500 min
- 1
the shaft misalignment, checked on
surfaces A and B (fig. 3-53), should not exceed 1.72 N•mm (175
grf•mm), and at the balance check - 2.16 N•mm (220 grf•mm).
The layshaft balance is checked at speed of 800 min
- 1
on
surfaces E and F . Equilibration is provided by balance washers 1
(see fig. 3-53) and drilling the U-joint housing. The out-of-balance
condition should not exceed 1.96 N•mm (200 grf•mm).
ATTENTION. If any of the shaft components were
replaced during repair, it is necessary to balance the shafts.
After balancing, lubricate the U-joint bearings with grease
N158 or îàéã-2ì through oilers. Force in the grease until it will
start coming out through the sealings.
83
Fig. 3-52. U-joint reassembling:
1 - circlip; 2 - feeler gauge; H - gap; A, B, C, D, E, F, G - feeler gauge blades
with thickness in mm: 1.45; 1.48; 1.52; 1.56; 1.60; 1.64; 1.67
Fig. 3-51. Installing the bush for dismantling the U-joint:
1 - bush
Fig. 3-53. Balancing the propeller shafts:
1 - washers for balancing; A, B, E, F - out-of-balance check points; C, D - shaft rest points on the balancing fixture