1523.6-0000010 OM
192
6.4 Possible failures in rear axle and instructions for their troubleshooting
The list of possible failures in rear axle and instructions for their troubleshooting are shown
in table 6.4.1.
Table 6.4.1
Failure, external manifestation,
cause
Troubleshooting
Increased noise of the main gear
Improper adjustment of gear en-
gagement of main gear according
to tooth-contact and side clearance
- adjust gear engagement of main gear according
to tooth-contact;
- adjust side clearance in the engagement of main
pair (0.25...0.55 mm).
Improper adjustment of conic bear-
ings of the main gear
Adjust bearing preload
Not enough oil in transmission
Check oil level in the transmission casing and refill
oil to the oil level mark if necessary
Gear teeth damage
Check the condition of the gear tooth ring. Chip-
ping and damage are not allowed. Gears with
damaged teeth shall be replaced in pairs
Differential lock fails to operate
Friction facings of lockup clutch
disks are worn-out
Replace the disks
Lockup clutch diaphragm is dam-
aged
Replace the diaphragm
Low pressure of oil running to the
actuating mechanism of lockup
device
Check oil pressure running to DL clutch. It shall be
within 0,9 to 1,0 MPa while oil viscosity shall be
within 18 to 26 mm
2
/s
Electrical hydraulic distribution
valve for lockout control fails to
operate
Check differential lock ECS operability, ease of
spool movement, correct the trouble
There is no pressure in the hydraulic system
Transmission hydraulic system
pump drive is off
Start the transmission hydraulic system pump drive