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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.
Table 6.4
Failure,
external
cause
Improper adjustment of gear en-
gagement of main gear according
to tooth-contact and side clearance
Improper adjustment of conic bear-
ings of the main gear
Not enough oil in transmission
Gear teeth damage
Friction facings of lockup clutch
disks are worn-out
Lockup clutch diaphragm is dam-
aged
Low pressure of oil running to the
actuating mechanism of lockup
device
Electrical
hydraulic
valve for lockout control fails to
operate
Transmission
hydraulic
pump drive is off
manifestation,
Increased noise of the main gear
- adjust gear engagement of main gear according
to tooth-contact;
- adjust side clearance in the engagement of main
pair (0.25...0.55 mm).
Adjust bearing preload
Check oil level in the transmission casing and refill
oil to the oil level mark if necessary
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
Replace the disks
Replace the diaphragm
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
distribution
Check differential lock ECS operability, ease of
spool movement, correct the trouble
There is no pressure in the hydraulic system
system
Start the transmission hydraulic system pump drive
Troubleshooting
2
/s
180
1523.5-0000010 OM
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Troubleshooting
