
2022.3-0000010 OM
306
7.5 Possible failures in rear axle and guidelines for troubleshooting
List of possible failures in rear axle and guidelines for troubleshooting are shown in
Table 7.5.
Table 7.5
Failure, external manifestations,
cause
Troubleshooting
Increased noise of the main gear
Improper adjustment of gears en-
gagement of main gear according
to through tooth-contact pattern
and side clearance
- adjust of gears engagement of main gear accord-
ing to through tooth-contact pattern;
- adjust side clearance in engagement of main pair
(0.25...0.55 mm).
Improper adjustment of conical
bearings of main gear
Adjust bearing preload
Not enough oil in transmission
Refill oil up to oil level mark
Gear teeth damage
Check the condition of gear tooth ring. There shall
not be any chippage and damage. Gears with
damaged teeth shall be replaced in pairs
Differential lock does not work
Low pressure of oil running in work
space of hydraulic cylinder piston
of lock-up clutch
Check oil pressure. In case it is below 900 kPa,
find and correct the trouble in transmission hydrau-
lic system operation
Electrical hydraulic distribution
valve for lockout control doesn’t
operate
Check differential lock ECS, ease of spool move-
ment, correct the trouble
7.6 Possible failures in rear power take-off shaft and guidelines for trouble-
shooting
List of possible failures of rear power take-off shaft and guidelines for troubleshoot-
ing are shown in Table 7.6.
Table 7.6
Failure, external manifestations,
cause
Troubleshooting
Rear PTO shaft end extension does not rotate upon start-up
PTO mode selection handle is
not shifted in independent drive
position
Check and shift the handle in up position
Improper adjustment of valve
control
Adjust valve control
Oil pressure loss at valve input
or at valve output to PTO friction
coupling
Check pressure at control valve input, in case there is no
pressure correct the trouble of transmission hydraulic sys-
tem. In case there is no pressure at valve output to PTO
friction coupling replace the control valve
Rear PTO shaft does not transmit full torque (“skidding")
Improper adjustment of valve
control
Adjust valve control
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