2022.3-0000010 OM
314
Oil pressure loss in transmission hydraulic system
Breakdown of gear wheel pump in
transmission hydraulic system
Replace gear wheel pump of transmission hydraulic
system
Transmission hydraulic system
pump actuator
Engage transmission hydraulic system pump ac-
tuator
Damaged parts of transmission hy-
draulic system pump actuator
Replace damaged parts of transmission hydraulic
system pump actuator
High oil pressure in transmission hydraulic system
Oil does not corresponds to the
current season (ambient tempera-
ture)
Fill in corresponding seasonal oil
Deadlock of distributor-filter by-
pass valve
Rinse distributor-filter bypass valve
Increased noise
Insufficient oil level in transmission
Check oil level in transmission as indicated in sec-
tion 6 “Maintenance service”. Refill oil up to the re-
quired level if necessary.
Wear or breaking of bearings of
other transmission components
Replace bearings
7.11 Possible failures of FDA and guidelines for troubleshooting
List of possible failures of front driving axle and guidelines for troubleshooting are
shown in Table 7.11.
Table 7.11
Failure,
external manifestations, cause
Troubleshooting
increased wear and delaminating of front tires
Faulty toe-in
Adjust toe-in as indicated in section 6 “Maintenance
service”.
Noncompliance of pressure in tires
to the recommended standards
Adjust pressure in tires as indicated in subsection
4.2.8 “Choice of optimal inflation pressure of tire
depending on operating conditions and tractor axle
load, and tires operating rules”
Drive clutch does not transmit torque
Pressure loss in clutch booster
Disassemble distribution valve, rinse case and
spool
Failure of system electrics
Detect and correct trouble in ECS of FDA
Insufficient value of torque transferred
Low pressure in transmission hy-
draulic system
Adjust pressure in transmission hydraulic system
up to the value 0.9 to 1.0 MPa
Increased leakage in drive control
hydraulic system:
- wear of O-rings of piston and
drum;
- wear of mating surfaces sleeve –
drum hub, drum – piston;
Replace O-rings
Replace worn-out parts
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