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6.10 Possible failures of FDA and instructions for their troubleshooting
The list of possible failures of front driving axle and instructions for their troubleshooting
are shown in Table 6.10.
Table 6.10
Failure,
external manifestation, cause
Faulty toe-in of front wheels
Noncompliance of pressure in tires
to the recommended standards
Front axle is constantly forcedly
engaged
No pressure in the clutch booster
Failure of system electrics
Low pressure in the transmission
hydraulic system
Increased leakage in drive control
hydraulic system:
- wear of piston and drum O-rings;
- wear of mating surfaces sleeve –
drum hub, drum – piston;
- wear of disk packs
Disconnect switch of FDA drive
automatic
engagement
got out of adjustment
Increased clearance in the driving
gear bearing of reduction unit
Side clearance in the main pair of
central reduction unit got out of ad-
justment
Increased wear and delaminating of front tires
Adjust toe-in of front wheels as indicated in section
5 "Maintenance service".
Adjust pressure in tires as indicated in subsection
3.2.8 "Selection of optimal
tires depending on operating conditions and tractor
axle load"
Do not use the mode "FDA on" all the time. If FDA
is constantly engaged for the reason of FDA con-
trol failure, eliminate it
Drive clutch fails to transmit torque
Disassemble the distribution valve, rinse the case
and spool
Detect and eliminate the failure in ECS of FDA
Insufficient value of torque transferred
Adjust pressure in the transmission hydraulic sys-
tem to the value from 0.9 to 1.0 MPa
Replace O-rings
Replace worn-out parts
Replace worn-out parts
Drive fails to operate in automated mode
Adjust the disconnect switch of FDA drive automatic
sensor
engagement sensor
Increased noise generated by main gear
Check and adjust gear bearings, if necessary
Adjust the side clearance in the main pair of central
reduction unit
Troubleshooting
188
1523.5-0000010 OM
inflation pressure in
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Troubleshooting
