Belarus 82.3 - Troubleshooting

82.3-0000010 OM
232
6.10.2 Possible failures of the hydraulic lift linkage without draft control unit
and instructions for troubleshooting
The list of possible failures in the HLL without draft control unit and guidelines for
troubleshooting are given in Table 6.10.2
Table 6.10.2
Failure,
external manifestation
Troubleshooting
RLL fails to rise with agricultural implement attached
There is no pressure in the hy-
draulic system:
- sticking of the bypass valve of
the distributor;
- clogging of the safety valve of
the distributor;
- clogging of the grid of the safe-
ty valve of the distributor;
- insufficient amount of oil in the
tank.
Remove valve parts, wash and install in the body.
The valve must move freely
Disassemble the safety valve, flush, reinstall. Ad-
just valve operating pressure
Clean the safety valve grid
Add oil to the tank to the recommended level
Loss of pump performance
Check pump performance, replace if necessary
Weight of the implement ex-
ceeds the al
lowable weight for
the tractor RLL
Use agricultural implements agreed with the man-
ufacturing company
Slow rise of RLL with agricultural implement attached
Air leakage into the hydraulic
system
Locate the leak and fix the defect
Loss of pump performance
Check pump performance, replace if necessary
Weight of the agricultural imple-
ment exceeds the allowable
weight for the tractor lift linkage
Use agricultural implements agreed with the man-
ufacturing company
Foaming of oil in the tank and splashing through the breather
Air leakage into the system
through the suction line
Tighten the fastening and, if necessary, replace
the gaskets of the suction pipe
Air leakage through the self-
tightening seals of the HLL oil
pump
Check the condition of the self-tightening seals
and replace if necessary.
Oil level in the tank is too high
Drain excess oil to reach the recommended level
Increased oil heating during system operation
Insufficient amount of oil in the
tank
Add oil to the tank to reach the recommended lev-
el
Oil lines bent or crushed
Repair dents or replace the oil line
Sticking of the hydraulic distribu-
tor spool
Return the hydraulic control levers to the "neutral"
position after the operation is completed.
Consumption of implement hy-
draulic motors does
not match
the tractor pump flow
Use agricultural implements agreed with the man-
ufacturing company
Agricultural implement fails to hold in transport position
(lowering speed exceeds 20 mm within 10 min)
Oil leakage through piston seals
or cylinder rod seals
Replace cylinder seals or replace the cylinder
Oil leakage through the distribu-
tor spool
Replace the distributor
Note - The hydraulic circuit diagram for the HLL without draft control unit is present-
ed in Annex B in Figure B2.