10-2 KL120
TROUBLESHOOTING
Problem
This Troubleshooting Chart is provided for reference to possible loader operational problems.
Determine the problem that best describes the operational problem being experienced and eliminate the possible causes as listed by
following the correction procedures.
Possible Cause Correction
Lift and Bucket cylinders
inoperative.
Low hydraulic fluid level.
Hydraulic hoses connected improperly.
Hydraulic hoses to/from control valve
blocked
Loader control valve or tractor main
relief valve stuck open.
Low system pressure supplied from
hydraulic pump.
Control valve linkage broken.
Quick disconnect coupler(s) are not fully
connected or "Flow Check"
Hydraulic hose or tubeline blockage.
Cylinder piston assembly defective(not
sealing)
Control valve blockage.
Check and replenish hydraulic fluid.
Check and correct hydraulic hose connections.
Check for damage(kinked) hoses, etc.
Check system pressure. Repair or replace relief
valve.
Check system pressure.
Repair or replace pump.
Inspect. Repair as required.
Check coupler connections.
Replace coupler(s) if necessary.
Check for evidence of damage to hoses or
tubelines that would block flow of oil between
cylinders and control valve.
Check cylinders for internal leakage as described
in service section under cylinder leakage tests.
Inspect for blockage. Disassemble valve if
necessary.
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