Fault Performance

Cause Analysis

Troubleshooting Method

Hydraulic system not functioning

Air leakage in the pipeline system

Seal the leaking pipe section

Pneumatic piston of the power take-off is stuck

Remove the obstruction

Damage at the connection between the power take-off and the oil pump

Replace

Electronic control system not functioning

Grounding in the circuit, fuse blown

Check the circuit and replace the fuse

Disconnection in the system circuit

Inspect the circuit and reconnect the disconnection

Cylinder stroke reduced

Insufficient hydraulic oil

Refill oil

Insufficient hydraulic system pressure or pressure fails to rise

Low oil pump speed

Check engine speed

High oil temperature, viscosity reduced

Operate after oil temperature lowers

Overflow valve malfunction

Clean, repair, or replace

Large flow pulsation or pressure pulsation

Significant air mixed in the oil

Release air or replace with new oil

Directional control valve malfunction

Repair or replace

Severe noise

Air intake or air mixed in

Identify and eliminate the cause

Clogged filter causing oil pump suction loss

Clean the filter

Cylinder fails to perform sequential actions

Foreign object blocking the proximity switch

Remove the foreign object

Proximity switch installation is loose

Tighten the proximity switch

Cylinder does not move

Directional control valve fails to switch

Repair or replace