Fault phenomena |
Fault cause |
Solution |
Serious noise |
Oil sucking filter blockage |
Cleaning filter |
Low viscosity of oil |
Replacement of hydraulic oil with suitable viscosity |
Low oil surface in oil tank |
Add oil to the upper limit of the oil mark |
Oil suction pipe joint leakage |
Tighten the joint or replace the O ring of the oil sucking flange |
Coupling loosening |
Repair or replace a coupling |
Wear or damage of oil pump |
Repair or replace an oil pump |
Piping vibration |
Screw the screw to tighten the connecting line |
Down vibration and loud noise of the main cylinder |
The pressure of the balance valve is too large |
Reduce the pressure of the support valve to the medium plate without falling |
Lack of pressure or pressure |
Overheating of oil pump |
Reduce oil temperature or repair oil pump |
Wear or damage of oil pump |
Repair or replace an oil pump |
Low viscosity of oil |
Use the recommended hydraulic oil |
Damage or failure of pressure regulating valve |
Cleaning, repair or replacement of pressure regulating valve |
Damage of piston seal |
Replacement of piston seals |
Main cylinder slide |
Upside pressure relief valve has dirty card |
Cleaning, repairing or replacing the overflow valve |
Damage of fast cylinder seal |
Replacement of fast cylinder seal |
The downlink of the main cylinder can not go down after slow down |
Failure or damage of the filling valve |
Repair or replace a fluid filling valve |
There is no fast or no slow down speed in the main cylinder |
Quick turn slow solenoid valve malfunction |
Cleaning, repairing, or replacing a solenoid valve |
The main cylinder is slow or can't go up |
The high upward pressure is the failure of the filling valve |
Repair or replace a fluid filling valve |
Low uplink pressure is insufficient for uplink pressure or damage of fast cylinder seal |
High pressure or replacement of fast cylinder seal |