Manifestation: Oil stains on pipe or cylinder joints.
Possible causes: aging seals, loose connections, scratches on cylinder walls.
Solution: replacement of seals, tightening of connections, major repairs or cylinder replacement.
Abnormal lifting/lowering speed
Manifestation: fork movement is slow or jammed.
Solution: replenish hydraulic oil, repair or replace valve and pump.
Phenomenon: A “buzzing” or “shrill” sound occurs during operation.
Possible causes: air in the fluid, clogged filter element due to air suction, worn pump shaft.
Solution: Empty the system, clean/replace the filter element and service the pump.
