Failure | Possible cause | Method |
The jack can not lift or the stroke cannot reach | 1. the lifting rob is local deformation or leans | a. shake or liberate the rob before lifting b. change or straighten the rob |
2. the fixture blocks are badly worn or the bases are damaged or the springs of blocks are lost and tired | change the fixture blocks or bases or springs | |
3. retracting spring is damaged or badly disfigured | change the retracting spring | |
4. fuel starvation | adjust the pressure of the pump | |
5. overload | light load | |
oil impregnate or oil leakage | 1. the sealing members are damaged or badly worn or worn out | change the sealing members |
2. the cylinder body napping | repair or change the body | |
loose connections or the sealing members are damaged | screw connections or change sealing members | |
quick couplers are leaking oil | the connects or the O-rings are damaged | change the connects or O-rings |