1, the piston does not actively rise: it is very likely that the oil mercury station of the manual hydraulic jack is not filled with oil, and secondly, the upper and lower parts of the oil cylinder or the sealing cavities on the left and right sides of the hydraulic control valve are damaged to some extent, so the vacuum pressure completely escapes. At this time, it is only necessary to overhaul the oil mercury part and replace the O-ring to ensure its sealing performance in the future.

2. When the pressure rises, the piston will not move: This situation is mainly caused by garbage or foreign objects in the quick connector of the manual hydraulic jack, which blocked the pipeline. If there are foreign objects in the hose, a similar situation will occur. At this time, it is necessary to check the clean joint of the jack or check various parts under the condition of ensuring power failure. At the same time, all channels should be blown clean with compressed air bags to keep the relevant pipes unblocked.

Extended data:

Precautions:

1.In case of idle stroke of RCS series thin jacks during use, loosen the oil drain screw on the pump body to make the pump body vertically idle for several times, and then tighten the oil drain screw to continue using. ?

2. The high-pressure tubing was tested by105mpa (1050kgf/cm2) before leaving the factory. However, due to the aging of rubber hose, users need to check it frequently, usually for six months, and frequent users for three months. During inspection, the pressure test shall be carried out at 87.5Mpa(875Kgf/cm2), and explosion, bulging and leakage shall not be used. ?

3. In the process of operation, technical specifications should be strictly observed, and users should conduct regular inspection and maintenance according to the usage.