Analyze the problem of slow lifting speed of manual hydraulic jack

The manual hydraulic jack combines the manual pump and the electric pump organically. It has both the quick fuel supply of the electric pump and the micro feed of the manual pump. It can be flexibly inserted between the manual and the electric motor. Unable to reach the working state. However, in the process of using, the manual hydraulic jack will always encounter a slow lifting speed. How should it be solved?

This phenomenon is generally caused by too little oil in the oil pump. Add the required hydraulic oil according to the model of the oil pump. The oil pump pressure relief valve is not tightened or the hydraulic pressure connector is loose and not tightened. Then there is a need to carefully check whether the interfaces are leaking. Oil ring connector loose. Manual hydraulic jack can not be retracted or slow. This situation needs to check whether the pressure relief valve is open, the amount of oil in the fuel tank is not too much, according to the size of the fuel tank to store the retracted hydraulic oil, observe the oil Is the crimping joint tightened?