① The working speed control of the prime mover is not enough to find out the main reasons, analyze and adjust.
② The filter screen of the oil suction plant is blocked, cleaning or replacing the core.
③ The oil quantity in the tank is insufficient or the diameter of the oil suction pipe is too small, which is easy to cause sufficient oil suction and appropriate increase the diameter of the pipe, so that the oil suction is difficult to smooth and the oil supply is insufficient.
④ The seal is not tight, there is leakage, air intrusions, and tighten the relevant joints. Prevent leakage or air intrusion.
⑤ The viscosity of the oil is too large.
⑥ The axial and radial clearance of the hydraulic pump is too large, and the internal leakage increases.
⑦ Mechanism failure, repair or replacement.
