Repair methods for common faults of hydraulic piston pumps

1. The piston pump cannot start

When the variable displacement piston pump fails to start, there are many possible reasons, such as power failure, motor failure, control circuit problems, or damage to the internal components of the hydraulic pump. First, check whether the power is on and whether the motor is working properly. If the power supply and motor are normal, check whether the control circuit has problems. If there are no problems with the above, then the internal components of the oil pump may be damaged, and the pump needs to be disassembled for inspection and repair.

2. Insufficient flow of piston pump

When the flow of the hydraulic piston pump is insufficient, it may be due to a variety of reasons, such as wear of the internal components of the pump, high oil viscosity or low oil tank level. First, check whether the internal components of the pump are worn. If so, they need to be replaced. Secondly, check whether the viscosity of the oil is too high. If so, replace it with a low-viscosity oil. Finally, check whether the oil tank level is too low. If so, increase the amount of oil.

3. The piston pump is too noisy    

When the variable displacement piston pump makes too much noise, it may be due to a variety of reasons, such as loose internal components of the pump, air in the oil, or incorrect installation of the pump. First, check whether the internal components of the pump are loose. If so, tighten them. Secondly, check whether there is air in the oil. If there is air, exhaust it. Finally, check whether the installation position of the pump is correct. If not, adjust it.

4. Large pressure fluctuations in the piston pump

When the pressure of the piston oil pump fluctuates greatly, it may be due to a variety of reasons, such as damage to the internal components of the pump, impurities in the oil, or blockage in the outlet pipe. First, check whether the internal components of the pump are damaged. If so, they need to be replaced. Secondly, check whether there are impurities in the oil. If there are impurities, filter treatment is required. Finally, check whether the outlet pipe is blocked. If blocked, it needs to be cleaned.