Hydraulic pump common fault and maintenance methods

Hydraulic pump common fault and maintenance methods Machine failure is inevitable, but we can prevent and solve the problem on it. Oil pump (hydraulic pump) suction or no pressure on the suction 1. The original motive and pump rotation is inconsistent --- correct prime mover rotation. 2. Hydraulic pump drive button off --- reinstall the drive button. 3. In and out of the oil port reversed --- according to the manual selection of the correct way. 4. The fuel tank is too low, the suction nozzle exposed liquid level --- additional oil above the minimum oil line. 5. Speed ​​is too low suction --- raise the speed to reach the minimum speed of the pump. 6. Oil viscosity is too high, making the blade movement is not flexible --- choose the recommended viscosity of the working oil. 7. Oil temperature is too low, so that the oil viscosity is too high --- heat up to the recommended normal working oil temperature. 8. Suction pipe or filter blockage caused by poor oil absorption --- Clean the pipe or filter device to remove clogs, replace or filter oil tank. 9. Suction inlet filter caused by high filtration accuracy is poor --- according to the correct selection of filters. 10. Low precision oil filtration system led to the leaves stuck in the tank --- Unpacking, grinding pump internal organs, carefully reload, and replace the oil. 11. Small displacement hydraulic pump Insufficient suction --- fill the pump filled with oil. 12. Inhalation pipeline leak --- Check the pipe connections, and be sealed, strong. Oil pump (hydraulic pump) flow less than the rated value 1. Speed ​​did not reach the rated speed --- specified by the manual rated motor speed speed. 2. There is a leak in the system --- check the system, repair leaks. 3. Due to the oil pump working for a long time, the vibration will loosen the cap screw --- tighten the screw properly. 4. Inhalation pipeline leak --- Check the connection, and be sealed, tighten. 5. Insufficient oil absorption: ① tank surface oil is too low --- additional oil to the lowest oil line above; ② inlet filter plugged or through the flow rate --- cleaning filter or the selection of the flow through the pump flow 2 Times more than the oil filter; ③ suction pipe is blocked or small diameter --- clean the pipe, use suction pipe diameter of not less than the entrance of the pump; ④ oil viscosity is too high or too low --- choose the recommended viscosity of the working oil. 6. Variable pump flow adjustment is not correct --- readjust to the required flow. Oil pump (hydraulic pump) can not increase the pressure 1. Oil pump is not on the oil or insufficient flow - with the above exclusion method. 2. Relief valve to adjust the pressure is too low or faulty --- re-commissioning pressure relief valve or repair relief valve. 3. There is a leak in the system --- check the system, repair leaks. 4. As the pump working vibration for a long time, the pump cover screws loose - tighten the screws properly. 5. Inhalation pipeline leak --- check the connections, and be sealed and tightened. 6. Insufficient absorption --- the same as above exclusion method. 7. Variable pump pressure adjustment is not correct --- readjust to the required pressure.