Rexroth hydraulic pump - common faults and treatment methods of piston pumps

Create Date: 2024-8-30 12:03:23|Source: Rexroth/Rexroth

1. The output flow of the hydraulic pump is insufficient or does not output oil

Piston pumps often suffer from insufficient suction, excessive leakage, or too small an inclination angle. The insufficient suction volume is mainly caused by the high resistance of the suction pipe or the insufficient oil replenishment, such as the pump speed is too fast and the oil level is too low; If the leakage is too large, the gap of the pump may be too large, and the tilt angle of the tilting disc is too small due to poor sealing, so it is recommended to adjust the inclination angle.

2. The oil discharge is not zero in the median

Usually when the inclination of the swash plate of the piston pump is zero, the output flow of the pump is zero, but when in use, although the inclination of the piston pump is zero, there is still a flow output, which is generally caused by the deviation or looseness of the controller, etc., it is recommended to readjust. In addition, the pump itself is not sufficiently angled, the force is forced, or the tilt angle is worn.

3. Output traffic fluctuations

The piston pump will have fluctuations in output during use, most of which may be caused by poor control, which may be caused by foreign objects in the pump, scratches or wear of the control piston, resulting in fluctuations in the control piston. In addition, too little amplifier energy or damaged parts can also cause instability in the control piston. In the event of this kind of failure, the hydraulic pump needs to be disassembled and repaired and replaced.

4. The output pressure is abnormal

The pressure output of the hydraulic pump is abnormal, usually it may be caused by too low pressure or too high pressure, the pressure is too low, it may be that the inlet pipe is leaking, the pressure cannot go up, it is recommended to find the air leakage, replace or fasten the parts; : If the pressure is too high, it is due to the overload of the pump, and the hydraulic components such as directional valves and pressure valves should be checked.

Rexroth hydraulic pump - common faults and treatment methods of piston pumps

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