The reasons can be divided into the following:
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(1) Oil leakage at the shaft end: due to the constant friction between the oil seal and the output shaft in the daily use of the hydraulic motor, it will inevitably lead to the wear of the contact surface between the oil seal and the shaft, and the oil seal will lose its sealing effect beyond a certain limit, resulting in oil leakage. This is one of the most common causes of leaks. Solution: Replace the oil seal. If the output shaft is seriously worn, replace the output shaft at the same time. (Different manufacturers of hydraulic motor parts are not necessarily universal, so be sure to consult clearly when buying, otherwise the size is wrong, it will not solve the problem)
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(2) Oil leakage at the cap: the \"O\" ring under the cap is crushed or aging and loses the sealing effect, the probability of this situation is very low, if it occurs, just replace the \"O\" ring.
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(3) Hydraulic motor cleat oil leakage: The \"O\" ring between the hydraulic motor housing and the front side plate, or the front side plate and the stator body, or the stator body and the rear side plate is aging or crushed, if this happens, only the \"O\" ring can be replaced. At the same time, check whether the system pressure exceeds the rated pressure of the hydraulic motor, because the hydraulic motor overpressure work for a long time will also cause this problem.
The reason for the Parker 110 motor to punch the oil seal may be: the motor shaft and the oil seal are different, resulting in wear or failure of the oil seal.
Aging or damage of oil seal, resulting in reduced sealing performance.
The pressure of the hydraulic system is too high, resulting in the damage of the oil seal under too much pressure.
The hydraulic oil contains impurities or foreign bodies, resulting in wear or blockage of the oil seal.
Improper installation of the motor causes a gap between the oil seal and the shaft, resulting in leakage.
Vibration or shock occurs during motor operation, resulting in oil seal damage.
The hydraulic oil temperature is too high, resulting in aging or damage to the oil seal material.