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What Are The Common Hydraulic Motor Failures?

Aug 22, 2019

I. The speed of the five-star hydraulic motor decreases and the output torque is reduced.

The reason sits may be:

1. Motor serious external leakage: check the contact surface of the oil plate housing body and the seal stodged by the components, check that the hydraulic oil is too thin temperature is too high.

2. Large leakage in the motor: check whether the sealing ring and the oil pan on the oil distribution plate are worn and whether the motor enters and leaves the oil cavity channel is colluding.

3. There is a problem with the hydraulic system part (check for hydraulic system failure).

Ii. Five-star hydraulic motor does not turn and has no pressure:

1. Check the connection parts of the motor crankshaft and the oil supply plate (double-header keys are broken).

2. There is no pressure in the hydraulic system, which causes the motor to not work.

NIM3-400 (11)(001)

III. Unusual noise struck when the five-star hydraulic motor is operating due to:

1. The extended shaft of the motor is against the drive shaft (mainly the protruding shaft is too long, not checked in assembly, and there is the return screw of the drive shaft stop loop loose, resulting in the drive shaft loose).

2. The connecting rod and the bearing sleeve bite each other or damage (check whether the bearing wear gap of the drive shaft is too large, causing the drive shaft to sway and produce excessive radial force) 3. The card ring breaks, the bottom bearing bites to crack (check the concentricity of the drive shaft and the motor output shaft).

4. External vibration (mainly the motor seat is not strong enough or the fixing screws are not locked).

5. Noise or air entering the motor of the hydraulic system itself.

IV. The five-star hydraulic motor housing oil leakage is mainly:

1. The housing casting has sand eye.

2. The seals at each connection are damaged or aging (hardened) deformed.

3. Bearing wear causes the output shaft to run to damage the shaft seal (skeleton seal).


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