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XCMG QY20B crane turns fast and slow

Fault phenomenon: Xugong QY20B crane rotates fast and slowly。 Fault description: get on the train and rotate fast while slow. Observe that the pressures on both sides are different during field operation. Cause analysis of failure:  1: The positioning screw of the rotary buffer valve stem is loo... Read More

XCT25L5 three-four-five arm can’t be extended

Malfunction phenomenon: XCT25L5 345 joint arm cannot extend out。 Fault description: XCT25L5 has no action when extending two arms and then extending three or four or five arms, and the two arms extend normally. Cause analysis of failure: electrical failure. Troubleshooting steps and methods: 1：... Read More

XCMG QY25K5-QY50K (including QY50B) crane’s second arm and three four five arm do not change direction.

Malfunction phenomenon: XCMG QY25K5-QY50K (including QY50B) crane’s second arm and three four five arm do not change direction. Fault description: on the car two arms shrink normally, three four five arms can not switch telescopic. Analysis of the cause of the fault: 1: The solenoid valve o... Read More