The cab vibration of construction machinery excavator is abnormal. First, check whether the shock absorbers at the four corners of the cab are loose. When the shock absorber screw is loose, the vibration of the cab is abnormal, especially when the engine speed is high, the shaking of the cab and the surrounding glass is particularly obvious. Therefore, the vibration can be eliminated by tightening the screws of the shock absorber. Boom shaking is mainly the sound of the cylinder. At this time, check the boom check valve for wear. If so, when the hydraulic oil is delivered to the boom cylinder through the valve core, the action will be incoherent, and the amplitude of the boom will increase with the increase of the action frequency. When there is a hook sound in the rotating parts, there will be slight vibration in the cab, which is caused by impurities between gears or gear fracture.
