The main function of the rotary device of hydraulic excavator is to connect the rotary table of the excavator with the vehicle of the excavator, so as to ensure that the excavator can not tip over and that the rotary action of the excavator is light and flexible. Excavator can carry out excavator and rotary action, but it is accompanied by intermittent abnormal sound. The specific performance is that the temperature of rotary gearbox is higher after a period of operation. This kind of fault is often caused by the gear wear in the gearbox. The specific elimination method is to dismantle and inspect the gearbox and replace the damaged gear.
