The running deviation of crawler hydraulic excavator for a municipal engineering occurred during the working process. The fault phenomena are: when moving forward, it will run to the right and the reverse will also run to the right. The boom, stick, bucket and rotary device of the failed excavator work normally.
According to relevant data and maintenance experience, the factors that may cause the track hydraulic excavator to run to one side are as follows:
1. mechanical system failure
The track on both sides is not parallel and the tension is inconsistent; The axis of the driving gear, guide wheel, roller and carrier wheel is obviously inclined.
2. hydraulic system failure
The flow and pressure difference of the double pump is too big; The main valve core is stuck or there is internal leakage; The seal of the central swivel is aged or damaged; The travel motor is worn, leaking or the control valve is stuck.
