Three minutes to learn how to adjust the main relief valve when excavator is powerless, the machine problem is solved! Speaking of the main relief valve, even the newly arrived machine is no stranger, enough to see the importance of the valve! It can be said that most of the excavator's inability to move, brakes and other faults are inextricably linked to the valve. Since the main relief valve is so important, how to accurately determine the fault when the valve is abnormal, and solve the fault accurately by adjusting the main relief valve by itself? Don't worry, the expert will introduce you in detail.