The power take-off must not be in the "on" position when driving.
If it is in the "on" state (the red light is on), the oil pump will continue to rotate, and the hydraulic system will have a power source. This will cause the car to automatically lift due to misoperation on the pneumatic control valve; Even if the control distribution valve is in the "down" position, oil must enter the oil pump, which will burn out the oil pump.
