The travel motor is equipped with a high-pressure automatic variable device. When the high-speed gear is engaged, the circuit connects to the manual shift oil port to supply oil, pushing the shift valve to the left, changing the motor to a small displacement; if the driving resistance increases causing the oil pressure to rise to the set value, the oil pushes the shift valve to the right, automatically changing the motor to a large displacement low-speed gear to increase torque. Specifications: Customizable according to actual conditions.
