(1) One-way valve: The function of this valve is to ensure smooth start and stop, and together with the balance valve to prevent cavitation in the walking motor circuit.
(2) Pressure reducing valve: The function of this valve is to reduce the pressure of the hydraulic oil diverted from the walking motor to prevent sudden action of the brake, and to deliver the decompressed pressure oil to the parking brake release port.
(3) Reciprocating valve for parking brake release: The function of this valve is to divert the hydraulic oil used for the operation of the walking motor to the pressure reducing valve.
(4) Overload safety valve: The function of this valve is to prevent overload and shock pressure in the walking motor circuit.
(5) Reciprocating valve for servo piston operation: This valve is used to divert the pressure oil dedicated to the travel motor to the servo piston.
(6) Balance valve: The function of this valve is to ensure the smooth start and stop of the walking motor, and to prevent the excavator from overspeeding when it is walking downhill.
