COMPONENT OPERATION / Steering Valve

The steering valve is located between the priority valve and the steering cylinder.

The steering valve supplies pressure oil from the main pump to the steering cylinder through the priority valve in response to the movement of the steering wheel.

(Refer to SYSTEM / Hydraulic System / Steering Circuit.)

The overload relief valve and the make-up valve are provided in the steering valve.

The overload relief valve is operated when the circuit pressure between the steering cylinder and the steering valve is beyond the set pressure. The make-up valve is operated when the circuit pressure between the steering cylinder and the steering valve is lower than the pressure in the hydraulic oil tank.

T3-3-1