Listed are the key components related to the operation of a steering and brake control valve.
The pilot valve (1) regulates the pilot pressure in the pilot pressure chamber. In the brake valve, it provides a volume of oil for operating shut off valve assembly.
The accumulator piston (2) reduces the fluctuation of pilot pressure.
The proportional solenoid valve (3) determines the level of force used to steer and stop the machine.
The reducing spool (4) regulates the flow of oil to the clutch and brake.
The parking/secondary solenoid brake valves (5) enable the operator to apply the brake immediately, without modulation by the shut off valve.
The shutoff valve (6) drains the brake pressure gradually if the pilot valve pressure drops suddenly.