Parking Brake Solenoid Valve - Hitachi ZW180 Technical Manual

PARKING BRAKE SOLENOID VALVE

Pressure oil from the pilot pump is accumulated in the
pilot accumulator and its pressure always acts on the
inlet of the parking brake solenoid valve.
COMPONENT OPERATION / Charging Block
Parking Brake
Solenoid Valve
When the parking brake solenoid valve is operated,
pressure oil in the pilot accumulator flows to the park-
ing brake through the spool and releases the parking
brake.
T3-7-10
Port for Mounting
Pilot Accumulator
T4GD-03-07-003