Hitachi ZW180 Technical Manual page 135

Bucket
Pilot Valve
1 2
Pilot Shut-Off
Valve
Charging Block
NOTE: Numeral of each port of the pilot valves and
the control valve shows the port to be
connected.
The illustration shows the oil flow in neutral
condition of the pilot valve when the service
brake accumulators are pressurized, the
priority valve is open, and the pilot shut-off
valve is open.
SYSTEM / Hydraulic System
Lift Arm
Pilot Valve
Valve (Optional)
3 4 5
To Service Brake
Circuit
Service Brake
Accumulator
Priority Valve
PP
Auxiliary Pilot
6 7 8
Auxiliary 2
8
Auxiliary 1
6
Bucket
2
Pilot Pump
Lift Arm
4
T2-3-19
Control Valve
7
5
1
Slow-Return
Valve
Main Pump
3
T4GD-02-03-003