Hitachi ZW180 Technical Manual page 145

Steering
Pilot
Valve
Steering
Wheel
NOTE: The illustration shows the pressure oil flow
when the steering wheel is turned to the
right.
SYSTEM / Hydraulic System
Steering Cylinder
Orifice
Orifice
Gerotor
Pilot
Hydraulic
Pump
Oil Tank
Steering
Accumulator
Steering Valve
Pump
Delivery
Pressure
Switch
Spool
Spring
LS 2
LS 1
Main Pump
T2-3-29
Spool
Emergency
Steering
To Control
Pump Delivery
Valve
Pressure Sensor
Priority
Valve
Emergency
Steering
Pump Unit
T4GB-02-02-023