Hitachi ZW180 Technical Manual page 143

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 Spool
LS 1
Pilot
Main Pump
Pump
T2-3-27
Steering
Accumulator
Steering Valve
Hydraulic Oil Tank
Spool
Pump
Delivery
Pressure
Switch
To Control
Valve
Priority
Valve
Spring
LS 2
Hydraulic
Oil Tank
Emergency Steering
Pump Delivery
Pressure Switch
Emergency
Steering
Pump Unit
T4GB-02-02-023