Hitachi ZW180 Technical Manual page 250

Layout
Port A
Port B
Port Pa
Port A: Right Steering Pressure
Port P: From Main Pump
COMPONENT OPERATION / Steering Valve
4 1
5 6
Port DR
Port B: Left Steering Pressure
Port T: Returning to Hydraulic
Oil Tank
2
4
Port P
Port LS
Port Pa: Right Steering Pilot
Pressure
Port LS: To Port LS of Priority
Valve
T3-5-2
3
Port T
Port Pb
5
Port Pb: Left Steering Pilot
Pressure
Port DR: Returning to Hydraulic
Oil Tank
T4GB-03-04-002