Pilot Shut-Off Valve - Hitachi ZW180 Technical Manual

Operational principle, wheel loader
Hide thumbs Also See for ZW180:
Table of Contents

Advertisement

PILOT SHUT-OFF VALVE

The pilot shut-off valve is a munually operated
selection valve, and by operating the pilot shut-off lever,
rotates the spool in order to turn ON and OFF pilot
pressure oil to the pilot valve.
When Pilot Shut-Off Lever is in LOCK Position
When the pilot shut-off valve is turned OFF, pressure
oil from the pilot pump does not flow to the pilot valve.
Pressure oil at the pilot valve side flows to the
hydraulic oil tank.
When Pilot Shut-Off Lever is in UNLOCK Position
When the pilot shut-off valve is turned ON, the drain
circuit is blocked and pressure oil from the pilot pump
flows to the pilot valve.
T1
T3
A5
A1 - Auxiliary
A2 - Auxiliary
A3 - To Pilot Valve (Optional)
COMPONENT OPERATION / Others
A2
A1
T2
A3
P
A4 - To Pilot Valve
A5 - Auxiliary
P - From Brake/Pilot Pump
T3-12-1
Section Z-Z
From Brake/
Pilot Pump
Z
Z
A4
T1 - From Pilot Valve
T2 - Auxiliary
To Pilot
Valve
T4GB-03-12-001
T4
T4GB-03-12-002
T3 - From Pilot Valve (Optional)
T4 - To Hydraulic Oil Tank

Hide quick links:

Advertisement

Table of Contents
loading

Table of Contents