Emergency Steering Check Block - Hitachi ZW180 Technical Manual

EMERGENCY STEERING CHECK BLOCK

The emergency steering check block is installed
between the main pump and the steering valve.
The built-in check valve prevents delivery oil from the
emergency steering pump from flowing to the main
pump.
A
Y
Y
X
COMPONENT OPERATION / Others
B
C
E
D
A: from main pump
B: from emergency steering pump
C: pressure sensor mounting port
D: to steering valve
E: to hydraulic oil tank
Section X-X
A
Section Y-Y
A
X
T3-12-3
B
D
C
E
T4GB-03-12-007