Hyundai HX140L, Manual

Page: 81 / 819

2-28
HOLDING VALVE OPERATION
HOLDING OPERATION
At neutral condition, the pilot piston chamber is connected to drain port through the pilot port.
And the piston "B" is supported with spring "B".
Also, the pressured fluid from actuator entered to inside of the holding valve through the
periphery hole of check, crevice of the check and the plug and the periphery hole of plug.
Then, this pressured oil pushed the poppet to the poppet seat and the check to the seat of body.
So the hydraulic fluid from actuator is not escaped and the actuator is not moved.
4)
(1)
PILOT PISTON CHAMBER
ACTUATOR PORT DRAIN PORT
PILOT PORT
FOR RELEASE
HOLDING VALVE
PISTON "B"
SPRING "B" PISTON "A"
CHECK VALVE SPRING "A"
POPPET
CHECK
POPPET SEAT
PLUG
14W92MC15