Hitachi ZW180 Technical Manual page 140

Ride Control Circuit (Optional)
(Refer to SYSTEM / Control System Electric / the
Hydraulic Combined Circuit Control in group.)
•
In front attachment operation, operating pressure
from the lift arm cylinders is accumulated in the
ride control accumulator through the charge cut
spool.
•
When the ride control switch is turned ON, the
ride control solenoid valve is excited, and the
spool moves downward.
•
As the bottom end of the lift arm cylinder is
connected to the ride control accumulator, the rod
side of the lift arm cylinder is connected to the
hydraulic oil tank.
•
In this way, the force to raise the front attachment
is relieved to the hydraulic oil tank, and the force
to lower the front attachment is absorbed by the
ride control accumulator. Therefore, the machine
travels stably when traveling on rough roads.
SYSTEM / Hydraulic System
T2-3-24