Hitachi ZW 120-6 Operator's Manual page 190

AUTO
When ride control switch (1) is turned to AUTO, the drive
speed sensor and the controller is activated. Then, when the
drive speed becomes faster than the preset travel speed, the
ride control system automatically operates.
When the drive speed becomes slower than the preset
travel speed, the ride control system becomes inoperable.
When ride control switch (1) is turned to AUTO mode, ride
control indicator (2) on the monitor display comes ON.
OFF
When ride control switch (1) is turned OFF, ride control
indicator (2) on the monitor display goes OFF and the ride
control system becomes inoperable.
When the key switch is in the OFF position, the ride control
system does not operate even if ride control switch (1) is
in AUTO position. When the engine is stopped while ride
control switch (1) is in AUTO, the ride control is turned OFF.
OPERATING MACHINE
5-4
1
AUTO
OFF
2
1
MNDB-01-005
MNEC-01-022
MPTC-01-019