Hitachi ZW 120-6 Operator's Manual page 88

 Axle Oil Hour Meter
Screen Y and time screen Z indicating the remaining hours up
to axle oil change are alternately displayed.
When the remaining hour reading becomes 0 hour,
maintenance indicator (4) will light.
While displaying screen Z, when monitor display selector (2)
is pressed, the screen is returned to fuel consumption display
B. When monitor display selector (3) is pressed, screen A of
"INFO" is displayed.
Refer to page 1-31 for the resetting of oil change and filter
replacement intervals.
OPERATOR'S STATION
Axle Oil Hour
Meter
INFO
1-30
MPTC-01-019
3 2 1
Press button (3)
Remaining hours Alternate display
before replacement
is displayed.
Press button (2)
Fuel Consumption
MNSC-01-003
4
V
W
B
A