Komatsu ecot3 Operation And Maintenance Manual page 121

DETAILED CONTROLS AND GAUGES DETAILED CONTROLS AND GAUGES
2. Select "Clock Adjustment" on the user menu, then press switch
F6. The screen switches to the time adjustment selection
menu screen.
The following 3 items can be changed.
(a) Clock setting
(b) 12/24 hour display mode
(c) Daylight saving time
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OPERATION OPERATION