Komatsu Galeo PC27MR-2 Operation & Maintence Manual page 60

OPERATION
DETAILED CONTROLS AND GAUGES
Service Meter
This meter (3) shows the total time that the machine has been
operated.
Use this display to manage the specified service intervals.
If the engine is running, the service meter advances even if the
machine is not being operated.
The meter advances 0.1 for every 1/10 hours (6 minutes) of engine
operation, regardless of the engine speed.
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