Komatsu GD555-5 Operation & Maintenance Manual page 297

SERVICE PROCEDURE SERVICE PROCEDURE
7. If the oil level is correct, insert dipstick (G) in the oil filler pipe,
then install the oil filler cap.
On each surface of dipstick (G), the oil level for the time (A)
when the engine is stopping (ENG STOP) or (B) when the
engine is running at idle (ENG IDOLING) is stamped.
Use the stamps indicated in (A) for the engine stopped (ENG
STOP).
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MAINTENANCE MAINTENANCE