Komatsu ecot3 Operation And Maintenance Manual page 319

MAINTENANCE PROCEDURE MAINTENANCE PROCEDURE
6. After replacing the filter cartridge, open the engine hood and
add engine oil through oil filler (F) to between the H and L
marks on dipstick (G).
7. Run the engine at idle for a short time, then stop the engine,
and check that the oil level is between the H and L marks on the
dipstick. For details, see "Check Oil Level in Engine Oil Pan,
Add Oil (PAGE 3-120)".
8. Install the undercover.
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MAINTENANCE MAINTENANCE