Komatsu PC220LC -8 Operation & Maintenance Manual page 317

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 3-119)".
8. Install the undercover.
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MAINTENANCE MAINTENANCE