Komatsu D61EX-24 Operation & Maintenance Manual page 209

MACHINE OPERATIONS AND CONTROLS
2)
Take the end of hose (2) out of the inspection window.
3)
Loosen drain plug (P) to drain excess oil.
When draining the engine oil, put a container to catch
the oil under hose (2).
4)
Check the oil level again.
6.
After the oil is adjusted to a proper level, insert dipstick (G)
fully into the dipstick pipe again.
7.
Tighten the cap of oil filler port (F) securely.
8.
Close the engine side cover.
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OPERATION