Komatsu PC138USLC Operation & Maintenance Manual page 172

OPERATION
Check Oil Level in Engine Oil Pan, Add Oil
Parts and oil are at high temperature immediately after the engine is stopped and may cause serious burns. Wait for the oil
temperature to go down before performing this operation.
1. Open engine hood.
2. Remove dipstick (G) and wipe the oil off with a cloth.
3. Fully insert dipstick (G) into filler pipe (F), then remove it.
4. The oil level should be between the H and L marks on dipstick
(G).
If the oil level is below the L mark, add oil through oil filler (F).
5. If the oil lever is above the H mark, remove undercover (1),
drain the excess engine oil from drain valve (P), then check the
oil level again.
6. If the oil level is correct, tighten the oil filler cap securely and
close the engine hood.
REMARK
If the machine is at an angle, reposition it to level before checking.
When checking the oil level after the engine has been operated, allow the engine to cool for 15 minutes before
checking.
MACHINE OPERATIONS AND CONTROLS
WARNING
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