Cummins/Onan — Checking Oil Level
Maintenance · Lubrication system
From a Cummins/Onan operator's manual — check it applies to your exact model before use.
Applies to: Cummins/Onan HDKC
Before you start
- Crankcase pressure can blow hot engine oil out the fill opening; always stop the generator set before removing the oil fill cap
Procedure
- Park the vehicle on level ground and stop the generator set.
- Pull out the dipstick.
- Wipe off the dipstick and reinsert it.
- Pull it out again to check oil level.
- Add or drain oil as necessary; keep the oil level between the full and add marks.
- Insert the dipstick and secure the oil fill cap.
Specs & values
- Keep the oil level between the high and low beads (or markings) on the dipstick
Full service-parts list: Cummins/Onan HDKC →
Source: Cummins/Onan operator's manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.