Cummins/Onan — Checking Engine Oil Level
Maintenance · Engine lubrication system
From a Cummins/Onan service manual — check it applies to your exact model before use.
Applies to: Cummins/Onan HDKB
Before you start
- Crankcase pressure can blow hot engine oil out the fill opening causing severe burns. Always stop the genset before removing the oil fill plug or drain.
Procedure
- Park vehicle on level ground and shut off genset before checking oil level.
- Open Oil Fill Access Cover; twist dipstick cap about 1/4 turn counterclockwise and pull dipstick out.
- Wipe off dipstick, insert back into Oil Fill Tube, remove again and check oil level.
- Add or drain oil as necessary; keep level between the high and low beads on the dipstick.
- Approximately 1 pint (0.4 liter) can be added if oil level is at the lower bead.
- Insert dipstick, twist cap clockwise to secure, close and latch the Oil Fill Access Cover.
Specs & values
- Keep the oil level between the high and low beads on the dipstick
- Approximately 1 pint (0.4 liter) can be added if the oil level is at the lower bead
Full service-parts list: Cummins/Onan HDKB →
Source: Cummins/Onan service 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.