Cummins/Onan — Check the engine oil level
Maintenance · Engine oil / dipstick
From a Cummins/Onan operator's manual covering: C20 N6, C22 N6, C25 N6, C30 N6, C30 N6H, C36 N6, C36 N6H, C40 N6, C40 N6H, C45 N6H, C50 N6H, C60 N6H. Check it applies to your exact model before use.
Applies to: Cummins/Onan C20 N6, Cummins/Onan C22 N6, Cummins/Onan C25 N6, Cummins/Onan C30 N6, Cummins/Onan C36 N6, Cummins/Onan C40 N6, Cummins/Onan C45 N6H, Cummins/Onan C50 N6H, Cummins/Onan C60 N6H
Before you start
- Crankcase pressure can blow out hot oil and cause severe burns. Do NOT check oil while the engine is operating.
Procedure
- Pull out the dipstick and wipe it clean.
- Clean off the area surrounding the dipstick port to prevent entry of debris into the oil pan.
- Make sure that the engine has not been running for approximately five minutes.
- Reinsert and fully seat the dipstick.
- Remove the dipstick and check the oil level.
- Reinsert and fully seat the dipstick.
Specs & values
- Oil level should be between the High (4.3 L or 4.5 qt) and Low (3.8 L or 4.0 qt) marks
Full service-parts list: Cummins/Onan C20 N6 →, Cummins/Onan C22 N6 →, Cummins/Onan C25 N6 →, Cummins/Onan C30 N6 →, Cummins/Onan C36 N6 →, Cummins/Onan C40 N6 →, Cummins/Onan C45 N6H →, Cummins/Onan C50 N6H →, Cummins/Onan C60 N6H →
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.