Cummins/Onan — Generator Bearing Lubrication
Maintenance
From a Cummins/Onan service manual covering: 10C, 10CW, 10CW-150R, 5CW, 5TW-0R, 6CW-54R, 7.5C, 7.5CW, 8CW. Check it applies to your exact model before use.
Applies to: Cummins/Onan 10CW, Cummins/Onan 10CW-150R
Parts for this job
- 122-37 Oil filter — Cummins/Onan 10CW Amazon eBay NAPA $17.50
- B-456 Oil filter — Cummins/Onan 10CW-150R Amazon eBay
Part numbers from the service-parts lists for Cummins/Onan 10CW, Cummins/Onan 10CW-150R. Verify against your serial number before ordering; some links are affiliate links.
Procedure
- Remove the bearing if dirt has gained entrance.
- Clean thoroughly in a good solvent, then dry.
- Fill only a 1/4-section of the bearing with lithium base grease.
- Leave no excess or reserve grease in the bearing recess or cover.
- For standard ball bearing grease, fill a 1/2-section and recess 1/2-full.
Tools required
- good solvent Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Lithium base grease MIL-G-10924
- Standard ball bearing grease
Full service-parts list: Cummins/Onan 10CW →, Cummins/Onan 10CW-150R →
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.