Cummins/Onan — Generator Bearing Service
Maintenance · Generator end bearing
From a Cummins/Onan service manual — check it applies to your exact model before use.
Applies to: Cummins/Onan HDKA, Cummins/Onan HDKAQ, Cummins/Onan HDKAR
Procedure
- Inspect the bearing for evidence of outer case rotation every 1000 hours of use.
- Replace the bearing every five years because bearing grease deteriorates from oxidation.
- Replace the O-ring if it shows evidence of wear or deterioration.
- Renew grease if necessary (moly only).
Specs & values
- Inspect every 1000 hours; replace bearing every five years
Full service-parts list: Cummins/Onan HDKA →, Cummins/Onan HDKAQ →, Cummins/Onan HDKAR →
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.