Cummins/Onan — AC Generator Inspection
Maintenance
From a Cummins/Onan operator's manual — check it applies to your exact model before use.
Applies to: Cummins/Onan DGAB, Cummins/Onan DGAC, Cummins/Onan DGAD, Cummins/Onan DGAE, Cummins/Onan 4A2.3 engine, Cummins/Onan 6A3.4 engine, Cummins/Onan 6AT3.4 engine
Before you start
- Excessive foreign matter on diodes and heat sinks will cause overheating and possible failure.
Procedure
- Remove generator output box cover.
- Inspect rotating rectifier assembly to make sure diodes are free of dust, dirt, and grease.
- Blow out assembly periodically with filtered low pressure air.
Full service-parts list: Cummins/Onan DGAB →, Cummins/Onan DGAC →, Cummins/Onan DGAD →, Cummins/Onan DGAE →
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.