Cummins/Onan A15 — Removing and Disassembling the Generator
Repair & overhaul
For the Cummins/Onan A15, from the Cummins/Onan service manual.
Applies to: Cummins/Onan DGBB, Cummins/Onan DGBC, Cummins/Onan DGCA, Cummins/Onan DGCB, Cummins/Onan DGCC, Cummins/Onan DGDA, Cummins/Onan DGDB, Cummins/Onan DGEA, Cummins/Onan DGFA, Cummins/Onan DGFB, Cummins/Onan B and C Series diesel engine
Before you start
- Accidentally dropping the generator can damage it and cause severe personal injury and death.
Procedure
- Disconnect starting battery cables (negative first).
- Disconnect line cables, remote control wiring, engine wiring harness, and control leads (mark all for reconnection).
- Attach hoist to generator output box, loosen mounting bolts, remove box.
- Bar engine until one rotor pole points straight down.
- Attach lifting eyes and hoist, remove two through bolts securing generator to isolation mounts.
- Raise generator end approximately 1 inch (12 mm), block engine under flywheel housing.
- Remove bolts securing generator drive discs to flywheel.
- Loosen adapter casting bolts, carry full weight on hoist, remove bolts, pull generator away.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Full service-parts list: Cummins/Onan DGBB →, Cummins/Onan DGBC →, Cummins/Onan DGCA →, Cummins/Onan DGCB →, Cummins/Onan DGCC →, Cummins/Onan DGDA →, Cummins/Onan DGDB →, Cummins/Onan DGEA →, Cummins/Onan DGFA →, Cummins/Onan DGFB →
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.