Cummins/Onan — Flex Disk and Ring Gear Inspection
Maintenance · Flex disk and ring gear assembly
From a Cummins/Onan service manual — check it applies to your exact model before use.
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Before you start
- Flex disk and ring gear assembly must be inspected for cracks every time removed.
Procedure
- Clean flywheel with solvent and dry with compressed air.
- Remove keeper bar from magnetic poles.
- Place magnet on areas being inspected.
- Spray moderate amount of powder on area to be checked.
- If cracks found in bolt circle front or rear flanges, replace assembly.
- Wipe assembly clean.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
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.