Cummins/Onan — Flywheel Removal
Repair & overhaul
From a Cummins/Onan service manual — check it applies to your exact model before use.
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Procedure
- Loosen the flywheel capscrew and back it out several turns.
- Attach the puller tool to the flywheel with jack screws in the tapped holes.
- Tighten the puller center screw until the flywheel comes loose.
- Remove the puller, flywheel center screw and washer.
- Inspect the flywheel and replace it if any air vanes are missing.
Tools required
- Flywheel puller Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Flywheel Mounting Screw torque 50-55 ft-lbs (68-75 N-m)
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.