Generac — Flywheel Assembly and Rear Oil Seal Carrier Removal and Installation
Repair & overhaul
From a Generac service manual covering: CAC478, CAC480, SQR480. Check it applies to your exact model before use.
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Procedure
- Remove six M10 bolts (replace them).
- Remove the flywheel and check clutch plate surface and ring gear teeth.
- Installation: press the gear ring on when heated to 300°C; press fit clearance 0.48—0.86mm.
- Align the installation mark hole and fabrication hole on the crankshaft.
- Screw in 6 new bolts by hand with sealant applied.
- Tighten flywheel bolts to 82—92Nm.
- Rear oil seal carrier: remove 4 bolts and take out the carrier assembly.
- Remove the carrier sealing gasket; pry out the rear oil seal without damaging the carrier.
- Press a new oil seal into the carrier with the part number side outward (interference 0.26—0.50mm).
- Install a new sealing gasket and install the rear oil seal carrier assembly.
- Tighten the four M6 bolts to 8.0—11.0Nm.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Flywheel bolts: 82—92Nm
- Rear oil seal carrier M6 bolts: 8.0—11.0Nm
Source: Generac 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.