Cummins/Onan — Compartment Mount Exhaust System Disassembly
Repair & overhaul
From a Cummins/Onan service manual — check it applies to your exact model before use.
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Before you start
- Exhaust gas can cause severe personal injury or death; install all gaskets and hardware as specified.
Procedure
- Loosen the front muffler clamp, muffler strap, and tailpipe hanger; remove muffler and tailpipe.
- Remove the screws securing the exhaust tube to the exhaust manifold; remove tube and gasket.
- Remove the cooling system noise shield and scroll to access the exhaust manifold.
- Remove the screw securing the manifold outlet flange to the support bracket.
- Remove the four exhaust manifold screws; lift off manifold and two manifold gaskets.
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.