Cummins/Onan — Fuel Tank Removal
Repair & overhaul
From a Cummins/Onan service manual covering: P4500, P5000E, P5000e. Check it applies to your exact model before use.
Applies to: Cummins/Onan P4500
Before you start
- Gasoline is highly flammable and explosive. Drain the fuel tank and fuel line before disassembly. Wipe up any spilled fuel immediately.
Procedure
- Make sure the generator set is turned off and disconnect the spark plug wire.
- Drain the fuel from the fuel tank.
- Close the fuel check valve.
- Press the hose barb connecting the fuel line to the fuel check valve and remove the fuel line.
- Remove the four bolts and flat washers on the four corners of the fuel tank.
- Remove the brace above the recoil by removing the two bolts.
- Slide the fuel tank out of the recoil side of the frame.
Full service-parts list: Cummins/Onan P4500 →
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.