Cummins/Onan — Connect an LPG/Propane Tank
Installation · LPG/propane fuel system
From a Cummins/Onan owner's manual covering: Onan P4500iDF, P4500iDF, P4500iDF Inverter. Check it applies to your exact model before use.
Applies to: Cummins/Onan P4500iDF, Cummins/Onan P4500iDF Inverter
Before you start
- Do not use thread seal tape or any other sealant on the LPG/propane hose connection.
- Do not start generator if you smell LPG.
Procedure
- Turn the generator OFF and place it on a flat surface in a well ventilated area.
- Verify the propane tank valve is in the fully closed position.
- Remove the cover on the generator propane inlet valve.
- Hand thread the LPG/propane hose to the propane inlet on the generator.
- Tighten the hose connector with a 19 mm or adjustable wrench; do not over-tighten.
- Remove the safety plug or cap from the propane tank valve.
- Attach the other end of the hose to the LPG/propane connector on the tank and hand tighten.
- Turn the tank valve fully open; check all connections for leaks with a soap and water solution.
Tools required
- 19 mm wrench or adjustable wrench Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Torque: 5-10 lb-ft
- Pressure at generator-mounted regulator must be 7" to 14" of water column
Full service-parts list: Cummins/Onan P4500iDF →, Cummins/Onan P4500iDF Inverter →
Source: Cummins/Onan owner's 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.