Cummins/Onan — Separate Gasoline Fuel Pickup Tube Installation
Installation · Fuel system
From a Cummins/Onan service manual covering: 3.3 KY, 3.3KY, 3.6 KY, 3.6KY, 4KY. Check it applies to your exact model before use.
Applies to: Cummins/Onan 3.6 KY, Cummins/Onan 3.6KY, Cummins/Onan 4KY
Before you start
- Excessive fuel pressure can flood genset causing fire
- Sparks can ignite gasoline
Procedure
- Contact vehicle chassis manufacturer regarding second fuel pickup installation.
- Do not change fuel fill tube, fill limiter vent, vapor canister, vapor lines, filler cap or fuel system without approval.
- Terminate genset pickup above vehicle pickup to prevent running vehicle out of fuel.
- Use 1/4 inch I.D. fuel hose (SAE 30-R7) and stainless steel hose clamps for connection.
- Run fuel line at or above top of fuel tank; maximum fuel pump lift 36 inches (914 mm).
- Route fuel lines away from electrical wiring and hot exhaust components.
Tools required
- stainless steel hose clamps Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- 1/4 inch I.D. fuel hose (SAE 30-R7)
- maximum fuel pump lift 36 inches (914 mm)
- fuel pressure at genset connection must not exceed 1-1/2 psi
Full service-parts list: Cummins/Onan 3.6 KY →
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.