Cummins/Onan — Routing Fuel Lines
Installation
From a Cummins/Onan service manual covering: 5.5 HGJAA, 5.5 HGJAB, 6.5 HGJAA, 6.5 HGJAB, 7.0 HGJAA, 7.0 HGJAB. Check it applies to your exact model before use.
Applies to: Cummins/Onan HGJAA, Cummins/Onan HGJAB
Before you start
- Electric arcs can ignite gasoline leading to severe personal injury or death. Do not run wiring and fuel lines together.
Procedure
- Route the fuel line along bulkheads and frame members such that it is protected; the entire length must be visible and accessible.
- Support and protect fuel lines to restrain movement and prevent chaffing or contact with sharp edges, electrical wiring, and hot exhaust parts.
- Use caution with P clamps and wire ties; do not over tighten. Make large radius bends around corners to avoid kinks.
Specs & values
- Use 1/4 inch I.D. welded and drawn Type 304L stainless or AISI 1008-1010 low carbon steel tubing, 0.028 inch minimum wall
- Tubing must meet 150 psi operating pressure (ASTM A 539-99)
- Form tubing ends into SAE J1231 Type 1 or Type 3 double-flare hose beads
Full service-parts list: Cummins/Onan HGJAA →, Cummins/Onan HGJAB →
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.