Product Description
Genuine Cummins
Cummins 3925860 — Fuel Injection Pump Return Line (VE) / Fuel Drain Tube
MPN: 3925860 | Also Known As: fuel drain tube, VE injection pump return line | Supersedes: 3920888
Why This Part
- ✓ OE-formed steel line for leak-free VE pump return routing.
- ✓ Direct-fit for 1991.5–1993 5.9L 12-valve (VE rotary pump).
- ✓ Includes nut & grommet seal for a clean install.
- ✓ Built to Cummins durability standards.
OE Fit Stock Replacement 1 Per Engine
Quick Specs
| Type | Fuel injection pump return line (VE) / fuel drain tube |
|---|---|
| OE Part # | 3925860 (supersedes 3920888) |
| Includes | Line with nut & grommet seal (sealing washers sold separately) |
| Qty Required | 1 per engine (sold individually) |
Verified Fitment (Automotive)
| Year Range | Engine | Chassis |
|---|---|---|
| 1991.5–1993 | 5.9L 12-Valve (VE Rotary Injection Pump) | Dodge D/W 250 & 350 (1st Gen) |
Industrial/Off-Highway: Found in 6B5.9 fuel plumbing; always verify by ESN before ordering.
Often Paired With
- 12mm Banjo Sealing Washers: Cummins/Mopar 3963983 × 2 required (sold separately)
- Return line T-fitting (rear block tee, inspect and replace if damaged)
What’s In The Box
- (1) Genuine Cummins Fuel Injection Pump Return Line (3925860)
- Nut & grommet seal included; sealing washers sold separately.
Install Tips
- Routes from the VE pump to the rear block “T” along the tappet cover.
- Use two 12mm sealing washers (3963983) on the banjo bolt; torque to spec.
- Check for chafing/previous kinks; replace washers any time the joint is opened.
FAQ
WILL THIS FIT MY 1991.5–1993 5.9L 12-VALVE?Yes—this is the OE return line for 1st-gen 5.9L with the VE rotary injection pump.
IS THIS THE LINE FROM THE VE PUMP TO THE “T” AT THE BACK OF THE BLOCK?Correct. It’s the pump return line that routes along the tappet cover to the rear block tee.
DOES IT INCLUDE HARDWARE?Includes nut & grommet seal. You’ll need two 12mm sealing washers (3963983), sold separately.
IS THIS A GENUINE CUMMINS PART?Yes—OE Cummins 3925860 (supersedes 3920888).
WILL THIS FIT P-PUMP (’94–’98) OR 24V TRUCKS?No—this line is specific to VE-pump ’91.5–’93 trucks. Other years use different routing and parts.
Product Videos
Custom Field
Vehicle Year 1991.5,1992,1993
Vehicle Make DODGE
ENGINE 5.9L
Part Type Injection Pump Return Line
