Description
Used genuine Cummins OEM injector fuel supply tube (part 3685809) for ISX15 high-pressure common-rail engines, pulled from a 2015 ISX15 400ST (service model CM2350 X101) core. The tube routes high-pressure diesel from the common rail to the injectors and is one of the matched pair (companion 3685810) servicing cylinders 4 and 5 in this engine family.
Specifications
| Manufacturer | Cummins (Genuine OEM) |
|---|---|
| Part Number | 3685809 |
| Part Type | Injector Fuel Supply Tube (high-pressure) |
| Engine | Cummins ISX15 |
| Marketing Model | ISX15 400ST |
| Service Model | CM2350 X101 |
| Source Build Date | 2015 |
| Condition | Used (sold as-is) |
| Companion Tube | 3685810 (alternate cylinder bank) |
Cross References
This injector fuel supply tube is identified by the following part number:
- Cummins: 3685809
- Aftermarket: TamerX 3685809 (new aftermarket replacement, listed for reference)
Applications
This fuel supply tube fits the following engine:
- Cummins ISX15 15.0L (CM2350 X101 service model)
Representative vehicles using this engine:
- Kenworth T660, T680, T800, T880, W900 (2010+)
- Peterbilt 386, 389, 567, 579, 587 (2010+)
- Freightliner Cascadia, Coronado (2010–2017)
- International ProStar, LoneStar (with optional ISX15)
- Volvo VNL/VNM (with optional ISX15)
Used parts are sold as-is. Inspect the tube for cracks, thread damage, or chafing and pressure-test before installation. Verify the OEM number on your old tube — companion 3685810 is required if the failure is on the opposite bank.
