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Caterpillar 3406, 3406B, 3406C Fuel Injection Line Kit

  • Part Number: RP7900
  • OEM Number: RP7900
  • Brand: Reliance
    Brand Info x Close Reliance

    Every Reliance part is produced to exacting standards to ensure the same or better reliability as the original part. In fact, for older engines current technology is often so improved that the part we make available today may actually be better quality than the same part used to assemble the engine originally.

    New Reliance Power Parts replacement engine parts are covered for two years from date of installation. There is no limitation on the number of hours/miles of operation within the two year period. Remanufactured engine parts are covered for 1 year with no hour/mile limitation. New clutch and non-engine parts are covered for 1 year with no hour/mile limitation. Remanufactured clutch and non-engine parts are covered for 6 months with no hour/mile limitation.

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High Quality Parts
Our parts meet and exceed the OEM specifications.


For use on Caterpillar models: 3406, 3406B, 3406C, 980G, 980F, D8R, D8N, 826C, D400E

Kit contains the following items:

1 qty - #1 Fuel Line (OE # 7C3421, 4P9661, 1917941)
1 qty - #2 Fuel Line (OE # 7C3422, 4P9662, 1917942)
1 qty - #3 Fuel Line (OE # 7C3423, 4P9663, 1917943)
1 qty - #4 Fuel Line (OE # 7C3424, 4P9664, 1917944)
1 qty - #5 Fuel Line (OE # 7C3425, 4P9665, 1917945)
1 qty - #6 Fuel Line (OE # 7C3426, 4P9666, 1917946)
20 qty - Non-Threaded Clamp (OE # 1W9168)
8 qty - Threaded Clamp (OE # 1W9169)

If you are unsure if this Fuel Injection Line Kit will work for your application, please give us a call with your engine serial number and we would be happy to assist.

Please note: This kit will not work on 3406E engines.

This kit does not include clamp # 1W9167. Most engines use a total of 3 of this particular clamp. You will most likely be able to clean and reuse your original. For reference, here is a photo of the clamp that is NOT included: