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Cummins · Fuel System
3936953CUM
In stock · ships from Knoxville
This is a fuel injector connector tube, also called a male connector or crossover tube, for 1998.5–2002 Dodge Ram 2500/3500 trucks with the 5.9L Cummins ISB 24-valve diesel engine equipped with a VP44 injection pump.
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Verified fitment for 2 applications
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All confirmed applications for this part number.
Ram
Ram
Also used on some industrial Cummins ISB/ISC 5.9L & 8.3L applications—verify by engine serial number (ESN) before ordering. One tube required per injector; a complete set for the 5.9L uses six tubes. Includes only the tube; installation O-rings (Cummins 3867043) must be purchased separately.
Part data verified against 4 catalog sources
Numbers this part supersedes or interchanges with. Showing 8 of 8.
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It creates a sealed high-pressure passage that feeds fuel from the injection line through the cylinder head to the injector. Over time, the sealing surfaces and O-ring grooves can wear or pit, causing hard starts, rough idle, or fuel leaks; replacement restores proper injection pressure and smooth engine operation.
Part Number: 3936953CUM
FUEL CONNECTION TUBE
Vendor: MHC Kenworth
Dealer: Knox Trailers
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