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PAI Industries · Air System
645051
In stock · ships from Knoxville
This is a fuel check valve designed for Detroit Diesel Series 60 engines.
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Other applications
Primarily verified for Detroit Diesel Series 60 engines. The part may be found in various truck makes that use this engine, including Freightliner Century Class, Columbia, Coronado; Peterbilt 379, 386, 387, 389; Kenworth T600, T660, T800, W900; and others. Always verify fitment with your specific engine serial number (ESN) or VIN before ordering, as multiple fuel pump configurations exist.
Part data verified against 4 catalog sources
Numbers this part supersedes or interchanges with. Showing 4 of 4.
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It is installed in the fuel return line and prevents fuel from draining out of the cylinder head back to the tank when the engine is shut off. When this valve fails or leaks, it can cause extended cranking and hard starts, especially after the truck sits overnight, because the fuel system loses its prime. Replacing a faulty check valve restores proper fuel prime and ensures quick, reliable starts.
Part Number: 645051
CHECK VALVE
Unit: ea
Dealer: KP Services Crossville
Compatibility, alternatives, and more
Parts commonly needed alongside air system
