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PAI Industries · Engine
645053
In stock · ships from Knoxville
This is a fuel pump check valve designed for Detroit Diesel Series 60 engines.
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Verified fitment for 2 applications
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All confirmed applications for this part number.
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Series 60 fuel pumps used multiple check-valve configurations. This is the 0.25 in I.D. M14 x 1.5 / 5/8-18 variant; the 0.20 in I.D. valve (Detroit 23516919, PAI 645051) is a different part. Verify the part number etched on your existing valve before ordering.
Part data verified against 5 catalog sources
Numbers this part supersedes or interchanges with. Showing 4 of 4.
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Its job is to prevent fuel from draining back to the tank when the engine is shut off, which keeps the fuel pump primed for faster restarts and protects it from dry starts. Over time, a failing check valve can cause extended cranking or hard starting, and this part is a direct replacement to restore proper fuel system pressure. Note that Series 60 fuel pumps used different check-valve configurations, so it's important to match your existing valve's dimensions and part number before ordering.
Part Number: 645053
DETROIT CHECK VALVE 645053 23535129
Vendor: PAI Industries
Dealer: KP Services Crossville
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