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Cummins · Hardware & Fasteners
4934278
In stock · ships from Knoxville
The Cummins Sealing Washer 4934278 is a genuine Cummins part used primarily on EPA13 Automotive 6.7-liter Cummins ISB and QSB 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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This part is an engine sealing washer, not a brake component. The inventory listing under 'Brakes & Wheel End' appears to be a misclassification. It is intended for Cummins 6.7L engines common in Dodge Ram trucks and medium-duty commercial vehicles.
Part data verified against 5 catalog sources
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It is a sealing washer designed to prevent leaks at high-pressure connections such as fuel injector lines, oil fittings, or coolant passages. Over time, these washers can harden or crack, causing fluid leaks. Replacing them during injector or fuel system service ensures a reliable seal and prevents engine damage from fluid loss.
Part Number: 4934278
WASHER SEAL
Vendor: MHC Kenworth
Dealer: KP Services Crossville
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