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Detroit Diesel · Filtration
A0039811385
In stock · ships from Knoxville
This is a check ball for the fuel filter housing on Detroit Diesel and Mercedes-Benz heavy-duty engines.
Confirm the part fits before you buy. Applications and interchange numbers are researched and audited per part.
Verified fitment for 2 applications
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All confirmed applications for this part number.
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Verify your engine's fuel filter housing part number matches CL5 CLR (e.g., A4710100005) or refer to the engine serial number for correct application.
Part data verified against 2 catalog sources
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It acts as a one-way valve within the fuel filter module, allowing fuel to flow in the correct direction and preventing drain-back to maintain prime. The ball can wear or become stuck over time, leading to hard starting or fuel delivery issues; it is commonly replaced during fuel filter housing service or rebuild. Specifically, it fits the CL5 CLR filter housing used on Gen1 HDEP EPA10 engines (Detroit DD13, DD15, DD16) and corresponding Mercedes-Benz models. [duallane.com](https://www.duallane.com/shop-parts/filtration/fuel-filters/fuel-filter-service-parts)
Part Number: A0039811385
CHECK BALL FOR FILTER HOUSING
Vendor: Velocity
Dealer: Knox Trailers
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