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Detroit Diesel · Hardware & Fasteners
A4721870880
In stock · ships from Knoxville
This is an oil pickup tube seal (often called an O-ring despite its rectangular profile) for Detroit DD13 and DD15 engines.
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Verified fitment for 9 applications
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Two seals are required per engine. Always verify engine serial number before ordering, as fitment is specific to DD13 and DD15 platform oil pump configurations.
Part data verified against 5 catalog sources
Numbers this part supersedes or interchanges with. Showing 9 of 9.
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It sits between the oil pickup tube and the oil pump assembly inside the crankcase, ensuring a leak-free connection so the pump draws oil instead of air. If this seal hardens or fails, the engine can lose oil pressure, which is why it’s commonly replaced during oil pump service or when low oil pressure symptoms appear. Two of these seals are required per engine—always check your engine serial number before ordering.
Part Number: A4721870880
ORING
Dealer: Knox Trailers
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