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Detroit Diesel · Engine
A4721870980
In stock · ships from Knoxville
This rectangular sealing ring (often called an O-ring) seals oil pressure lines, sump connections, or pressure pipes on Detroit Diesel 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.
Freightliner
Other applications
Freightliner
Other applications
Fitment data from a single aftermarket catalog; this seal may fit additional Detroit Diesel engine models and model years. Always confirm by engine serial number or part reference before ordering.
Part data verified against 4 catalog sources
Numbers this part supersedes or interchanges with. Showing 9 of 9.
Different year, make, or config? Get a confirmation against your truck in under a minute.
It is made from fluorocarbon elastomer (Viton), which resists high heat and oil better than standard rubber, providing a durable, leak-free seal. If you notice oil weeping around the pressure line fittings or are doing preventive maintenance, replacing this ring helps avoid larger engine oil leaks.
Part Number: A4721870980
ORING
Dealer: KP Services Crossville
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