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Caterpillar · Engine
9X7317
In stock · ships from Knoxville
This is a small Viton O-ring seal used to seal the fuel injector in certain Caterpillar diesel engines, primarily the 3406E and C15 Acert models.
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Verified fitment for 2 applications
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All confirmed applications for this part number.
Caterpillar
Caterpillar
Injector seal ring commonly used on engines with prefix 2WS, BXS, MXS. Always verify fitment by Engine Serial Number (ESN) before ordering.
Part data verified against 5 catalog sources
Numbers this part supersedes or interchanges with. Showing 3 of 3.
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It prevents high-pressure fuel or combustion gases from leaking past the injector, helping to maintain proper engine performance and prevent fuel dilution in the oil. Replacement is recommended whenever the injector is removed or if symptoms like hard starting, rough idle, or fuel in the oil appear. Although identified as a Caterpillar part, it crosses to several aftermarket and OEM numbers like 6I1420 and M-9X7317.
Part Number: 9X7317
SEAL O-RING
Vendor: STOWERS MACHINERY
Dealer: KP Services Crossville
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