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Caterpillar · Engine
7C1728
In stock · ships from Knoxville
This is a rear crankshaft seal for Caterpillar C10, C12, C13, and related engine models.
Confirm the part fits before you buy. Applications and interchange numbers are researched and audited per part.
Verified fitment for 5 applications
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All confirmed applications for this part number.
Caterpillar
Caterpillar
Primarily fits CAT C10, C12, and C13 series engines. Verify by Engine Serial Number (ESN) prefix.
Part data verified against 5 catalog sources
Different year, make, or config? Get a confirmation against your truck in under a minute.
It fits at the back of the engine block where the crankshaft exits to connect to the transmission, preventing engine oil from leaking out of the rear main bearing area. This seal is typically replaced during major engine overhauls, clutch replacements, or whenever a visible oil leak is detected at the bellhousing, which can contaminate the clutch and cause slippage. Made as a high-quality aftermarket part, it offers a reliable seal to protect your engine and surrounding components.
Part Number: 7C1728
CAT REAR MAIN
Vendor: THE DIESEL STORE (TAYLOR DIESEL)
Dealer: KP Services Crossville
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