Image is for illustration purposes only. Actual part may vary.

7C1728

CAT REAR MAIN

This is a rear crankshaft seal for Caterpillar C10, C12, C13, and related engine models. 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.