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Caterpillar · Hardware & Fasteners
4640509
In stock · ships from Knoxville
This is a Caterpillar O-ring seal (part number 4640509) made of FKM (Viton) material.
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Caterpillar
Caterpillar
Used across a broad range of Caterpillar engines; not limited to a single truck model. Verify your engine's specific serial number to ensure correct fitment.
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It is a dash size 012 O-ring with a 9.25 mm inside diameter and 1.78 mm cross-section, engineered for high-temperature sealing applications. Commonly used in various Caterpillar diesel engines to seal fluids and gases against air, fuels, lubricants, and hydraulic fluids. Over time, O-rings can harden, crack, or lose elasticity, leading to leaks—replace it when you notice oil or fuel seepage at the joint.
Part Number: 4640509
O-RING
Vendor: STOWERS MACHINERY
Dealer: Knox Trailers
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