Cummins Crankshaft Oil Seal 3006738

Cummins Crankshaft Rear Oil Seal 3006738

The crankshaft oil seal, also known as the front crankshaft seal or front main seal, is a vital component in an internal combustion engine. Here are key points about the crankshaft oil seal:

1. Location: The crankshaft oil seal is typically located at the front of the engine, where the crankshaft extends out of the engine block and connects to the accessory drive (such as the pulleys and belts).

2. Functionality: The primary function of the crankshaft oil seal is to prevent engine oil from leaking out of the engine and to keep contaminants from entering the engine. It seals the gap between the stationary engine block and the rotating crankshaft.

3. Material: Crankshaft oil seals are commonly made of rubber or a rubber-like material that provides flexibility and a secure seal. The outer edge often has a metal or reinforced material for durability.

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