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Craftsman Compression Ring CAC-248-2 $7.39

Craftsman Oil Free Pump Parts

Product Details
CAC-248-2 - Compression Ring
Craftsman
Brand: Craftsman
Part Number: CAC-248-2

Description: Note: recommend ordering kit K-0650. This kit includes a comp ring, seal and a new cylinder sleeve which should be replaced over time if scratched or damaged. Replacing the comp ring only may not fix the unit.

The piston rings provide compression in an air compressor pump by providing the seal in between the cylinder wall and the piston. In an oil-bath pump, there are usually two compression rings and one oil (scraper) ring to keep oil from passing the piston and into the head. In an oil-free pump, the piston is Teflon-coated and doesn’t require lubrication. If your pump is pulling oil into the head or if compression is very low (oil-bath pumps), replace the rings. If your pump isn’t pressurizing or if the piston ring is damaged along the outer perimeter (oil-free pumps), replace it. Also replace the cylinder sleeve when replacing the compression ring (oil-free pumps).



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