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Hitachi Expander Ring

Hitachi Pump Parts

Product Details
Hitachi
Brand: Hitachi
Description:

Only available in Valve Plate Kit # 724152.

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).


 

This item fits the following models:

Air Compressor Pump Parts - EC25E, EC25G

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