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You Are Here: Front Page » Air Compressor Parts: Belts, Filters, Regulators & More » Bostitch Air Compressor Parts & Pump Parts | mastertoolrepair.com » Stanley Bostitch Air Compressor Parts » AB-9040019 Piston Ring - Master Tool Repair

Bostitch Piston Ring AB-9040019 -

Bostitch Air Compressor Parts

Product Details
Bostitch
Brand: Bostitch
Part Number: AB-9040019

This item is contained in the following kits:

AB-9040019 - Piston Ring
Description: Only available in the C710100ConrodKit, A710100ConrodKit, A810100ConrodKit or A610101ConRodKit.

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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