Ordering by number: this is 0663612900, the Atlas Copco O-Ring. It seals a pressure joint inside the breaker, and because elastomer takes a set long before the metal around it wears, it is one of the first items to replace when a machine starts weeping air or oil.
The published breakdown lists it on the Red Hawk Gas Breaker/Drill and Cobra Combi Gas Drill/Breaker, and on 3 other machines. Compare it to the reference callout on the diagram to be sure it is the position you need.
If you need the parts around it, the parts diagram hub has the full breakdown library, and the Atlas Copco catalog covers the machines themselves. Denver stock, with same-day shipment on in-stock orders in by 4 PM ET.
- Part number: 0663612900
- Manufacturer: Atlas Copco
- Crowder SKU: AC-0663612900
- Listed on breakdowns for: Red Hawk Gas Breaker/Drill, Cobra Combi Gas Drill/Breaker, BBC 34DSI Rock Drill, BBC 16W WS Pusher Leg Drill, BBC 34W WS Pusher Leg Drill
