O-Ring is the Atlas Copco service part carried under part number 0663211200. Its job is to hold the pressure boundary between two mating faces; a hardened or nicked seal shows up as lost power and a damp housing well before anything else fails.
It is called out in the parts diagram for the BBD 94W 94WS 94WE Rock Drill and BBC 34DSI Rock Drill, and on 3 other machines. Check it against the reference number on the diagram first; serial breaks change what fits.
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. Stocked in Denver orders placed by 4 PM ET ship the same day when the part is on the shelf.
- Part number: 0663211200
- Manufacturer: Atlas Copco
- Crowder SKU: AC-0663211200
- Listed on breakdowns for: BBD 94W 94WS 94WE Rock Drill, BBC 34DSI Rock Drill, BBC 16W WS Pusher Leg Drill, BBC 34W WS Pusher Leg Drill, BBD 46 WS/WR Rock Drill
