O-Ring is the Chicago Pneumatic service part carried under part number A043001. 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 appears on the CP 0066 Concrete Scabbler breakdown. That machine is the CP 0066 Non Sparking Scabbler if you are pricing a replacement rather than a repair.
Need the parts around it? They are on the same breakdown, and the parts breakdown index covers every machine we publish. Denver stock, with same-day shipment on in-stock orders in by 4 PM ET.
- Part number: A043001
- Manufacturer: Chicago Pneumatic
- Crowder SKU: CP-A043001
- Listed on breakdowns for: CP 0066 Concrete Scabbler

