This is the Atlas Copco valve pin part number 3121057400, Crowder SKU AC-3121057400. It directs the flow that reverses the piston in the rock drill. Valve wear changes port timing, and the machine loses blow rate before it loses the ability to run.
You will find it on the diagram for the BBD 94W 94WS 94WE Rock Drill. Compare it to the reference callout on the diagram to be sure it is the position you need.
Use the parts diagram library to work through the rest of the assembly, or the Atlas Copco lineup if you are pricing a replacement machine. Denver stock, with same-day shipment on in-stock orders in by 4 PM ET.
- Part number: 3121057400
- Manufacturer: Atlas Copco
- Crowder SKU: AC-3121057400
- Listed on breakdowns for: BBD 94W 94WS 94WE Rock Drill
