Valve Pin, Atlas Copco part number 3131000800, listed at Crowder Supply as AC-3131000800. This part controls the working cycle of the rock drill. When its faces wear, the tool sounds different and the blow rate falls off usually the first thing checked on a slow machine.
It is called out in the parts diagram for the BBD 46 WS/WR Rock Drill. Check it against the reference number on the diagram first; serial breaks change what fits.
Everything else on that machine is one page away on the full diagram library; complete tools are on the Atlas Copco lineup. Ships from our Denver warehouse; in-stock parts ordered by 4 PM ET go out the same day.
- Part number: 3131000800
- Manufacturer: Atlas Copco
- Crowder SKU: AC-3131000800
- Listed on breakdowns for: BBD 46 WS/WR Rock Drill

