Striking Piston, Atlas Copco part number 3371817104, listed at Crowder Supply as AC-3371817104. This part holds and guides the steel. Elongation of the shank bore is the usual reason for replacement, well before any crack appears.
It is called out in the parts diagram for the RDR 48M Rock Drill and LHD 23M Hydraulic Rock Drill, and on 1 other machine. 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 full diagram library has the full breakdown library, and the Atlas Copco lineup 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: 3371817104
- Manufacturer: Atlas Copco
- Crowder SKU: AC-3371817104
- Listed on breakdowns for: RDR 48M Rock Drill, LHD 23M Hydraulic Rock Drill, RDR 48R Rock Drill

