This is Chicago Pneumatic part number R137742, which also shows up as 3310102626 cylinder, stocked at Crowder Supply as CP-R137742. It carries the piston and the port timing for the rock drill. Bore wear is gradual, so it is usually diagnosed by falling performance rather than a breakdown.
It appears on the CP 0069 Rock Drill breakdown. The tool itself is the CP 0069 Pneumatic Rock Drill. Check it against the reference number on the diagram first; serial breaks change what fits.
Need the parts around it? They are on the same breakdown, and the parts diagram hub covers every machine we publish. Stocked in Denver orders placed by 4 PM ET ship the same day when the part is on the shelf.
- Part number: R137742
- Also listed as: 3310102626
- Manufacturer: Chicago Pneumatic
- Crowder SKU: CP-R137742
- Listed on breakdowns for: CP 0069 Rock Drill
