O-ring, American Pneumatic Tool part number 1280582637, which replaced the older number 01786, listed at Crowder Supply as APT1786. It keeps air or oil where it belongs inside the rock drill. Once it flattens or hardens, the machine loses pressure across the joint and performance falls off gradually rather than all at once.
Crowder’s breakdowns list this part on the 115 Rock Drill and 131 Backfill Tamper, and on 5 other machines. Pull up the diagram and confirm the reference number for your serial before ordering.
Use the parts diagram library to work through the rest of the assembly, or the APT lineup if you are pricing a replacement machine. Stocked in Denver orders placed by 4 PM ET ship the same day when the part is on the shelf.
- Part number: 1280582637
- Previous part number: 01786
- Manufacturer: American Pneumatic Tool
- Crowder SKU: APT1786
- Listed on breakdowns for: 115 Rock Drill, 131 Backfill Tamper, CP 1260SPDR Spike Driver, 119 Trench Digger, 133-T/1133-T Rivet Buster, 133-ST/1133-ST Rivet Buster, +1 more
