Ordering by number: this is F826979, which also shows up as 3310104491, the Chicago Pneumatic washer. This distributes bolt load across the joint face on the rock drill. Flattened or dished washers are replaced during reassembly.
Crowder’s breakdowns list this part on the CP 9 9S Rock Drill and CP 4121 Chipping Hammer, and on 3 other machines. Pull up the diagram and confirm the reference number for your serial before ordering.
Everything else on that machine is one page away on the parts diagram library; complete tools are on the CP tool catalog. Denver stock, with same-day shipment on in-stock orders in by 4 PM ET.
- Part number: F826979
- Also listed as: 3310104491
- Manufacturer: Chicago Pneumatic
- Crowder SKU: CP-F826979
- Listed on breakdowns for: CP 9 9S Rock Drill, CP 4121 Chipping Hammer, CP 0017 SVR Chipping Hammer, CP 1210 1210S 1210SVR Paving Breaker, CP 0014 RR RRBS Rock Drill
