O-Ring, Chicago Pneumatic part number C100569, listed at Crowder Supply as CP-C100569. It keeps air or oil where it belongs inside the chipping hammer. Once it flattens or hardens, the machine loses pressure across the joint and performance falls off gradually rather than all at once.
The published breakdown lists it on the CP 4120 Chipping Hammer. 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 parts breakdown index; complete tools are on the Chicago Pneumatic lineup. Ships from our Denver warehouse; in-stock parts ordered by 4 PM ET go out the same day.
- Part number: C100569
- Manufacturer: Chicago Pneumatic
- Crowder SKU: CP-C100569
- Listed on breakdowns for: CP 4120 Chipping Hammer
