This is Chicago Pneumatic part number H0310447, also listed as 3310104728 O-Ring, stocked at Crowder Supply as CP-H0310447. It seals a pressure joint inside the breaker, and because elastomer takes a set long before the metal around it wears, it is one of the first items to replace when a machine starts weeping air or oil.
It shows up in the parts breakdown for the CP 1210 1210S 1210SVR Paving Breaker. Check it against the reference number on the diagram first; serial breaks change what fits.
Use the parts diagram hub to work through the rest of the assembly, or the CP tool catalog if you are pricing a replacement machine. It ships out of Denver, same day on in-stock orders placed before 4 PM ET.
- Part number: H0310447
- Also listed as: 3310104728
- Manufacturer: Chicago Pneumatic
- Crowder SKU: CP-H0310447
- Listed on breakdowns for: CP 1210 1210S 1210SVR Paving Breaker
