O-ring carries Texas Pneumatic part number TX4B490 and is stocked here under TP-TX4B490. This is a sealing component it holds pressure at the joint and is a routine replacement whenever the assembly is opened.
Crowder’s breakdowns list this part on the TX CH-4B 4-Bolt Chipping Hammer.
Use the parts diagram library to work through the rest of the assembly, or the Texas Pneumatic tool range 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: TX4B490
- Manufacturer: Texas Pneumatic
- Crowder SKU: TP-TX4B490
- Listed on breakdowns for: TX CH-4B 4-Bolt Chipping Hammer

