Ordering by number: this is H3740858 (also carried as 3310104878), the Chicago Pneumatic muffler. It silences the exhaust pulse. Once it clogs, the tool works against its own back pressure.
It appears on the CP 0012 Chipping Hammer breakdown. The tool itself is the CP 0012 Pneumatic Chipping Hammer. Pull up the diagram and confirm the reference number for your serial before ordering.
Need the parts around it? They are on the same breakdown, and the parts breakdown index covers every machine we publish. Ships from our Denver warehouse; in-stock parts ordered by 4 PM ET go out the same day.
- Part number: H3740858
- Also listed as: 3310104878
- Manufacturer: Chicago Pneumatic
- Crowder SKU: CP-H3740858
- Listed on breakdowns for: CP 0012 Chipping Hammer
