This is Chicago Pneumatic part number P073120, which also shows up as 3310103856 dowel pin, stocked at Crowder Supply as CP-P073120. It pins its assembly together. Vibration is what kills them, so they are cheap insurance during any teardown of the tamper.
It appears on the CP 0003 Backfill Tamper breakdown. The tool itself is the CP 0003 Pneumatic Backfill Tamper. Pull up the diagram and confirm the reference number for your serial before ordering.
Work through the rest of the assembly on the same breakdown, or start over from the parts diagram hub. Denver stock, with same-day shipment on in-stock orders in by 4 PM ET.
- Part number: P073120
- Also listed as: 3310103856
- Manufacturer: Chicago Pneumatic
- Crowder SKU: CP-P073120
- Listed on breakdowns for: CP 0003 Backfill Tamper
