Ordering by number: this is 3378402131, the Atlas Copco spring washer. It loads its mating part against the seat. When free length drops, the symptom is inconsistent operation the tool works, but not crisply.
The published breakdown lists it on the PHB 3-14 Hydraulic Post Hole Borer. Compare it to the reference callout on the diagram to be sure it is the position you need.
The rest of the assembly is on the same breakdown, and every diagram we publish is indexed on the full diagram library. It ships out of Denver, same day on in-stock orders placed before 4 PM ET.
- Part number: 3378402131
- Manufacturer: Atlas Copco
- Crowder SKU: AC-3378402131
- Listed on breakdowns for: PHB 3-14 Hydraulic Post Hole Borer
