Ordering by number: this is 3377000484, the Atlas Copco circlip. It pins its assembly together. Vibration is what kills them, so they are cheap insurance during any teardown of the power pack.
It is called out in the parts diagram for the PAC P18 Twin E11 Twin Hydraulic Power Pac and APP18 Twin Hydraulic Power Pac, and on 1 other machine. Worth matching the reference number on the diagram against your own machine before you order the same part number can sit in more than one position.
If you need the parts around it, the parts diagram hub has the full breakdown library, and the Atlas Copco catalog covers the machines themselves. Ships from our Denver warehouse; in-stock parts ordered by 4 PM ET go out the same day.
- Part number: 3377000484
- Manufacturer: Atlas Copco
- Crowder SKU: AC-3377000484
- Listed on breakdowns for: PAC P18 Twin E11 Twin Hydraulic Power Pac, APP18 Twin Hydraulic Power Pac, LP 18-2×20/1×40 Twin PE Hydraulic Power Pac

