Back Cover, Atlas Copco part number 3377800187, listed at Crowder Supply as AC-3377800187. It is a structural or enclosing component of the power pack, and it is usually replaced because of impact damage rather than gradual wear.
The published breakdown lists it on the LP 9-20P 9-20E Hydraulic Power Pac.
Everything else on that machine is one page away on the parts diagram library; complete tools are on the Atlas Copco catalog. It ships out of Denver, same day on in-stock orders placed before 4 PM ET.
- Part number: 3377800187
- Manufacturer: Atlas Copco
- Crowder SKU: AC-3377800187
- Listed on breakdowns for: LP 9-20P 9-20E Hydraulic Power Pac

