Ordering by number: this is 3377000403, the Atlas Copco seal. It seals a pressure joint inside the power pack, and because elastomer takes a set long before the metal around it wears, it is one of the first items to replace when a machine starts weeping air or oil.
Crowder’s breakdowns list this part on the PAC P18 Twin E11 Twin Hydraulic Power Pac and APP18 Twin Hydraulic Power Pac, and on 4 other machines. Check it against the reference number on the diagram first; serial breaks change what fits.
Use the full diagram library to work through the rest of the assembly, or the Atlas Copco lineup if you are pricing a replacement machine. It ships out of Denver, same day on in-stock orders placed before 4 PM ET.
- Part number: 3377000403
- Manufacturer: Atlas Copco
- Crowder SKU: AC-3377000403
- Listed on breakdowns for: PAC P18 Twin E11 Twin Hydraulic Power Pac, APP18 Twin Hydraulic Power Pac, LP 13-20 DEL Hydraulic Power Pac, LP 13-30P Hydraulic Power Pac, LP 18-30PE & 18-40 PE Hydraulic Power Pac, LP 18-2×20/1×40 Twin PE Hydraulic Power Pac
