This is Atlas Copco part number 0663211325 O-Ring, stocked at Crowder Supply as AC-0663211325. Its job is to hold the pressure boundary between two mating faces; a hardened or nicked seal shows up as lost power and a damp housing well before anything else fails.
Crowder’s breakdowns list this part on the LP 18-30PE & 18-40 PE Hydraulic Power Pac. 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.
Everything else on that machine is one page away on the full diagram library; complete tools are on the Atlas Copco catalog. Stocked in Denver orders placed by 4 PM ET ship the same day when the part is on the shelf.
- Part number: 0663211325
- Manufacturer: Atlas Copco
- Crowder SKU: AC-0663211325
- Listed on breakdowns for: LP 18-30PE & 18-40 PE Hydraulic Power Pac

