This is Atlas Copco part number 0661100042, also listed as 3377016125 seal ring, stocked at Crowder Supply as AC-3377016125. It keeps air or oil where it belongs inside the power pack. Once it flattens or hardens, the machine loses pressure across the joint and performance falls off gradually rather than all at once.
Crowder’s breakdowns list this part on the APP18 Twin Hydraulic Power Pac and LP 13-30P Hydraulic Power Pac, and on 5 other machines. Compare it to the reference callout on the diagram to be sure it is the position you need.
If you need the parts around it, the full diagram library has the full breakdown library, and the Atlas Copco lineup covers the machines themselves. Denver stock, with same-day shipment on in-stock orders in by 4 PM ET.
- Part number: 0661100042
- Also listed as: 3377016125
- Manufacturer: Atlas Copco
- Crowder SKU: AC-3377016125
- Listed on breakdowns for: APP18 Twin Hydraulic Power Pac, LP 13-30P Hydraulic Power Pac, LP 18-2×20/1×40 Twin PE Hydraulic Power Pac, LHD 23M Hydraulic Rock Drill, RDR 48R Rock Drill, RDR 48M Rock Drill, +1 more
