Valve Block – Complete, Atlas Copco part number 3377021027, listed at Crowder Supply as AC-3377021027. This part controls the working cycle of the power pack. When its faces wear, the tool sounds different and the blow rate falls off usually the first thing checked on a slow machine.
It appears on the APP18 Twin Hydraulic Power Pac and PAC P18 Twin E11 Twin Hydraulic Power Pac breakdown. Check it against the reference number on the diagram first; serial breaks change what fits.
The parts diagram library indexes every breakdown we publish, and the Atlas Copco lineup has the tools these parts go into. Stocked in Denver orders placed by 4 PM ET ship the same day when the part is on the shelf.
- Part number: 3377021027
- Manufacturer: Atlas Copco
- Crowder SKU: AC-3377021027
- Listed on breakdowns for: APP18 Twin Hydraulic Power Pac, PAC P18 Twin E11 Twin Hydraulic Power Pac

