Spacer Block is the Chicago Pneumatic service part carried under part number 3377000663. This cushions impact inside the power pack. Buffers are designed to break down before the castings do, which makes them a routine replacement.
Crowder’s breakdowns list this part on the LP 18-2×20/1×40 Twin PE Hydraulic Power Pac and PAC P18 Twin E11 Twin Hydraulic Power Pac. The tool itself is the Atlas Copco LP 18 Twin Hydraulic Power Pack.
Everything else on that machine is one page away, and the full diagram library indexes every breakdown we publish. Ships from our Denver warehouse; in-stock parts ordered by 4 PM ET go out the same day.
- Part number: 3377000663
- Manufacturer: Chicago Pneumatic
- Crowder SKU: CP-3377000663
- Listed on breakdowns for: LP 18-2×20/1×40 Twin PE Hydraulic Power Pac, PAC P18 Twin E11 Twin Hydraulic Power Pac

