Ordering by number: this is 0300801900, the Atlas Copco washer. It spreads clamp load and protects the face under the fastener routine hardware, but the wrong one changes how the joint holds torque.
Crowder’s breakdowns list this part on the PAC P18 Twin E11 Twin Hydraulic Power Pac and MH55 55A HBP Hydraulic Paving Breaker, and on 11 other machines. 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. Denver stock, with same-day shipment on in-stock orders in by 4 PM ET.
- Part number: 0300801900
- Manufacturer: Atlas Copco
- Crowder SKU: AC-0300801900
- Listed on breakdowns for: PAC P18 Twin E11 Twin Hydraulic Power Pac, MH55 55A HBP Hydraulic Paving Breaker, MH70 70A HBP Hydraulic Paving Breaker, APP18 Twin Hydraulic Power Pac, LH390 390HBP 400E 400E HBP Hydraulic Paving Breaker, LH220 220HBP 230E 230E HPB Hydraulic Paving Breaker, +7 more
