This is Atlas Copco part number 3371821277 washer, stocked at Crowder Supply as AC-3371821277. It spreads clamp load and protects the face under the fastener routine hardware, but the wrong one changes how the joint holds torque.
It is called out in the parts diagram for the MDR 30T Hydraulic Post Driver and LPD-LD Hydraulic Post Driver, and on 1 other machine. Check it against the reference number on the diagram first; serial breaks change what fits.
The rest of the assembly is on the same breakdown, and every diagram we publish is indexed on the parts breakdown index. It ships out of Denver, same day on in-stock orders placed before 4 PM ET.
- Part number: 3371821277
- Manufacturer: Atlas Copco
- Crowder SKU: AC-3371821277
- Listed on breakdowns for: MDR 30T Hydraulic Post Driver, LPD-LD Hydraulic Post Driver, PDR 30T Hydraulic Post Driver
