This is the Atlas Copco O-Ring part number 0663212700, also listed as 3371814703, Crowder SKU AC-3371814703. It seals a pressure joint inside the breaker, and because elastomer takes a set long before the metal around it wears, it is one of the first items to replace when a machine starts weeping air or oil.
It is called out in the parts diagram for the LH 18 19E Hydraulic Paving Breaker and LPD-LD Hydraulic Post Driver, and on 4 other machines. 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: 0663212700
- Also listed as: 3371814703
- Manufacturer: Atlas Copco
- Crowder SKU: AC-3371814703
- Listed on breakdowns for: LH 18 19E Hydraulic Paving Breaker, LPD-LD Hydraulic Post Driver, LHD 23M Hydraulic Rock Drill, BRK 40 40VR Hydraulic Paving Breaker, MH 11 Hydraulic Paving Breaker, MDR 30T Hydraulic Post Driver
