O-Ring, Atlas Copco part number 3371820705, listed at Crowder Supply as AC-3371820705. 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.
You will find it on the diagram for the LH 39 40E Hydraulic Paving Breaker and LH390 390HBP 400E 400E HBP Hydraulic Paving Breaker, and on 15 other machines.
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: 3371820705
- Manufacturer: Atlas Copco
- Crowder SKU: AC-3371820705
- Listed on breakdowns for: LH 39 40E Hydraulic Paving Breaker, LH390 390HBP 400E 400E HBP Hydraulic Paving Breaker, LH220 220HBP 230E 230E HPB Hydraulic Paving Breaker, LH270 270HBP 280E 280E HBP Hydraulic Paving Breaker, LPD-T & RV Hydraulic Post Driver, LGRD RV 16 RV25 Hydraulic Ground Rod Driver, +11 more
