Atlas Copco / Epiroc Hydraulic Breaker Seal Kit & Diaphragm Fitment Guide
Atlas Copco and Epiroc hydraulic breakers — including the popular SB and HB series — are workhorses on demolition and excavation sites. When it's time for a service, getting the right seal kit or diaphragm is critical. This guide helps you identify the correct parts and order with confidence.
Atlas Copco and Epiroc: What's the Difference?
Epiroc was spun off from Atlas Copco in 2018 and took over the hydraulic attachment product line. If your breaker was manufactured before 2018, it's branded Atlas Copco; after 2018, it's Epiroc. The good news: many parts are cross-compatible across the transition, and our catalog covers both generations.
Signs Your Seal Kit or Diaphragm Needs Replacing
Don't wait for a full failure. Watch for these warning signs:
- Oil weeping or leaking from the breaker housing or piston area
- Reduced blow frequency or impact energy
- Difficulty maintaining nitrogen pre-charge pressure
- Visible wear, cracking, or swelling on the diaphragm membrane
A proactive replacement during scheduled maintenance is far less costly than an emergency repair on a job site.
Finding the Right Seal Kit
Atlas Copco/Epiroc seal kits are model-specific. The kit for an SB 302 is not the same as one for an HB 2000. You'll need your breaker model number (from the data plate) to confirm fitment. Our Atlas Copco/Epiroc Seal Kit collection is organized by model to make selection straightforward.
Diaphragm Replacement
The diaphragm is a wear item that should be inspected at every major service interval. For Atlas Copco/Epiroc breakers, diaphragm replacement is typically part of a full seal service. Browse our Atlas Copco/Epiroc Diaphragm collection for model-matched options.
Ordering Tips
- Confirm your model number before ordering — don't rely on visual comparison alone
- Service the seal kit and diaphragm at the same time to minimize downtime
- Keep a spare kit on hand if your breaker runs daily — lead times matter when you're on a deadline
Browse the full Atlas Copco/Epiroc collection or jump directly to Seal Kits and Diaphragms to find your parts.