This O_ring 86288222 avoids these risks because it’s a genuine OEM part, engineered to Montabert’s strict standards for oil resistance and durability. Unlike generic alternatives, it uses a specialized nitrile rubber compound (or fluororubber, based on HC50’s fluid type) that retains flexibility and sealing performance even after 800 hours of contact with high-pressure hydraulic oil—no hardening, cracking, or swelling. Its inner diameter and cross-sectional thickness are precision-machined to match HC50’s connection tolerances exactly, so there’s no “over-compression” or “under-sealing” (common issues with aftermarket O-rings that shorten service life).

The 800-hour replacement cycle is based on real mining field data: O-rings endure constant pressure and friction, so even OEM seals start to lose elasticity after this period. Proactive replacement here keeps the hydraulic system leak-free, protects expensive internal components, and avoids unexpected breakdowns. And with short delivery times (no 2-3 week waits like generic O-rings), you can restock fast to keep your HC50 drills running. Add in competitive pricing that beats many non-OEM options, and this O_ring 86288222 becomes an essential choice for mines prioritizing reliability and cost-efficiency. Whether you’re drilling in underground hard-rock mines or surface quarries, it ensures your HC50’s hydraulic connections stay sealed—shift after shift.