Heavy Equipment Parts stocks a wide range of O-rings for excavators and heavy machinery hydraulic systems. O-rings are critical sealing components used throughout hydraulic circuits, cylinder end caps, valve bodies, and fittings. A failed O-ring causes hydraulic leaks that reduce system pressure and performance. Our O-rings are available in NBR, Viton, and polyurethane compounds to suit different fluid types and temperature ranges. We carry O-rings in a comprehensive range of sizes to suit all major OEM applications. Stocked in Sydney with fast delivery available across Australia.