XCMG Spare Parts O RING 75X3.1 803196338

This is a stock replacement O-ring, not an aftermarket knock-off. It is a standard metric size used extensively across XCMG heavy machinery, from excavators to loaders. You will typically find these sealing connections in hydraulic cylinders, final drives, and pump assemblies .

It measures 75mm internally with a 3.1mm cross-section. This isn't a soft, generic rubber ring; it is formulated to handle high pressure and resist degradation from hydraulic oils and extreme temperatures. It maintains its flexibility to ensure a tight seal even after long periods of operation .

The XCMG official part number for this specific seal is 803196338. If you are looking at a parts diagram for a Swing Motor or a Boom Cylinder and see this number listed, this is the component you need to order. It is always wise to verify your old part's dimensions against these specs .

When you are rebuilding a cylinder or resealing a hydraulic manifold, this O-ring sits in a machined groove to prevent fluid bypass. Because of the 3.1mm thickness, it is robust enough to handle minor surface imperfections on mating flanges but still requires a clean surface for proper installation.

While generic O-rings might fit, genuine XCMG parts like this one are made to the correct hardness (durometer) specifications. Using the exact replacement prevents premature leaks and avoids contamination of your hydraulic system, saving you downtime and the cost of replacing contaminated oil later on .