XCMG Spare Parts O RING 103×3.55 803172049

This is a genuine XCMG replacement O-Ring, specifically part number 803172049. It’s designed to create a positive seal between hydraulic components, preventing fluid leaks and maintaining system pressure. Using authentic XCMG rubber goods ensures you don't get cross-contamination or premature failure.

The dimensions are a standard metric size of 103mm internal diameter with a 3.55mm cross-section. This isn't a universal fit; it's the exact ring used during final assembly at the XCMG factory. You can measure your old seal against these specs to confirm the match before installing.

It’s manufactured from a durable NBR compound (Nitrile Rubber), which holds up well against mineral oils, greases, and hydraulic fluids. The material stays flexible under high compression but resists hardening and cracking over time. It handles the temperature swings and vibrations common in heavy equipment operation.

Physically, the ring has a consistent, smooth surface with no visible mold lines or imperfections that could compromise the seal. It feels dense and springy to the touch. We keep these in stock specifically because they are a common wear item during pump overhauls or cylinder repacking.

Whether you are servicing a road roller, a excavator, or a loader, this O-ring helps keep the mud out and the oil in. It’s a small component, but a critical one for reliability on the job site. Always replace O-rings when you break a hydraulic connection to ensure a tight seal.