XCMG Spare Parts O RING 170X5.3 803173990

This is a genuine XCMG replacement O-ring, specifically designed for heavy-duty hydraulic systems. It’s the real deal for maintaining sealing integrity in excavator arms or breaker hammers where high pressure is a constant factor.

You are looking at part number 803173990. It measures exactly 170mm on the inside diameter with a 5.3mm cross-section, so it fits those specific rod or piston grooves without being too loose or too tight.

The material composition meets XCMG’s factory specs for withstanding extreme temperatures and resisting mineral-based hydraulic oils. It stays flexible enough to maintain a seal even when the equipment is working hard in cold weather.

This isn’t a universal kit substitute; it’s the precise ring you’d pull out of a factory service kit. Using this genuine part ensures the gland stays dry and you avoid the headache of contamination ingress on a jobsite.

Stock up on these for routine maintenance intervals. They are the standard fix for stopping leaks on loaders, excavators, and heavy rigs that spec the original XCMG seal kits.