When your hydraulic cylinder starts leaking or your implement won’t hold position, chances are the U-cup seal inside has given up the ghost. This is one of those little parts that does a big job—sealing the piston to keep hydraulic pressure where it belongs. Without a good U-cup, your cylinder loses power and starts making messes on your shop floor.
What You’re Getting
- Precision-molded U-cup design that seals against the cylinder wall under pressure
- Made from hydraulic fluid-resistant materials that handle heat and pressure cycles
- Flexible lip design automatically adjusts to cylinder wall irregularities for reliable sealing
- Cross manufacturing quality that meets hydraulic system pressure requirements
Built for Real Farm Work
This U-cup works in Cross hydraulic cylinders across a wide range of farm equipment—from loader cylinders on utility tractors to lift cylinders on implements. Whether you’re running a bush hog, operating a grapple, or raising a hay rake, hydraulic cylinders take a beating in farm service and need quality seals to keep working reliably.
Made to Last
Cross U-cups are engineered for the demanding world of agricultural hydraulics. The special rubber compound resists breakdown from hydraulic fluid contact while maintaining flexibility through temperature extremes. The U-shape design actually works better as pressure increases, creating a tighter seal when your system is working hard.
Good to Know
Before installing a new U-cup, check the cylinder wall for scratches that could damage the seal. Clean everything thoroughly—dirt is a seal’s worst enemy. Install with the open side of the U facing the pressure side of the cylinder. A thin coating of clean hydraulic fluid helps the seal slip into place without damage.
