Description

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.