CATERPILLAR 521-8398 Cylinder AS 5218398

Caterpillar 521-8398 Cylinder AS – OEM-Grade Hydraulic Cylinder for D9 Series Track-Type Tractors

The Caterpillar 521-8398 Cylinder AS is a high-performance hydraulic cylinder engineered specifically for a wide range of D9 series track-type tractors, including models 8BL-D9R, 7TL-D9R, ABK-D9R, ACL-D9R, WDM-D9R, JJB-D9R, REX-D9T, RJS-D9T, TWG-D9T, AK4-D9 GC, HWH-D9R, J3D-D9, and JC2-D9. Manufactured to meet stringent OEM specifications, this cylinder ensures optimal compatibility and durability under extreme load conditions typical in heavy-duty earthmoving and construction applications. The robust metallurgy and precision machining guarantee superior resistance to wear, corrosion, and hydraulic pressure fluctuations, extending the service life of your drivetrain components.

Technically, the 521-8398 Cylinder AS features precision-engineered bore diameters and piston rods designed to maintain consistent hydraulic pressure and fluid flow, which enhances the tractor’s operational efficiency and control responsiveness. Its high-strength steel construction and advanced sealing technology minimize leakage and contamination ingress, critical for maintaining system integrity in harsh environments. This cylinder supports smooth articulation and load handling, contributing to improved machine uptime and reduced maintenance costs. Ideal for demanding Caterpillar D9 models, it delivers reliable performance that meets or exceeds OEM standards.

🔗 For detailed specifications and to purchase the Caterpillar 521-8398 Cylinder AS, visit the official product page at Caterpillar 521-8398 Cylinder AS on AllParts Expert.