JD 850J Bulldozer Undercarriage Chains supplier

The Bulldozer Track Chains (Track Link Assembly) function as the primary weight-bearing and propulsion element within the John Deere 850J undercarriage. This specific AT227101 assembly is a sealed and lubricated track chain (SALT) system, designed to achieve maximum wear life by containing internal lubricant within the pin-and-bushing joint. The assembly is constructed from precision-forged steel links, interconnected by induction-hardened pins and bushings. This foundational design is critical for maintaining consistent track tension and reliably transferring the machine's full operational torque. Our Factory Direct manufacturing process ensures dimensional conformity to OEM specifications, which is essential for perfect engagement with the idler and sprocket components of the 850J.