R57098 Track Adjuster Assembly Fits Case Dozer 650 650GOne New Aftermarket Replacement Track Adjuster Assembly Fits Case Crawler Dozer This aftermarket replacement track adjuster assembly is a critical undercarriage component that maintains proper track tension on Fits Case 650 and 650G crawler dozers and loaders equipped with the 5 roller track frame. Proper track tension is essential for traction, stability, and reducing wear on rollers, idlers, and sprockets. Each machine requires two (2) assemblies.