PV314 Track Adjuster Assembly 6 Roller track frame Fits John Deere 450G LT & LGPOne New Aftermarket Replacement Track Adjuster Assembly Fits John Deere G Series Crawler Dozers This aftermarket replacement track adjuster assembly Fits John Deere G Series crawler dozers equipped with 6 roller track frames. The track adjuster maintains proper track tension in the undercarriage system, helping to reduce wear on track components and keep the machine operating efficiently on the job site. Two assemblies are required per machine.