Single Flange Roller Fits John Deere 450 and 550 Bulldozers AT185737One New Aftermarket Replacement Single Flange Bottom Track Roller Fits John Deere Bulldozers and Crawler Loaders This single flange bottom track roller (also called a lower roller or track support roller) is a direct aftermarket replacement for the Fits John Deere (Fits JD) 450 and 550 series undercarriage systems. Bottom rollers support the weight of the machine on the track chain, and replacement is essential when rollers develop leaks, flat spots,
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Single Flange Roller Fits John Deere 450 and 550 Bulldozers AT185737