PV305 John Deere 450E 550 550B LT track adjuster. Complete track adjuster assembly for the following John Deere models: 450E, 550, 550B, dozer, with 6 roller track frames. These adjusters are manufactured here in the USA and are made from high strength steel and are precision welded. These replacement track adjusters are an exact fit and require no modifications.
Note: Machines with 5 roller track frames such as the 450 Loader, 450, 450B, 450C, 450D, 450E, 550 & 550B require the PV300.