D47539 Nut Fits Case 450 to s/n 3050800One New Aftermarket Replacement Track Spring Nut Fits Case 450 Crawler Dozer This aftermarket replacement track spring nut (also described as Nut, Track Spring) fits the early production Fits Case 450 crawler dozer and is a key component of the undercarriage recoil spring assembly. The recoil spring system maintains proper track tension and cushions impacts to protect the undercarriage. This nut is specific to early build 450 dozers serial number
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