One New Aftermarket Replacement Track Roller Group Fits Caterpillar (Fits CAT) Bulldozers and LoadersThis double flange track roller group (bottom roller) is a direct-fit undercarriage replacement Fits Caterpillar (Fits CAT) D7E bulldozers and 977-series track loaders. The bottom roller rides along the track chain, bearing the machine's weight and guiding the track through the undercarriage system. The double flange design retains the track laterally on both sides, making it the correct configuration for these applications.Specifications Flange Type: Double Flange Weight: Approximately 170 lbs. Part Type: Track Roller Group (Bottom Roller) Compatible ModelsFits Caterpillar Bulldozers: D7EFits Caterpillar Track Loaders: 977K, 977H, 977LReplaces Part Number(s):1P9102, 1181620, CR1652/2, CR1652A2V, UNI70-0023New aftermarket replacement part - not remanufactured, not used.