Forged Top Roller Compatible w/ Kubota Excavator U45-3 Replaces RD461-21900

We introduces a significant component of the undercarriage system dubbed Forged Top Roller RD461-21900 for Kubota Mini Excavator Kx040-4, KX121-3, and KX161-3. The carrier roller ensures support for the weight of the machines, keeps proper alignment of the track, and is mounted onto the top of the track frame. Our top roller is constructed from carbon structural steel with a forging technique for performance. It can replace these OEM part numbers AT251344 4392416 4357784 RD411-22900 RD547-22900 whereas it provides compatibility with excavators of the following brands: Kubota, Hitachi, & JCB. You will find the complete list of brand compatibility and part numbers below. Whereas dimensions of the top roller are as follows: 7 1/4in overall length, 3 1/8in outer diameter, and 1 3/16in shaft diameter. Steel Construction: We have constructed our specified brand mini excavator top carrier rollers from carbon structural steel (S45C) and coated with acrylic polyurethane. The material is engineered from the forging process, which will ensure uninterrupted performance and durability despite continuous use. Utilize for heavy operations without a second thought as it's rust-proof and can bear temperature ranges from -22 Degrees F to 230 Degrees F. High-Quality Seal: The Kubota excavator top roller incorporated a high-quality nitrile butadiene rubber (NBR) seal. Life Expectancy: This integral undercarriage component has an average life expectancy of 1,600 operational hours or 1 year. Keep this tool in check for wear and tear for better stability, efficiency, and service life. Compatibility: Replaces OEM part number: AT251344 4392416 4357784 RD411-22900 RD547-22900 Compatible with Kubota excavator models: U45-3 U55 RX303 U30-3 U45-3 U48-4 U50-3 U55-4 KX121-3 KX161-3 KX161-3SS RX303 U30-3 U45-3 U48-4 U50-3 U55-4 KX 040-4 (serials 25914 and below) KX 057-4 Compatible with Hitachi excavator models: EX30-1 EX30-2 EX30UR-1 EX30-2 EX35-1 EX35-2 EX40 EX45-2 ZX30U-2 EX40 EX40U EX45 EX45-2 EX50 EX50U EX50UR EX55UR ZX40U ZX50U ZX50 Compatible with excavator models: 50ZTS 27ZTS 35ZTS 27CZTS 35CZTS 50CZTS 27C 27ZTS 35C 35ZTS 50C 50ZTS 60D 60G Compatible with JCB mini excavator models: 8040 8045 805.2 8060 Compatible with Komatsu mini excavator models: PC35R-8 PC40R-8 PC45-1 PC45R-8 PCMR-2 Fits mini excavator models: KX040-4, KX057-4, KX057-5, KX 121-3, KX 161-3, KX161-3SS, U45S/ST U48-5, U55, U55-4 and U55-5 Note: Check the OEM part number and compatibility list before purchasing.