We introduce 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. The roller encompasses smooth operation of the mini excavator while reducing the friction and wear on the track. Our top roller is constructed from carbon structural steel with a forging technique for long-lasting 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. To explore the complete list of specifications and compatibility, scroll down:--
Dimension & Designs: Our Kubota and other brands' track rollers are crafted to exact OEM specifications and standards to ensure accurate compatibility. You will find the complete list of brand compatibility and part numbers below. Whereas dimensions of the top roller are as follows: 7-1/4" overall length, 3-1/8" outer diameter, and 1-3/16" 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. It will provide great strength to withstand the rigors of track on the road. 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°F to 230°F.
High-Quality Seal: The Kubota excavator top roller incorporated a high-quality nitrile butadiene rubber (NBR) seal. It will have excellent lubrication and oil retention to enhance the overall performance of the excavator. Additionally, it will restrict the entry of dirt, mud, and grime inside the bearings. Thus, ensuring long-lasting performance and life.
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.