In 2026, the global demand for maintenance of 4-ton mini excavator chassis continued to surge. Kubota KX040-4/KX040-5 dedicated track chains, thanks to their original factory precision manufacturing, deep-hardened wear-resistant properties, and strong adaptability to all working conditions, consistently ranked among the top search terms for mini excavator track chains in Europe, America, Australia, Southeast Asia, and the Middle East. They are core chassis wear parts for municipal construction, landscaping renovation, small-scale infrastructure projects, and farmland irrigation, and are also key load-bearing components of the Kubota KX040-4 (classic model) and KX040-5 (2025 replacement model) overall walking system.
As Kubota’s best-selling 4-ton mini excavator models globally, the KX040-4 and KX040-5 have a global installed base of over 120,000 units. The track chains, as the “core skeleton” of the walking system, directly determine the overall machine’s walking stability, traction output, chassis durability, and construction efficiency. This dedicated chain is meticulously developed in a 1:1 replica of the original factory drawings, with precise original part numbers: RD819-22202 and TC620-39700. It perfectly matches the entire KX040-4 and KX040-5 series of excavators, and is also compatible with mainstream 4-ton mini excavators from Europe and America, such as the Bobcat E42, Doosan DX40Z, and Takeuchi TB240. Its versatility covers over 90% of the global market for similar models, making it a star chassis component among Kubota’s 4-ton mini excavator chains, boasting wide compatibility and a high repurchase rate.
With comprehensive upgrades in technology and performance, this product addresses industry pain points: The chain is made of 35Mn2 high manganese steel forging + deep quenching of chain pins/chain passages + thickened wear-resistant steel plates + rust-resistant blackening treatment, a quadruple strengthening process that increases tensile strength to 1200MPa, improves wear life by 50%, and enhances tensile strength, fracture resistance, and corrosion resistance by 60% compared to ordinary chains, completely solving the problems of traditional chains such as easy elongation, rapid wear, easy breakage, rust, and chain jamming. Designed for the high-frequency, heavy-duty, muddy, gravel, and rugged road conditions of the KX040-4/KX040-5, this product features a precision pitch design, a leak-proof sealing structure, and a long-lasting anti-aging formula: The precision pitch (154mm) ensures perfect meshing with the drive and guide wheels, resulting in smooth, non-skimming operation and reduced noise and vibration; the one-piece molded dustproof seal prevents mud and water from entering the chain pins, reducing wear and corrosion; and high-temperature and aging-resistant treatment allows it to withstand extreme temperatures from -25℃ to 85℃, extending its service life by 40% in humid and dusty environments.
Reliable quality, global stock and rapid supply: All chains are ISO9001 quality system certified and undergo 150,000 fatigue tensile tests, wear life tests, sealing and dustproof tests, and harsh working condition simulation tests before leaving the factory. Quality is on par with the original manufacturer, but the price is only 40% of the original manufacturer’s. Sufficient factory stock is available, supporting single-chain purchases and bulk orders for chassis packages. Direct shipping from warehouses worldwide perfectly matches the regular maintenance needs of European and American rental companies, bulk replacement needs of engineering companies, and inventory needs of overseas distributors. In 2026, the global mini excavator maintenance market continued to expand, and high-quality Kubota KX040-4/KX040-5 chains became the first choice for chassis parts procurement. Simultaneously, a complete set of chassis parts, including rubber tracks, track rollers, drive sprockets, guide wheels, and tensioner cylinders, were provided, offering a one-stop solution for the maintenance and repair needs of KX040-4/KX040-5 mini excavator chassis, helping global customers reduce maintenance costs, shorten downtime, and seize market opportunities.
Global trending keywords (suitable for independent website SEO + social media traffic): Kubota KX040-4 track chain, KX040-5 track chain, Kubota 4-ton mini excavator chain, Kubota KX040-4/KX040-5 track chain, Kubota track link RD819-22202, compact excavator track link, Kubota chassis and running gear, Kubota undercarriage parts, mini excavator four wheels and one track, Kubota KX040-5 replacement chassis parts.
Fujian Fortune Parts Co., Ltd. is specializing in full-range undercarriage parts for excavators and bulldozers, as well as various auto parts. With complete product lines, stable quality and sufficient stock, we focus on construction machinery parts for many years and provide reliable products and after-sales service. Please feel free to contact us via the information below if you have any purchasing demands.
Sales Manager： Tin Fu
Mobile/Whatsapp:+8617750909080
Email: sales@fortune-parts.com
Post time: May-09-2026