Kobelco SK115 SK135 SK115SR SK135SR Final Drive | High-Torque Travel Motor & Gearbox

The Final Drive Assembly for Kobelco SK115 and SK135 (including the SR - Short Radius series) is the high-performance propulsion system engineered for the 11-ton to 14-ton excavator class. These units integrate a high-efficiency hydraulic motor with a multi-stage planetary gearbox, delivering the "precision-tracking" and massive tractive effort required for urban development, roadwork, and forestry.

Restore Your Machine’s "Straight-Line" Tracking The Kobelco SK115SR and SK135SR are the kings of the urban job site. Their short-radius design allows them to work where others can't—but that agility depends entirely on the final drives. If your excavator is "veering" to one side or struggling to climb onto a trailer, your travel motor is likely bypassing pressure.

Our premium final drives are designed to handle the high duty cycles of 13-ton machines. Built with induction-hardened gears and high-load bearings, these units ensure that your Kobelco retains its factory-fresh responsiveness. Replacing a worn drive with our precision assembly doesn't just fix a leak; it restores the synchronized power needed for smooth counter-rotation and trenching.

• Europe & North America: Optimized for the Urban Utility and Rental sectors. These units are built for high-frequency use and are fully compatible with low-noise standards and biological hydraulic fluids.

• Southeast Asia & Oceania: Features reinforced "Mining-Grade" floating seals to prevent the ingress of abrasive tropical mud and high-salinity water in coastal projects.

• Japan: Specifically tuned to match the high-precision "iNDr" (Integrated Noise and Dust Reduction) systems for jerk-free, quiet travel.

The Case Drain Rule: On Kobelco machines, case drain backpressure is the #1 motor killer. Always check the case drain filter/line for obstructions before installing a new motor. If pressure builds up here, it will blow the main shaft seal in minutes.

• Gear Oil Forensics: Change planetary oil every 500 hours. If you see "silver glitter" in the oil, a planetary bearing is failing—address it before the entire gearbox is destroyed.

• Seal Vigilance: Any oil weeping near the sprocket is an emergency. Once the oil gets out, dirt gets in, and the gears will grind themselves into dust.

• Priming: Never run a new motor "dry." Fill the motor case with clean hydraulic oil before starting the engine to ensure immediate lubrication.

Guangzhou Tieqi Construction Machinery Co., Ltd. (IRON CAVALRY) is strategically located in Guangzhou's Huangpu District, approximately an hour from Baiyun International Airport. We have been a dedicated specialist in engineering machinery hydraulics for nearly 15 years.

Driven by our core values of "Pragmatism and Progress," we are committed to delivering practical solutions and upholding our responsibilities. This principle-driven approach defines all our operations and client partnerships.

In China's excavator hydraulic assembly sector, our efficient execution and rigorous approach to manufacturing every product to meet over 95% of original performance specifications have built widespread trust. This has made us a destination for industry peers and clients seeking knowledge and reliable supply.

Our capability is backed by a ready inventory of over 500 assembly types, providing access to more than 6,000 different parts. Hydraulic pump, control valve, travel, and swing assemblies are our core products, with a distinct advantage in large mining excavator components and hard-to-find items.

Our 4,000-square-meter factory in Guangzhou is equipped for professional manufacturing, precision assembly, rigorous testing, and quality certification, ensuring reliable performance and timely delivery for every order.

For large items, we use sturdy plywood crates secured with metal fasteners for added stability. Inside, the products are cushioned with bubble wrap and secured with wooden braces, while special attention is given to protecting vulnerable parts. Externally, the crates are reinforced with high-strength PET plastic strapping and wrapped in highly waterproof black film.

• One-stop solution provider for all your hydraulic component needs
• High-quality products at competitive prices
• Exceptional customer service that makes you feel at home
• Large inventory, short delivery times, and long warranty periods
• Professional expertise with accurate part number identification for excavator components