202-60-00302 202-60-66102 TM18 GM18 Final Drive for Komatsu PC100-3 -5 -6 | 10-Ton Travel Motor

The Final Drive Assembly for the Yanmar B-Series (B22, B25V, B27, B37V) and the ViO Zero Tail Swing Series (ViO30) is a high-precision propulsion unit designed for the 2.0 to 4.0-ton mini excavator class. These units integrate a variable displacement axial piston motor with a high-torque planetary reduction gearbox, delivering the smooth, synchronized tracking and "zero-drift" performance that Yanmar machines are globally recognized for.

Precision Tracking and Tractive Effort for Legacy Machines The Komatsu PC100 series is a global benchmark for durability in the 10-ton class. However, whether it is an older PC100-3 or a more modern PC100-6, the final drive remains the most critical wear item in the undercarriage. The TM18/GM18 motor unit is responsible for translating hydraulic flow into the drawbar pull needed for trenching and site preparation.

Our replacement units are manufactured to handle the specific hydraulic flow curves of Komatsu's Open-Center and HydrauMind systems. Featuring induction-hardened gears and precision-lapped valve plates, these drives eliminate the "wandering" (tracking drift) common in high-hour machines. Replacing a failing drive with our precision assembly restores the factory-standard counter-rotation and climbing ability your Komatsu was built for.

These Komatsu machines remain vital in various global sectors, and our drives are optimized for:

• Southeast Asia & Oceania: Engineered to survive in high-intensity Agricultural and Infrastructure projects where machines often work in deep mud or high-salinity coastal environments.

• North America & Europe: Ideal for Utility and Rental fleets where these machines are used for medium-duty excavation. Built for high-frequency use and 100% compatibility with standard hydraulic oils.

• South America & Africa: Optimized with enhanced thermal dissipation properties and "Mining-Grade" floating seals to prevent the ingress of abrasive dust in hot, dry climates.

• The "Silent Killer" (Case Drain Pressure): On older PC100 models, the case drain return line is critical. Before installing your new TM18 motor, ensure the drain line is clear. A blockage will blow the shaft seal of your new motor almost immediately.

• Gear Oil Forensics: Change the planetary gear oil every 500 operating hours. If the oil looks like "silver paint," your bearings are spalling. Catch it early to save the gears.

• Sprocket Bolt Care: The PC100 generates significant torque. Never reuse old sprocket bolts; they stretch over time. Always use new Grade 10.9 bolts and a high-strength thread locker to prevent flange damage.

• System Priming: Never run a new travel motor "dry." Fill the motor case with clean hydraulic oil through the highest port before starting the engine to ensure instant 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