10129790 12835573 Final Drive Travel Motor for Liebherr R920 R922 R924 | High-Performance Planetary Gearbox Spare Parts

The Final Drive and Travel Motor Assembly (10129790 & 12835573) is the precision-engineered propulsion system for Liebherr R920, R922, and R924 Generation 6 crawler excavators. This assembly integrates a CMVE085 high-pressure hydraulic motor with a multi-stage coaxial planetary gearbox (FAT series), providing the massive tractive effort and stable torque required for the 20 to 28-ton excavator class in demanding earthmoving and infrastructure projects.

Maximum Tractive Force for Generation 6 Excavators The Liebherr R920, R922, and R924 series are designed for versatility and high fuel efficiency. The 10129790 Final Drive is the critical link that translates the machine’s hydraulic energy into high-torque mechanical movement. By pairing the 12835573 (CMVE085) motor with Liebherr's optimized planetary gearing, this unit ensures smooth two-speed travel and superior gradeability, even when operating on steep inclines or soft, saturated ground.

Internal wear in the sun gears or piston block can cause the excavator to "wander" or lose power on one track, significantly reducing site productivity. Our premium aftermarket assemblies are built with case-hardened gears and high-strength forged planetary supports to resist the extreme structural fatigue common in 24/7 construction cycles. Replacing your worn drive with our 10129790 series assembly restores factory-standard propulsion and protects your project timeline.

The Liebherr R920-R924 series is a global workhorse, and our drive assemblies are built to excel in diverse climates:

• Europe & North America: Meets the high-precision requirements for road building and civil engineering where low-noise operation and high reliability are essential.

• Southeast Asia & Oceania: Features reinforced "Heavy-Duty" floating seals to prevent the ingress of abrasive sand, tropical mud, and moisture in coastal and jungle sites.

• Middle East & Africa: Optimized for high thermal resilience in the CMVE085 motor section, preventing seal hardening and oil degradation in high-ambient desert heat.

• CIS Regions: Engineered with metallurgical properties that maintain structural toughness in sub-zero temperatures, preventing housing cracks during winter startup.

To ensure the 10129790 assembly reaches its maximum service life of several thousand hours, strict maintenance protocols must be followed:

• Case Drain Line Verification: Before operating the new 12835573 motor, ensure the case drain line is completely free of obstructions. Any back-pressure in this line will blow the motor’s main shaft seal instantly.

• Gear Oil Management: Change the planetary gearbox oil every 1,000 operating hours. For machines working in water or abrasive mud, shorten this interval to prevent microscopic grit from grinding down the sun gear and planet wheels.

• Hydraulic System Flushing: If the previous motor suffered a catastrophic failure (piston fragmentation), a full system flush is mandatory. Residual metal shards in the hydraulic lines will act like sandpaper, destroying a new motor in minutes.

• Air Purge Procedure: Never start the engine with a "dry" motor. Fill the motor case with clean hydraulic oil through the highest drain port before startup. Cycle the travel function at low idle to purge all trapped air before applying full working loads.

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