CAT 345C 345D 349D 349DL Final Drive 227 6044 333 3036 | Heavy-Duty Travel Motor Gearbox

The Final Drive Assembly (P/N 227 6044, 227 6045, 333 3036, 355 5668) is the high-torque propulsion powerhouse engineered for Caterpillar’s 45 to 50-ton excavator fleet. Optimized for models including the 345C, 345D, 349D, and 349DL, this assembly combines a high-displacement axial piston motor with a massive three-stage planetary gearbox. It is designed to deliver the unrelenting tractive effort and "straight-line" tracking precision required for bulk earthmoving, heavy-duty mining, and large-scale infrastructure projects..

Restoring Unmatched Drawbar Pull The Caterpillar 345 and 349 series are the backbones of heavy production environments. Their ability to navigate steep pit ramps and unstable floor conditions relies entirely on the 227 6044 / 333 3036 final drive. These drives translate massive hydraulic pressure into ground-moving torque. If your machine is "wandering" or losing power during pivot turns, your travel motor is likely experiencing internal volumetric efficiency loss.

Our premium replacement units are manufactured to handle the extreme duty cycles of CAT mining-class machines. Built with precision-ground gears and high-load bearings, these drives ensure your machine stays synchronized and tracks straight. Replacing a worn-out unit doesn't just stop a leak; it restores the "factory-fresh" breakout force needed for aggressive digging and heavy material handling.

• North America & Australia: Built for the Mining and Bulk Earthmoving sectors where 24/7 reliability is mandatory. Our drives are fully compatible with high-pressure CAT hydraulic systems.

• Southeast Asia & Oceania: Features reinforced "Mining-Grade" floating seals to prevent the ingress of abrasive volcanic dust, tropical mud, and red clay, which are notorious for destroying standard gearbox seals.

• CIS Regions & Northern Europe: Engineered with metallurgical properties that resist structural fatigue in extreme sub-zero mining environments, ensuring consistent torque delivery in the harshest conditions.

• The "Silent Killer" (Case Drain Pressure): CAT 345/349 machines generate massive hydraulic flow. Before installing a new motor, verify the case drain line is clear. A blockage here will blow the main shaft seal of your new 227 6044 motor instantly.

• Gear Oil Management: Change the planetary gear oil every 500–1,000 operating hours. If the oil appears "milky," water has breached the seals; if it looks "metallic," your gear teeth are spalling. Catch it early to save the gearbox.

• Sprocket Bolt Maintenance: Due to the massive torque of the 349D, sprocket bolts can stretch. Always use new Grade 10.9 or 12.9 bolts and a high-strength thread locker to prevent flange damage.

• System Flushing: If the old motor failed due to internal fragmentation, you must flush the hydraulic tank and lines. Residual shards will destroy a new motor’s valve plate in minutes.

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