333-2988 353-0611 353-0609 322-8714 Final Drive for CAT 320D2 320D2L 320E 323E | 20-Ton Excavator Travel Motor

The Final Drive and Travel Motor Assembly (P/N 333-2988, 353-0611, 353-0609, 322-8714) is the high-performance propulsion system engineered for the Caterpillar 320D2 and 320E series excavators. Designed for the global 20-ton workhorse class, this assembly integrates a high-efficiency 2-speed axial piston motor with a rugged multi-stage planetary gearbox, delivering the precise synchronized tracking and massive drawbar pull required for heavy construction, road building, and utility infrastructure.

Restoring Precision Tracking and Tractive Effort The Caterpillar 320D2 and 320E are the backbones of construction fleets worldwide, known for their balance of power and fuel efficiency. However, the final drive is the critical mechanical link that translates hydraulic energy into ground-moving torque. If your machine is "wandering" (tracking drift) or struggling to pivot-turn on soft ground, your 333-2988 series motor is likely experiencing internal pressure bypass.

Our premium replacement units are manufactured to handle the high-pressure demands of the Cat "E" and "D2" hydraulic systems. Built with induction-hardened gears and high-capacity bearings, these units ensure your machine tracks perfectly straight. Replacing a worn drive with our precision-engineered assembly restores the factory-standard breakout force needed for aggressive digging and efficient site transport.

These Caterpillar excavators are global staples, and our drives are optimized for:

• North America & Europe: Built for high-intensity Commercial Construction and Infrastructure sectors. These drives are fully compatible with low-noise standards and modern high-pressure hydraulic oils.

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

• Middle East & Africa: Optimized with enhanced thermal dissipation properties to maintain gear oil viscosity in high-ambient desert temperatures, preventing premature planetary gear pitting.

• The "Silent Killer" (Case Drain Pressure): Cat 320 series machines generate high flow. Before installing your new 353-0611, ensure the case drain line is clear. A blockage here will blow the shaft seal of your new motor almost immediately.

• Oil Analysis (S.O.S.): Change your planetary gear oil every 500–1,000 hours. If the oil looks like "silver paint" (metallic flakes), your bearings are spalling. Catch it early to save the gears.

• Sprocket Bolt Care: The 320D2/E generates massive torque. Never reuse old sprocket bolts. Always use new Grade 10.9 or 12.9 bolts and a high-strength thread locker to prevent the sprocket from working loose and damaging the drive flange.

• 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 of the rotary group.

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