72271598 Final Drive for Case CX18 CX18B | Mini Excavator Travel Motor Gearbox

The Case CX18 Series Final Drive Assembly (P/N 72271598) is the precision-engineered propulsion unit designed for the Case CX18 and CX18B mini excavator range. Built for the 1.8-ton machine class, this compact powerhouse integrates a high-efficiency 2-speed hydraulic piston motor with a multi-stage planetary gearbox, providing the nimble maneuverability and reliable climbing torque required for residential landscaping, utility trenching, and tight-access urban construction.

Precision Tracking for Confined Spaces The Case CX18B is known for its smooth hydraulics and compact footprint, making it a favorite for utility contractors. However, the final drive is often the first component to show wear due to its constant exposure to abrasive grit and high-torque demands. If your machine is "drifting" to one side or struggling to climb a trailer ramp, your 72271598 travel motor is likely experiencing internal pressure bypass.

Our premium replacement units are manufactured to match Case’s strict hydraulic tolerances. Featuring induction-hardened gears and high-load bearings, this assembly eliminates "tracking fade" and ensures your machine maintains synchronized, straight-line travel even under heavy load. Replacing a worn drive with our precision assembly restores the factory-standard breakout force needed for aggressive counter-rotation and trenching.

These Case mini-excavators are global staples, and our drives are optimized for:

• North America & Europe: Engineered for the Rental and Utility sectors, providing the durability needed for high-frequency use and varied operator styles in urban infrastructure projects.

• Southeast Asia & Oceania: Features reinforced "Duo-Cone" floating seals to prevent the ingress of abrasive sandy soils and tropical mud, which are notorious for destroying mini-excavator gearbox internals.

• Japan & East Asia: Specifically tuned to match the high-precision pilot-control systems of Japanese-spec models (manufactured under the Sumitomo/Case partnership) for jerk-free travel.

• The "Silent Killer" (Case Drain Pressure): The most common cause of motor failure in Case mini-excavators is case drain backpressure. Before installing a new motor, ensure the case drain line is clear and the filter is replaced. A blockage here will blow the shaft seal of your new motor within minutes.

• Gear Oil Management: Change the planetary gear oil every 250–500 operating hours. Check for a "milky" appearance frequently—this indicates water ingress that will quickly grind down your planetary gear teeth.

• Sprocket Bolt Maintenance: Mini excavators vibrate significantly during travel. Always use new bolts with a high-strength thread locker to prevent the sprocket from working loose and damaging the drive flange.

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

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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