195-27-00740 / 195-27-00750 Heavy Duty Final Drive Assembly for Komatsu D375A

The 195-27-00740 and 195-27-00750 Heavy Duty Final Drive Assemblies are precision-engineered propulsion units specifically designed for the Komatsu D375A-5E0 crawler dozer in the 70-80 ton class. Each assembly integrates a high-displacement axial piston motor with a reinforced four-stage planetary gear reduction system, engineered to deliver exceptional torque output at the sprocket while withstanding continuous heavy shock loads encountered in mining and large-scale earthmoving operations.

These Komatsu D375A-5E0 dozers operate across diverse global environments, and our final drives are specifically optimized for regional conditions:

• Australia & South America Mining: Features upgraded dual-cone floating seals and hardened wear sleeves to resist abrasive silica dust and thermal cycling in open-pit mining applications
• North America & Europe Large Infrastructure: Incorporates deep-case carburized gear sets for extended fatigue life during heavy ripping and long-distance dozing in rocky terrain
• Southeast Asia & Africa Brownfield Projects: Utilizes corrosion-resistant coatings and optimized breather valve geometry to prevent moisture ingress and oil emulsification in high-humidity environments

• Case Drain Line Integrity: Ensure the motor case drain line is routed independently and remains unobstructed; excessive back pressure will cause output shaft seal failure. Monitor return filter for metallic debris every 500 hours.
• Gear Oil Change Protocol: Replace planetary gear oil every 250 hours for initial break-in, then every 500 hours or quarterly (use SAE 80W-90 or Komatsu specified gear oil). Inspect drained oil for copper or steel particles indicating bearing or gear surface wear.
• Sprocket Hub Bolt Replacement: Always install new bolts with high-strength thread locker upon reassembly. Tighten in a diagonal sequence to the specified torque of 1,250 ± 50 N*m.
• Pre-Start Lubrication Procedure: Before initial startup after installation or extended downtime, fill the motor housing completely with clean hydraulic oil through the case fill port until oil weeps from the drain port. This prevents dry startup and eliminates the risk of piston slipper seizure.

Guangzhou Tieqi Construction Machinery Co., Ltd. (IRON CAVALRY) is strategically located in Guangzhou's Huangpu District. With nearly 15 years of experience, we specialize in engineering machinery hydraulics and are committed to delivering practical solutions and upholding our responsibilities.

Our efficient execution and rigorous manufacturing approach ensure our products meet over 95% of original performance specifications. This commitment has built widespread trust in the industry.

We maintain 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 particular expertise in large mining excavator components and hard-to-find items.

For large items, we use sturdy plywood crates secured with metal fasteners. Products are cushioned with bubble wrap and secured with wooden braces, with special attention given to protecting vulnerable parts. External reinforcement includes high-strength PET plastic strapping and waterproof wrapping.

• One-stop solution provider for all hydraulic component needs
• High-quality products at competitive prices
• Exceptional customer service and support
• Large inventory, short delivery times, and long warranty periods
• Professional expertise with accurate part number identification