Precision-Engineered 195-27-00900 Final Drive for Komatsu D375A-6R D375A-6 Mining Dozer | High-Capacity Planetary Reduction Gearbox

The Final Drive Gearbox (Part No. 195-27-00900) for the Komatsu D375A-6R dozer is an ultra-heavy-duty travel propulsion assembly engineered for large-scale open-pit mining, land reclamation, and heavy earthmoving applications in the 70-80 ton machine class. This unit integrates a high-displacement axial piston hydraulic motor with a rugged multi-stage planetary reduction gearbox, delivering immense tractive effort and reliable travel performance under continuous high-load conditions.

The Komatsu D375A-6R dozer is deployed across the world's most demanding heavy industries. Our final drive gearbox is regionally optimized to meet specific operational challenges:

• North America & South America: Engineered for large-scale open-pit mining, coal overburden removal, and heavy infrastructure projects, with reinforced housing and enhanced sealing to withstand extreme temperature variations, abrasive materials, and continuous high-cycle operation.
• Australia & Oceania: Equipped with heavy-duty floating seals that resist ingress of highly abrasive quartz-rich soils, red dust, and laterite materials common in iron ore and coal mining environments.
• Africa & Middle East: High-temperature seals and corrosion-resistant materials protect against sand erosion, thermal stress, and airborne particulate contamination in arid desert and semi-arid mining regions.

• Ultra-High Torque Capacity: The large-displacement axial piston motor delivers exceptional starting torque and smooth power transmission, enabling the D375A-6R to push heavy loads on steep mine ramps, soft overburden, and uneven bench floors.
• Heavy-Duty Multi-Stage Planetary Reduction: The gearbox employs case-hardened alloy steel planetary gears with precision-ground tooth profiles, ensuring uniform load distribution across multiple stages and maximizing service life between major rebuilds.
• Precision OEM Replacement Fit: All mounting bolt patterns, pilot diameters, spline connections, and hydraulic port locations match original Komatsu specifications for the D375A-6R model, enabling seamless installation with minimal machine downtime.
• Mining-Grade Structural Integrity: The ductile iron housing features massive reinforced ribbing and stress-relieved construction to resist structural fatigue under continuous shock loading from dozing and ripping operations. Dual-cone floating seals with heavy-duty dust wipers provide robust protection against contamination in the harshest environments.

1. Hydraulic System Care: Routinely inspect case drain lines for restrictions, kinks, or blockages. A restricted drain line can generate excessive back pressure, leading to catastrophic motor rotary group failure. Maintain strict hydraulic fluid cleanliness standards and replace return filters at intervals prescribed for heavy mining equipment.
2. Gear Oil Management: Fill the planetary housing with the recommended extreme-pressure gear oil of the correct viscosity grade for heavy-duty dozer applications. Change the oil every 250-500 operating hours under normal conditions, and every 250 hours in severe applications such as continuous ripping, push-loading, or heavy dozing. Perform regular oil sampling and analysis to detect metallic particles as an early indicator of gear or bearing degradation.
3. Mounting Bolt Protocol: When reinstalling the final drive gearbox, always fit new high-strength bolts meeting the specified grade. Apply a suitable thread locking compound to the bolt threads prior to torquing to factory specifications, preventing loosening caused by extreme vibration and shock loads during dozing and ripping cycles.
4. Pre-Operation Priming Procedure: Before initial startup or after final drive replacement, fill the motor housing with clean hydraulic oil to purge trapped air pockets. Run the machine at low idle for several minutes, cycling the tracks forward and reverse, to ensure complete lubrication of all planetary components before engaging heavy production loads.

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.

Manufacturing Facility Exterior

Factory Production Line

Trade Show Exhibition

Professional Team

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.

Secure Product Packaging Example

• 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