CAT D6R III D6T Final Drive Group 265 2299 260 6650 | Heavy Dozer Planetary Reducer

The Final Drive Group Assembly (P/N 265-2299 / 260-6650) is the severe-duty planetary reduction system engineered for Caterpillar’s 20-ton class track-type tractors. Built specifically to handle the high torsional loads of the D6R Series III and D6T fleets, this unit converts engine power into raw drawbar pull. Whether your machine is configured as a standard tractor or a wide-track D6R XW (Extra Wide) or LGP setup, this heavy-duty planetary gearbox delivers synchronized tracking and aggressive blade pushing power under the most demanding site conditions.

Eliminating High Dealer Margins and Core Exchange Hassles On medium-class dozers, the final drive is the ultimate mechanical boundary between engine horsepower and the ground. For machines equipped with the XW (Extra Wide) undercarriage, this component undergoes even higher stress. Wider track shoes create a longer lever arm, which exerts massive bending and twisting forces on the final drive housing during counter-rotations and side-slope grading. If your machine is drifting off-grade or producing a metallic chatter under load, your planetary system is likely bypassing ideal clearances.

Our premium replacement final drive gearboxes are engineered to handle the specific geometric loads of wide-track configurations without premature housing deflection. Because unexpected downtime can cost thousands of dollars per day, every unit is sold as an outright purchase with zero core exchange charges. You keep your old unit for scrap credit or salvage, avoiding the hassle of freight back-charges and strict OEM core criteria.

• North America & Europe: Ideal for Heavy Civil Infrastructure and Commercial Site Development where D6T and D6R III machines run long cycles and require perfect straight-line tracking for GPS-guided finish grading.

• Southeast Asia & Oceania: Configured with heavy-duty mechanical floating seals that prevent fine silica sand, volcanic soil, and tropical mud from penetrating the gear oil cavity during harsh wet-season pioneering.

• CIS Regions & Middle East: Engineered with housing metallurgy that accommodates sharp thermal variations—preventing brittle cracking during freezing cold starts or seal degradation under intense desert ambient heat.

Critical Fitment Warning: Because CAT D6R III and D6T variants utilize different track frame widths and splash guards, ensure you provide your Machine Serial Number Prefix (e.g., WRG, GPE, THX) to our team before shipment to perform a 100% digital layout validation of your sprocket bolt holes.

• The System Flush Mandate: If the previous drive experienced a catastrophic fragmentation (a "meltdown"), fine metallic particles are now floating through the steering clutch and brake cooling circuit. You must flush the reservoir and replace the power train return filters. Failure to do so will introduce abrasive steel silt into the new assembly within the first 5 hours of operation.

• The High-Viscosity Lubrication Rule: Final drives are strictly shipped without oil due to freight regulations. Always use specialized premium CAT FDAO (Final Drive and Axle Oil) or its equivalent high-performance drivetrain lubricant. Never mix general hydraulic fluid or standard automotive gear oils into the 265-2299 housing.

• Sprocket Hardware Lifecycle: The massive torque generated by the D6 demands flawless segment fastener integrity. Never reuse old segment bolts because they experience structural stretching under load. Always install new Grade 12.9 hardware, torque strictly to factory specifications, and execute the final torque-turn sequence to avoid stripping the drive hub threads.

• S.O.S. Sampling & Magnetic Plugs: Draw final drive oil samples every 250 operating hours to monitor parts-per-million thresholds for iron and copper. Clean and analyze the lower magnetic drain plug at every oil change interval; if distinct metallic flakes or small chunking are found, stop operation immediately to protect the main planetary carriers.

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