CAT D6R D6T Final Drive Group 260 6655 | Heavy Dozer Planetary Reducer 260 6650 / 3W 6493 / 7G 5532

The Final Drive Group Assembly (P/N 260 6655) is the ultimate torque-delivery reducer engineered for Caterpillar’s high-production 20-ton class track-type tractors. Built specifically to handle the structural loads of the D6R and D6T fleets, this unit converts engine power and hydraulic flow into raw drawbar pull. Whether your machine is configured as a standard, an extended track XL, or a wide-track XW / LGP setup, this heavy-duty planetary gearbox ensures synchronized tracking and aggressive blade pushing power under severe material conditions.

Eliminating High Dealer Margins and Core Exchange Hassles In the earthmoving sector, a final drive is the operational bottleneck of your entire asset. If your operator reports a rhythmic "clicking" sound under load or if the dozer is "creeping" to one side when cutting a grade, internal gear spalling or micro-welding has already begun. The 260 6655 final drive group manages intense continuous loading while multiplying engine horsepower into massive tractive effort.

Our premium replacement final drive gearboxes are engineered to eliminate the high margins of OEM dealers while avoiding the risks of cheap casting alternatives. We understand that downtime costs thousands of dollars per hour, which is why every unit is shipped as an upfront, outright purchase with zero core exchange charges—allowing you to keep your old core for salvage or scrap credit without freight back-charges.

• North America & Europe: Ideal for Civil Infrastructure, Commercial Site Prep, and Rental Fleets where machines face relentless duty cycles and strict grading criteria. Ready for direct integration into modern high-pressure systems.

• 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 D6T variants (such as the D6T XL versus the D6T XW) utilize different track frame widths, ensure you provide your Machine Serial Number Prefix (e.g., S6X, THX, B6Y) 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 260 6655 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