Views: 0 Author: Site Editor Publish Time: 2026-06-12 Origin: Site
Quick answer:
A final drive transmits engine power to the tracks, moving your excavator across any terrain. The best replacement matches your machine's part number, sprocket and frame holes, and build quality. BN final drives from HONGXIANG MACHINERY deliver heat-treated planetary gears, precise tolerances, and worldwide shipping for Caterpillar, Hitachi, Hyundai, and 600+ other models.
When an excavator stops moving, the problem often traces back to one component: the final drive. This gearbox carries the full force of the engine to the tracks, so a worn or failed unit brings an entire job site to a halt. Choosing a reliable replacement saves you both downtime and money.
This guide explains what a final drive does, how to pick the correct part for your machine, and why build quality matters more than price alone. You'll also see how HONGXIANG MACHINERY (BN brand) supports operators running Caterpillar, Hitachi, Hyundai, and dozens of other excavator brands.
A final drive is the last gear set in the powertrain. It takes rotation from the travel motor, reduces the speed, and multiplies the torque needed to move heavy machinery. Most units use a planetary gear system, where sun gears, planetary gears, and ring gears work together to handle massive loads.
These gears endure constant stress. According to HONGXIANG MACHINERY, planetary drive gears "must withstand the high forces of torque generated by the engine and transfer these loads to move the equipment." That's why manufacturing quality directly affects how long a unit lasts.
A well-built final drive caterpillar replacement uses heat-treated components to boost bending strength, prevent case crushing, and resist wear. Cut corners here, and the gearbox fails early under real working conditions.
Picking the wrong unit wastes time and money. To match a replacement to your excavator, check these details:
Part number: Found on the original unit or in your parts manual.
Equipment model: The exact machine series and generation.
Sprocket holes and frame holes: These bolt patterns must align with your machine.
Position: Confirm whether it mounts at the travel motor location.
Here's a quick reference showing how three popular BN units compare:
Equipment Model | Part Number | Stock Code | Sprocket Holes | Frame Holes |
CAT 320D / 323D / 325C / 325D / 329D | 267-6796 | 9201905HQ | 18 | 20 |
Hitachi ZX270 / ZAXIS270-3 | 9255880 / 9256990 | 9202148 | — | — |
Hyundai R215-9 / R225-9 / R210-7 | 31N6-40041 | 9208006 | 30 | 30 |
Matching these specs ensures the gearbox bolts straight onto your machine, ready to install without modification.
Caterpillar machines are among the most common on job sites worldwide, so spare parts demand stays high. The BN unit with part number 267-6796 fits the 320D, 323D, 325C, 325D, and 329D models. It arrives fully assembled, with the motor shaft and motor housing already installed—though the travel motor itself is sold separately.
Every component in this unit is produced in-house, arrives new and undamaged, and comes with a 90-day warranty. Packaging uses plywood cases free of fumigation, so the gearbox ships safely by sea, air, or carrier.
For operators running older or larger CAT machines, BN also stocks units for the E315C, E330, E336D, E374D, and many more. The full Caterpillar travel gearbox range covers both legacy and current models.
Hitachi ZAXIS excavators are built for endurance, and their travel devices need replacements that match. The BN unit with part numbers 9255880 and 9256990 fits the ZX270 and ZAXIS270-3. The same part numbers also serve the ZX280-5G, ZAXIS280-5G, ZX280-3, and ZAXIS280LC-3.
This hitachi final drive ships fully assembled and ready to install, minus the motor. It carries a 1,000-working-hour warranty and includes a complete planetary gear set with carriers, sun gears, ring gears, and needle bearings—all manufactured by HONGXIANG MACHINERY.
If you run smaller or larger Hitachi machines, BN also produces travel devices for the EX120-5, ZX120, ZX200-3, ZX330, ZX450, ZX650, and more.
Hyundai's R-series excavators are popular for their balance of power and value. The BN travel gearbox with part number 31N6-40041 fits the R215-9, R225-9, and R210-7. With 30 sprocket holes and 30 frame holes, it bolts directly to these machines.
This hyundai final drive comes complete with the motor shaft and housing pre-installed, ready for the travel motor. Like all BN units, it's built from in-house components, arrives new, and includes a 90-day warranty plus fumigation-free plywood packaging.
A cheap gearbox that fails after a few hundred hours costs far more than a quality unit that lasts years. HONGXIANG MACHINERY backs its BN final drives with three decades of engineering experience and several manufacturing strengths:
In-house production: With an 18,000 m² factory and 80+ advanced machines, BN controls quality at every step.
Experienced engineering: Eight senior engineers bring more than 30 years of design and machining expertise.
Heat-treated gears: The process increases bending strength and wear resistance for a longer service life.
Wide compatibility: BN matches 600+ construction machinery models with 12,000+ parts.
Global reach: The company exports to Southeast Asia, the Middle East, the Americas, Europe, and Russia.
Choose a quality replacement if uptime and durability matter more than the lowest upfront cost—which, for most working operators, they do.
A failed final drive doesn't have to mean days of lost work. By matching the correct part number, sprocket holes, and frame holes—then choosing a manufacturer that builds for durability—you protect both your machine and your schedule.
HONGXIANG MACHINERY (BN brand) has supplied excavator transmission parts since 2000, serving operators across more than a dozen brands. To find the right unit for your machine, browse the full travel reduction gearbox range or contact the team directly for a quote.
Each BN final drive arrives fully assembled and ready to install, with the motor shaft and motor housing already fitted. The travel motor is sold separately. Units come new, undamaged, and packed in fumigation-free plywood cases.
No. BN final drive gearboxes ship without the travel motor, though the motor shaft and motor housing are pre-installed on most units. You can add the motor based on your machine's needs.
Warranty terms vary by product. Caterpillar and Hyundai units typically carry a 90-day warranty, while certain Hitachi travel devices come with a 1,000-working-hour warranty. Confirm the exact terms before ordering.
Stock units take 4–7 days for processing and packing. Bulk production runs 10–35 days depending on quantity. Delivery is available worldwide by sea, air, or carrier.
Provide your part number, part name, machine model, and quantity. HONGXIANG MACHINERY will quote the best price, confirm the order, and prepare the goods with full shipping documentation.
