Flail Mower Gearbox – Replacement of Comer Code T-269B 3:1
The T-269B flail mower gearbox, crafted by TEBSA in Argentina, is a cornerstone of heavy-duty agricultural machinery, designed to power flail mowers that shred grass, weeds, brush, and crop residue. Since 1997, TEBSA has been a trusted manufacturer, offering a 100% quality guarantee and a 50% cost advantage over original brands. This gearbox channels power from a tractor’s PTO to the mower’s blades, enduring the intense demands of Argentina’s diverse farmlands, from the Pampas to the fields of Córdoba.
Built with cast iron GGG40, the T-269B is engineered for durability, resisting wear in tough conditions like soybean or wheat harvesting. Its rugged design and precise forging ensure long-term reliability, while accessible oil ports make maintenance straightforward. For farmers in Buenos Aires or Mendoza, this gearbox delivers the strength and efficiency needed for pasture management, vineyard upkeep, or roadside clearing.
Technical Specifications and Design Features
The T-269B flail mower gearbox is a heavy-duty component tailored for agricultural tasks requiring high torque and resilience. Its 3:1 gear ratio optimizes power transfer, delivering up to 2005 Nm of output torque at a maximum input of 39 kW. With a cast iron housing, it withstands the vibrations and shocks of flail mowing, whether cutting dense brush or maintaining orchards in Argentina’s San Juan region.
The gearbox supports a 540 r/min input speed, ideal for standard tractor PTOs, and features three 1 3/8" (6-spline) shafts (X, Y, Z) for seamless integration with flail mowers. It holds 3.3 liters of 80W-90 oil, with a recommended change after 50 hours of initial use and every 500 hours thereafter. Weighing 36.5 kg, it balances strength and practicality for Argentine farmers.
Description | Flail Mower Gearbox - Replacement of Comer Gearbox T-269B (3:1) |
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Application | Various (agricultural) applications, Flail Mowers |
Consists of |
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Technical information |
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Max. input rotation speed | 540 r/min |
Max. input power | 39 kW |
Max. output torque | 2005 nm |
Contains oil | No |
Max. oil capacity | 3.3 l |
Max. oil change interval | 500 h |
Oil SAE viscosity grade | 80W-90 |
Housing material | Cast iron GGG40 |
Weight | 36.5 kg |
Gear arrangement | 33 - 34 |
Ratio | 3: 1 |
Input shaft | Z |
Shaft X | 1 3/8" (6) |
Shaft Y | 1 3/8" (6) |
Shaft Z | 1 3/8" (6) |
Applications and Benefits in Argentine Agriculture
The T-269B flail mower gearbox excels in a range of agricultural tasks across Argentina, from clearing overgrown pastures to preparing land for soybean or corn planting. Flail mowers equipped with this gearbox are versatile, handling everything from light grass cutting in Mendoza’s vineyards to heavy brush clearing in Chaco’s rugged terrains. Its 3:1 ratio ensures the blades spin at the right speed to shred vegetation efficiently, even in the humid subtropical climates of northern Argentina.
Farmers benefit from the T-269B’s robust construction, which holds up against rocks, stumps, and uneven ground. The cast iron GGG40 housing, treated with processes like carburization, resists corrosion and impact, making it a reliable choice for Argentina’s varied landscapes. With a 50% cost advantage, TEBSA’s T-269B offers the same performance as premium brands at a fraction of the price, helping farmers in Rosario or Salta stretch their budgets.
Maintenance is a breeze, thanks to accessible oil fill and drain ports. A quick oil change every 500 hours keeps the gearbox running smoothly, while TEBSA’s 24-hour response team is ready to answer questions about performance or upkeep. This gearbox also enhances safety, delivering steady power to prevent blade jams, which is critical for operators working long hours in Argentina’s fields.
Benefit | Details |
Cost Savings | 50% cheaper than original brands, with identical performance. |
Durability | Cast iron GGG40 with carburization for long life in tough conditions. |
Easy Maintenance | Accessible oil ports, 500-hour oil change interval. |
Versatility | Suitable for grass, weeds, brush, and crop residue in various terrains. |
Maintenance and Operational Tips for Longevity
To keep the T-269B flail mower gearbox performing at its best, regular maintenance is key. Start with an oil change after the first 50 hours of use, then every 500 hours using 80W-90 oil. Check the oil level monthly, especially during peak seasons like soybean planting in Argentina’s Santa Fe region. Inspect the gearbox for leaks or wear before each major job to catch issues early.
Lubricate the input shaft (Z) and ensure proper alignment with the PTO to avoid vibrations that could stress the gears. TEBSA’s forging and heat treatment processes, like carbonitriding, give the T-269B its toughness, but proper care extends its life even further. If you’re unsure about performance at different PTO speeds, TEBSA’s engineering team responds within 24 hours to guide you.
For farmers buying flail mower gearboxes online in Argentina, the T-269B is a direct replacement for Comer Code T-269B, ensuring compatibility with existing equipment. Its 36.5 kg weight makes it easy to install, and the lack of pre-filled oil allows you to choose the right lubricant for your climate, whether in the humid north or drier central regions.
Maintenance Task | Frequency |
Oil Change | First 50 hours, then every 500 hours |
Oil Level Check | Monthly |
Inspect for Leaks/Wear | Before major jobs |
Lubricate Input Shaft | As needed |
About TEBSA and Our Agricultural Solutions
Since 1997, TEBSA has been a leading manufacturer of agricultural gearboxes in Argentina, delivering reliable, cost-effective solutions with a 100% quality guarantee. Based in Argentina, we specialize in equipment that powers farms across the Pampas, Córdoba, and beyond. Our ISO9001-2015 certification reflects our commitment to excellence, while our 50% cost advantage and 24-hour response team make us a trusted partner for farmers and industrial users.
In addition to the T-269B flail mower gearbox, TEBSA offers a wide range of agricultural gearboxes, including rotary cutter gearboxes, fertilizer spreader gearboxes, lawn mower gearboxes, post hole digger gearboxes, rotary tiller gearboxes, corn headers gearboxes, fertilizer mixer gearboxes, feed mixer gearboxes, round baler gearboxes, irrigation reels gearboxes, manure spreader gearboxes, rotary rake gearboxes, and hay tedder gearboxes. We also supply PTO shafts for seamless power transfer. Contact us to explore our full lineup and find the right solution for your farm.
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A large portion of our products is exported to Europe and the Americas, with both standard and custom options available. We can manufacture according to your drawings or samples, using standard materials or as per your specific requirements. Choosing us means choosing reliability.

Materials Available
1. Stainless Steel: SS201, SS303, SS304, SS316, SS416, SS420
2. Steel:C45(K1045), C46(K1046),C20
3. Brass:C36000 ( C26800), C37700 ( HPb59), C38500( HPb58), C27200(CuZn37), C28000(CuZn40)
4. Bronze: C51000, C52100, C54400, etc
5. Iron: 1213, 12L14,1215
6. Aluminum: Al6061, Al6063
7.OEM according to your request

Surface Treatment
Annealing, natural canonization, heat treatment, polishing, nickel plating, chrome plating, zinc plating,yellow passivization, gold passivization, satin, Black surface painted etc.
Processing Method
CNC machining, punch,turning, milling, drilling, grinding, broaching, welding and assembly

QC & Certificate
Technicians self-check in production,final-check before package by professional Quality inspector
ISO9001:2008 , ISO14001:2001,ISO/TS 16949:2009
Package & Lead Time
Size: Drawings
Wooden Case/Container and pallet, or as per customized specifications.
15-25days samples. 30-45days offcial order
Port: Shanghai/Ningbo port

Industries We Service
