Rotary Mower Gearbox – Replacement of Comer Code LF140J
The rotary mower gearbox LF-140J, engineered by TEBSA in Argentina, is a powerhouse for rotary mowers used in cutting grass, weeds, and tough vegetation. Whether you’re tending to pastures, clearing farmland, or maintaining public green spaces, this gearbox delivers reliable power transmission to keep your mower running smoothly. Since 1997, TEBSA has crafted durable, high-performance agricultural solutions, offering a 100% quality guarantee and a 50% cost advantage over original brands.
Built with top-grade materials like cast iron GGG40, the LF-140J withstands the daily grind of agricultural work. Its 1:1.93 gear ratio drives the mower’s blades with ample force, while the 6-spline input shaft and 15-spline output shaft ensure compatibility with a wide range of rotary mowers. Designed for longevity and ease of use, this gearbox is a trusted choice for farmers and landscapers across Argentina’s Pampas and beyond.
Specifications of Rotary Mower Gearbox LF-140J
Product Description | Rotary Mower Gearbox - Replacement of Comer Gearbox LF-140J |
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Product details |
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Application range | Mowers |
Consists of |
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Contains oil | No |
Max. oil capacity | 1.4 l |
Max. oil change interval | 500 h |
Oil SAE viscosity grade | 80W-90 |
Housing material | Cast iron GGG40 |
Weight | 28.5 kg |
Gear arrangement Increasing | 3 |
Input power kW / HP Increasing | 44 / 60 kW/HP |
Input shaft Increasing | X |
Output Torque DaNm Increasing | 39 daNm |
Ratio Increasing | 1:1.93 |
Ratio Reducing | 1.93: 1 |
Shaft X | 1 3/8" (6) |
Shaft Z | ASA Z15 D.P. 8/16 |
Why Choose the LF-140J Rotary Mower Gearbox?
The LF-140J rotary mower gearbox stands out for its blend of strength, versatility, and value, making it a top pick for agricultural professionals in Argentina. Here’s what sets it apart:
Robust Power Delivery: With a 1:1.93 gear ratio and 44 kW (60 HP) input power, the LF-140J drives mower blades with precision and force. It handles tough vegetation like overgrown grass or thick weeds, ensuring clean cuts in fields from Buenos Aires to Mendoza.
Durable Construction: Made with cast iron GGG40, a material known for its toughness, this gearbox resists wear from daily use. TEBSA’s advanced manufacturing—think forging, heat treatment like carburization, and precision grinding—means it can take on Argentina’s rugged terrains.
Wide Compatibility: The 6-spline input shaft (1 3/8") and 15-spline output shaft (ASA Z15 D.P. 8/16) fit most rotary mowers, from small farm units to heavy-duty models. This flexibility suits diverse setups across Argentina’s farms.
Cost Savings: At 50% less than original brands like Comer, the LF-140J offers premium performance without the premium price. TEBSA’s strategic sourcing and lean production keep costs low while maintaining quality.
Low Maintenance: Designed for ease, the gearbox needs an oil change after 50-70 hours initially, then every 500-700 hours. Using 80W-90 oil (1.4 liters), it’s simple to keep in top shape, minimizing downtime.
Local Reliability: Built with Argentina’s farmers in mind, the LF-140J thrives in soybean fields, wheat pastures, or grassy plains. TEBSA’s team responds within 24 hours to any questions, ensuring you’re never stuck.
Feature | Benefit | Application |
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Cast Iron GGG40 Housing | Withstands heavy impacts and wear | Rough terrains like Pampas plains |
1:1.93 Gear Ratio | Strong blade torque for tough cuts | Thick grass, weeds, crop residue |
6/15 Spline Shafts | Fits multiple mower models | Small farms to large operations |
Applications of the LF-140J in Argentine Agriculture
The LF-140J rotary mower gearbox is a workhorse for Argentina’s agricultural sector, where diverse crops and landscapes demand reliable equipment. Its primary role is powering rotary mowers, which slice through grass, weeds, and crop residue with ease. Here’s how it fits into local farming:
Pasture Management: In regions like Córdoba or Santa Fe, where cattle grazing is big, the LF-140J keeps pastures tidy. It powers mowers to clear overgrown grass, promoting healthy regrowth for livestock.
Crop Residue Clearing: After harvesting soybean, wheat, or corn, fields often need cleaning. The LF-140J’s torque (39 daNm output) handles tough stalks and debris, prepping land for the next planting season.
Roadside and Public Maintenance: Beyond farms, the gearbox suits municipal tasks in cities like Rosario or Mendoza. It drives mowers to maintain parks, highway medians, and sports fields, ensuring neat, safe spaces.
Small and Large Farms: Its compatibility with various mowers makes it ideal for both family-run farms and large agribusinesses. Whether you’re cutting a few hectares or hundreds, the LF-140J delivers consistent results.
This gearbox is built for Argentina’s unique conditions—think dusty plains, humid summers, and uneven fields. Its cast iron housing shrugs off impacts from rocks or debris, while the spline shafts ensure smooth power transfer from tractor PTOs. For farmers buying rotary mower gearboxes online, the LF-140J is a dependable choice that balances performance and affordability.
Task | Crop/Landscape | Region | Gearbox Advantage |
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Pasture mowing | Grass | Córdoba | High torque for thick grass |
Crop residue clearing | Soybean, wheat | Pampas | Durable housing for debris |
Roadside maintenance | Public spaces | Rosario | Compatibility with mowers |
Maintenance and Installation Tips for the LF-140J
To get the most out of your LF-140J rotary mower gearbox, proper setup and care are key. TEBSA designs it for ease, but a few steps ensure it runs smoothly for years:
Installation: The gearbox arrives without oil, so fill it with 1.4 liters of 80W-90 oil before use. Check that the 6-spline input shaft aligns with your tractor’s PTO and the 15-spline output shaft matches your mower. Secure all bolts tightly and verify alignment to avoid vibrations.
First Use: Run the mower lightly for a few minutes to let the oil circulate. After 50-70 hours, drain and replace the oil to remove any initial debris from break-in.
Regular Maintenance: Change the oil every 500-700 hours or annually, whichever comes first. Inspect the gearbox for leaks, cracks, or wear on the spline shafts. Clean the input shaft and apply fresh grease to prevent corrosion, especially in Argentina’s humid climates.
Storage: If the mower sits idle during off-seasons, store the gearbox in a dry place. Drain the oil to avoid sludge buildup, and coat exposed metal with a rust inhibitor.
Troubleshooting: If you notice unusual noises or reduced power, check oil levels and shaft alignment. TEBSA’s engineering team responds within 24 hours to help with any issues.
By following these tips, you’ll keep the LF-140J in top shape, minimizing repairs and maximizing uptime. Its design supports quick maintenance, so you can focus on farming, not fixing.
About TEBSA and Our Agricultural Solutions
Since 1997, TEBSA has been a trusted name in Argentina’s agricultural sector, delivering high-quality gearboxes and machinery parts with a 100% quality guarantee. Based in Argentina, we understand the needs of local farmers—from small plots to sprawling estates. Our 50% cost advantage comes from smart manufacturing, using processes like forging, casting, and heat treatments like carbonitriding. With a team that answers queries in 24 hours, we’re here to keep your operations running smoothly.
Beyond the LF-140J rotary mower gearbox, TEBSA offers a wide range of agricultural gearboxes to suit your needs:
Rotary Cutter Gearboxes: Like the RC-61, ideal for heavy-duty cutting of crop residue and tough vegetation.
Fertilizer Spreader Gearboxes: For precise nutrient distribution in soybean or corn fields.
Post Hole Digger Gearboxes: Perfect for fencing or planting in Argentina’s varied soils.
Flail Mower Gearboxes: Designed for fine cutting in orchards or vineyards.
PTO Shafts: Durable power transfer solutions for tractors and implements.
Whether you’re in Buenos Aires, Santa Fe, or Mendoza, TEBSA’s products are built to tackle Argentina’s farming challenges. Contact us today to explore our full catalog or get a quote for the LF-140J rotary mower gearbox!
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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

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