Caja de engranajes para esparcidora de fertilizante L-25J, relación 1:3, repuesto para caja de engranajes Comer L-25J

The L-25J Fertilizer Spreader Gearbox Ratio 1:3 Replacement for Comer L-25J Gearbox, also known as a fertilizer distributor gearbox, is an essential component of agricultural machinery specifically engineered for soil preparation, crop treatment, and fertilizer spreading tasks. Centrally positioned within the spreading unit, it efficiently transmits power from the tractor's power take-off (PTO) shaft to the spinning discs or augers that evenly distribute fertilizer, lime, seed, or granular materials across cultivated land. Designed to handle demanding fieldwork conditions, this agricultural gearbox features a rugged aluminium housing that is both lightweight and corrosion-resistant, delivering outstanding durability with a total weight of just 4.1 kg. Its 1:3 step-up ratio converts tractor PTO speed into the higher rotational velocity required for efficient and uniform spreading, making it one of the most practical fertilizer spreader gearboxes available for modern farming operations.

Rated at a maximum input power of 5 kW and a maximum input rotation speed of 540 r/min, this gearbox for fertilizer spreader applications is engineered with a series of precision-machined gears and shafts that optimise rotational speed and output torque to meet diverse spreading requirements. With a max output torque of 30 N·m and compatibility with standard 1-3/8 inch 6-spline PTO connections, it offers seamless integration into a wide variety of tractor-mounted spreaders. Beyond fertilizer distribution, its robust design makes it equally suitable for mowers, multi-row rotary tillers, band saws, and various other agricultural implement applications. The gearbox is supplied dry (without oil), using SAE 90EP gear oil with a maximum capacity of 0.35 L, and features a scheduled oil-change interval of 500 hours, or at least once annually, ensuring low-maintenance operation and long service life across intensive seasonal use.

Parámetros técnicos

Hemos completado una auditoría externa de proveedores y una verificación de la empresa con el apoyo de SGS/TÜV Rheinland. Esta verificación permite a los compradores revisar la identidad de la empresa, sus operaciones comerciales, su perfil y su capacidad general de fabricación. Se pueden proporcionar informes de inspección específicos del producto, documentación de materiales o registros de cumplimiento según los requisitos del pedido.

Cantidad mínima de pedido (MOQ): Se puede configurar de forma flexible en función del tipo de producto y la cantidad del pedido.

Muestras: Los nuevos clientes pueden solicitar entre 1 y 5 muestras en las circunstancias adecuadas.

Pedidos mixtos: Se admite la combinación de diferentes modelos; el importe total del pedido debe alcanzar aproximadamente $1,500.

Pedidos pequeños: Se admiten pedidos a partir de 1 o 2 unidades, pero el precio unitario será relativamente más alto.

Plazo de entrega: De 10 a 25 días laborables para piezas estándar; de 20 a 45 días laborables para componentes personalizados; de 45 a 120 días laborables para equipos de proyecto.

Términos comerciales: Los términos EXW, FOB, CIF y DAP son generalmente aceptados; los términos FCA, CFR, CPT, CIP y DDP pueden negociarse específicamente.

Dimensiones de la caja de engranajes del esparcidor de fertilizantes L-25J

Key Features of the L-25J Fertilizer Spreader Gearbox 1:3

1. PTO Interface & Spline Compatibility
The L-25J input shaft is machined to match the standard 1-3/8 inch 6-spline (Z6) tractor PTO interface, the most widely used connection in global agricultural machinery. This precise spline compatibility prevents vibration, eliminates misalignment risk, and significantly reduces wear on both the gearbox and the connecting PTO driveline shaft. The result is smooth, consistent power delivery from the tractor to the spreading mechanism throughout the entire operational cycle.

2. Optimised 1:3 Gear Ratio for Spreading Performance
The 1:3 step-up ratio is specifically calibrated to convert the tractor PTO's 540 RPM input into the higher rotational speed required by fertilizer spreading discs and agitators. This ratio ensures that spinner discs rotate at the ideal RPM for wide, even distribution of granular fertilizer, lime, seed, and other materials. The precise ratio configuration directly impacts spreading width uniformity, helping operators achieve consistent field coverage and reduce input material waste during every spreading pass.

3. Construcción de aluminio resistente a la corrosión.
Fertilizers, lime, and agrochemicals are chemically aggressive and can cause rapid corrosion of unprotected metal components. The L-25J features a precision die-cast aluminium housing that offers an inherently corrosion-resistant surface, significantly outperforming uncoated steel in fertilizer environments. Combined with high-durability oil seals and sealed bearings, the housing prevents chemical ingress during extended spreading operations, protecting the internal gear train and ensuring the long service life expected from a professional-grade agricultural gearbox for fertilizer spreader duty.

4. Versatile Disc and Agitator Drive Integration
The L-25J is designed for direct integration into centrifugal disc-type fertilizer spreaders, transmitting drive to the main spinning discs that broadcast fertilizer across the field. Its output shaft configuration also supports integration with agitator systems in hopper-type spreaders, where an agitator prevents bridging or blockage of granular materials, maintaining a steady, uninterrupted flow to the spinning disc. This dual-function capability makes the gearbox compatible with a broad range of single-disc and twin-disc spreader designs found across the global market.

5. Wide Range of Agricultural Applications
Beyond its primary fertilizer spreading role, the L-25J's robust construction and standardised PTO interface make it a versatile power transmission component across multiple agricultural machinery categories. It is confirmed suitable for mowers, multi-row rotary tillers, and band saws, and its performance characteristics align well with a broad range of field-mounted, PTO-driven implements. As one of the leading fertilizer spreader gearbox manufacturers, CMN Transmission ensures that each unit undergoes full quality verification before shipment, guaranteeing operational reliability whether used in grain farming, horticulture, turf management, or soil amendment applications.

6. Field-Ready Serviceability and Lubrication Access
Routine maintenance in the field demands accessible service points, and the L-25J delivers with clearly positioned fill, drain, and level check plugs that make oil servicing straightforward without requiring specialised tools or removing the gearbox from the machine. The first oil change is scheduled at 50-70 operating hours, followed by standard intervals of 500-700 hours or annually, using SAE 90EP gear oil. The compact 0.35 L oil capacity minimises lubricant cost while maintaining full lubrication of the internal gear set and bearings throughout extended operational periods.

Principio de funcionamiento

Power enters the L-25J through the input shaft, which is engineered with a standard 1-3/8 inch 6-spline profile to mate directly with the tractor's 540 RPM PTO driveline. As the tractor engine runs, rotational energy travels through the PTO shaft and driveline coupling into the gearbox input. The input shaft is supported by precision-grade bearings that absorb radial and axial loads generated during operation, ensuring smooth torque transfer with minimal vibration even during field operation over uneven terrain. This direct mechanical connection is the foundation of reliable, loss-free power delivery to the spreading mechanism.

Inside the aluminium housing, the input shaft drives a precision bevel gear set that converts the rotational axis from the PTO's horizontal alignment to the vertical or angular output axis required to drive the fertilizer spreading disc. The 1:3 step-up ratio means that for every revolution of the input shaft, the output shaft rotates three times, increasing the rotational speed to the level required for effective broadcast spreading. The tooth geometry and heat treatment of the bevel gears are designed for smooth, low-noise meshing under the torque loads generated during continuous fertilizer spreading operations. This gear set is the mechanical heart of the fertilizer gearbox and is the primary determinant of spreading speed and distribution width.

The gearbox output shaft, with a 22 mm outside diameter, delivers the converted rotational motion directly to the spreading disc or auger. At a maximum output torque of 30 N·m, the L-25J provides sufficient rotational force to drive standard centrifugal spreading discs even when handling dense, heavy granular materials such as coarse limestone or fertilizer blends. The output connection is secured to the disc hub via the shaft fitting, and the compact shaft geometry allows for integration into the tight mechanical envelope typical of mounted fertilizer spreader designs. This direct, shaft-to-disc drive delivers high mechanical efficiency compared to belt or chain-driven alternatives.

The internal gear set and bearings are lubricated by an oil-bath system using a maximum of 0.35 L of SAE 90EP gear oil. This splash lubrication ensures that all rotating and meshing surfaces receive a continuous film of lubricant during operation, dramatically reducing friction-induced wear and heat generation. The oil also functions as a thermal buffer, absorbing and dissipating heat generated by gear meshing loads. High-quality oil seals at both the input and output shaft locations prevent lubricant leakage and exclude dust, moisture, and fertilizer dust from the gear chamber. First-fill oil is not included; operators must add the correct grade prior to initial commissioning, and the first oil change is scheduled at 50-70 operating hours to flush initial break-in wear particles from the system.

The die-cast aluminium housing provides the structural framework that maintains precise gear alignment under the dynamic loads of field operation. Four M11 bolt holes on a 108 mm x 108 mm mounting pattern allow the gearbox to be securely bolted to the spreader frame, preventing movement or deflection under operating loads. The housing's ribbed external geometry provides additional stiffness without adding unnecessary weight, keeping the total gearbox mass at 4.1 kg. This low weight reduces the overall implement weight and the forces exerted on the tractor's three-point hitch linkage, improving tractor stability during headland turns and transport between fields. The aluminium material's inherent resistance to fertilizer chemical attack further enhances structural longevity in the harsh operating environment of fertilizer spreading.

Applications of the L-25J Fertilizer Distributor Gearbox

Pasos de instalación

1. Safety Preparation and Equipment Check
Before starting any installation work, ensure the tractor is switched off, the PTO is fully disengaged, and the parking brake is applied. Allow all rotating components on the spreader to come to a complete stop before approaching the gearbox mounting area. Gather the required tools including an appropriately rated torque wrench, spanner set, and cleaning rags. Confirm that the replacement L-25J gearbox matches the original Comer L-25J specifications by checking the ratio, shaft sizes, and bolt pattern dimensions against the spreader manufacturer's documentation before proceeding.

2. Retire la caja de cambios antigua.
Disconnect the PTO driveline shaft from the gearbox input by releasing the quick-release collar or removing the connecting hardware as appropriate for the spreader design. Remove the spreading disc from the output shaft by unfastening the disc retaining bolts or circlip. Drain the old gearbox oil by removing the drain plug and disposing of the used oil according to local environmental regulations. Once the oil is drained and the shaft connections are free, remove the four mounting bolts that secure the gearbox to the spreader frame and carefully extract the old gearbox unit from its mounting location.

3. Clean the Mounting Area and Inspect
With the old gearbox removed, thoroughly clean the spreader's mounting bracket and the surrounding area of any residual oil, fertilizer dust, and corrosion. Inspect the mounting bracket for cracks, deformation, or damaged threads that could compromise the security of the replacement gearbox. Verify that the four mounting bolt holes are clean and undamaged. Check the PTO driveline shaft for wear or damage at the spline section, and replace the driveline coupling or PTO shaft if significant wear is evident, as a worn driveline connection will reduce the service life of the new gearbox input shaft spline.

4. Mount the New L-25J Gearbox
Position the new L-25J gearbox onto the spreader mounting bracket, aligning the four M11 bolt holes with the corresponding holes in the bracket. Insert the mounting bolts and tighten them progressively in a cross pattern to ensure even clamping load and to prevent the housing from distorting as the bolts are torqued. Tighten to the torque value specified in the spreader manufacturer's documentation. Confirm that the gearbox sits flush and secure against the mounting surface with no gaps or movement before proceeding to shaft connection steps.

5. Connect the PTO Driveline Shaft
Slide the PTO driveline shaft coupling onto the L-25J input shaft, ensuring the 1-3/8 inch 6-spline profile fully engages and the quick-release locking collar clicks securely into its retaining groove. Verify that the driveline shaft is at the correct operating angle and that the shaft telescopes within its designed operating range at the working attachment angle. Excessive driveline angles or inadequate telescoping overlap can cause vibration, premature wear, and gearbox damage. Where required, check that the PTO shaft guard is in good condition and correctly fitted over the entire exposed length of the driveline.

6. Fill with SAE 90EP Gear Oil
The L-25J is supplied dry without oil. Before operation, remove the oil fill plug and add clean SAE 90EP gear oil up to the level indicated by the level plug or sight indicator, taking care not to exceed the maximum capacity of 0.35 L. Over-filling can cause excessive internal oil churning, overheating, and oil seal failure. Use only the specified SAE 90EP grade to ensure correct viscosity for the operating speed and temperature range of the gearbox. Reinstall the fill plug securely, wipe the housing clean, and check for any immediate leakage at the fill plug and oil seal locations before proceeding to the initial run-in check.

7. Refit Spreading Disc and Conduct Initial Run Check
Refit the spreading disc to the gearbox output shaft, securing it with the correct retaining hardware to the manufacturer's specified torque. With the spreader positioned safely away from personnel, start the tractor and engage the PTO at low speed to perform an initial run-in check. Observe the gearbox for any unusual noise, vibration, or oil leakage during the first five minutes of operation. Gradually increase to normal operating PTO speed and confirm smooth, consistent disc rotation. After the initial 50-70 operating hours, perform the first oil change to flush any metal particles from the break-in period, then continue with standard 500-hour oil change intervals.

Fertilizer Spreader Gearbox vs. Rotary Tiller Gearbox

Tabla comparativa:

Caja de engranajes y eje de transmisión de la toma de fuerza del esparcidor de fertilizante

Fertilizer spreader gearboxes and PTO driveline shafts are the two primary mechanical components that together form the complete power transmission chain from the tractor engine to the fertilizer spreading disc.

The L-25J fertilizer spreader gearbox receives rotational power from the tractor PTO and performs two critical functions: it changes the direction of the power transmission axis from the PTO's longitudinal alignment to the vertical or angular output axis needed to drive the spreading disc, and it applies the 1:3 step-up ratio to increase rotational speed from the PTO's 540 RPM input to the higher disc speed required for effective broadcast spreading. The gearbox's aluminium housing protects the internal bevel gear set and bearings from the corrosive fertilizer environment while maintaining the precise shaft alignment necessary for efficient, low-loss power transmission. Together, these functions convert the tractor's mechanical power into the specific speed and torque combination that determines spreading performance, application width, and distribution uniformity.

A PTO shaft, also referred to as a Power Take-Off shaft, is the mechanical drivetrain component that transfers rotational power from the tractor's PTO output yoke to the implement's gearbox input. Rather than requiring every piece of farm machinery to carry its own engine, the PTO shaft enables a single tractor to power a wide range of implements including rotary tillers, flail mowers, wood chippers, balers, and fertilizer spreaders. The PTO shaft consists of two universal joints connected by a telescoping tube assembly that accommodates the changes in length and angle that occur as the implement follows ground contours relative to the tractor during field operation. A safety guard surrounding the rotating shaft prevents contact with the spinning components and is a mandatory requirement under agricultural safety legislation in most countries.

The connection between the PTO shaft and the gearbox is made at the L-25J's input spline, where the PTO shaft's female coupling slides onto the gearbox's 1-3/8 inch 6-spline input stub shaft. The quality and condition of this connection directly affects gearbox longevity: a worn, misaligned, or incorrectly rated PTO shaft imposes additional vibration, impact loads, and misalignment forces on the gearbox input bearings and housing, dramatically accelerating wear and reducing service life. For this reason, CMN Transmission recommends always pairing the L-25J gearbox replacement with a thorough inspection of the PTO driveline shaft, and replacing any component showing signs of excessive wear, spline damage, or universal joint looseness to protect the new gearbox investment.

CMN Transmission supplies a comprehensive range of PTO driveline shafts, universal joints, yokes, and torque-limiting devices designed to complement our fertilizer spreader gearboxes. Selecting matched CMN PTO components ensures dimensional and performance compatibility, simplifies sourcing, and provides a complete drivetrain solution with consistent quality standards across every component in the power transmission chain from the tractor to the spreading disc.

Correct Lubrication of the L-25J Fertilizer Gearbox

1. Use the Correct Oil Grade
The L-25J must be filled with SAE 90EP (Extreme Pressure) gear oil, a mineral-based lubricant formulated with extreme pressure additives that protect the bevel gear tooth flanks under the high contact pressures generated during gear meshing. Do not substitute with engine oil, hydraulic oil, or lighter gear oils, as these lack the EP additive package needed to prevent gear scuffing and surface fatigue. Using the wrong fertilizer spreader gearbox oil grade will result in premature gear wear and potential gearbox seizure within a single spreading season. EP 90 gear oil is widely available from agricultural equipment dealers and lubricant suppliers globally.

2. Maintain the Correct Oil Level
Before each spreading season and periodically during intensive use, check the fertilizer spreader gearbox oil level by removing the level plug with the gearbox in its operating orientation. Oil should be visible at or just below the level plug thread. The maximum oil capacity is 0.35 L; do not overfill, as excess oil creates churning resistance, raises operating temperature, and can cause seal failure and leakage. Insufficient oil level leaves gear surfaces and bearings inadequately lubricated, leading to accelerated wear. A simple pre-season oil level check takes less than two minutes and can prevent a costly mid-season gearbox failure.

3. Perform the First Oil Change at 50-70 Hours
A critical and often overlooked step for a new or replacement gearbox is the early first oil change, specified at 50-70 operating hours for the L-25J. During the initial break-in period, the gear tooth surfaces and bearing contact tracks undergo micro-smoothing, generating fine metallic wear particles that become suspended in the oil. These particles act as an abrasive if left in the system. Draining and replacing the oil at 50-70 hours removes these particles before they can cause accelerated wear on the hardened gear and bearing surfaces. This early oil change is strongly recommended and will significantly extend the service life of the replacement gearbox.

4. Follow the 500-Hour Change Interval
After the initial early oil change, subsequent oil changes are scheduled at 500-700 operating hours, or at minimum once per year, whichever occurs first. In seasonal agricultural operations, an annual oil change at the end of the spreading season ensures that degraded oil containing moisture contamination and wear particles is replaced with fresh lubricant before the gearbox is stored for the off-season. Oil that has been thermally cycled through repeated heating and cooling absorbs moisture from condensation, which dilutes the EP additive package and promotes internal corrosion of the gear and bearing surfaces. Consistent adherence to the oil change schedule is the single most important maintenance action for maximising gearbox service life.

5. Check Seals and Inspect for Leakage
During every oil level check or oil change, visually inspect the gearbox housing, input and output shaft oil seals, and plug threads for any signs of oil leakage. Even minor oil seepage indicates a deteriorating seal or a loose plug, both of which will lead to accelerating oil loss and lubricant starvation if not addressed promptly. In fertilizer spreading applications, fertilizer dust can accumulate around oil seal lips and accelerate seal wear if not periodically cleaned away. Wipe the housing and seal areas clean with a dry cloth before inspecting for seepage, so that fresh leakage can be clearly identified against a clean surface.

6. Post-Season Storage and Lubrication Preparation
At the end of each spreading season, before placing the spreader in storage, drain the used gear oil from the L-25J and refill with fresh SAE 90EP to the correct level. This practice prevents moisture-contaminated oil from remaining in contact with the gear surfaces during the storage period, during which condensation and temperature cycling can cause significant internal corrosion. Clean the exterior of the gearbox housing with a dry brush or cloth to remove fertilizer crust deposits that retain moisture against the housing surface. Store the spreader in a dry, covered location if possible. At the start of the next season, recheck the oil level and the condition of all seals before recommissioning the spreader for field operation.

¿Por qué elegir las cajas de engranajes para esparcidoras de fertilizantes de CMN Transmission?

Korea CMN Transmission Co., Ltd. was established in 2000 and is located in Sandan-o, Danwon-gu, Ansan-si, Gyeonggi-do, Korea. With over 100 dedicated factory employees, CMN Transmission operates as a vertically integrated manufacturer focused on the research and development, manufacturing, quality assurance, sales, and after-sales service of agricultural gearboxes for the global market. Over more than two decades of continuous operation, CMN Transmission has grown into a recognised and trusted supplier within the global agricultural gearbox industry, building its reputation on consistent product quality, technical accuracy, and reliable international delivery performance.

Our comprehensive product range covers the full spectrum of agricultural power transmission requirements, including rotary cutter gearboxes, rotary tiller gearboxes, feed mixer gearboxes, rotary mower gearboxes, fertilizer spreader gearboxes, flail mower gearboxes, post hole digger gearboxes, round baler gearboxes, square baler gearboxes, disc mower gearboxes, centre pivot irrigation gearboxes, hydraulic drive gearboxes, silage machine gearboxes, orchard sprayer gearboxes, rotary rake gearboxes, combine harvester gearboxes, grain storage gearboxes, grain transportation gearboxes, corn header gearboxes, cutting bar gearboxes, and poultry feeding gearboxes. Our custom agricultural gearbox capability covers nearly one thousand specifications, and we support custom production based on customer drawings and samples to meet specific OEM and application requirements.

Beyond gearboxes, our product range extends to PTO shafts, universal joints, yokes, telescoping tubes, torque limiters, safety covers, shaft adapters, flexible couplings, bearings, tiller blades, drive chains, and sprockets - enabling CMN to serve as a one-stop agricultural drivetrain component supplier for OEM manufacturers and international distributors. With an annual production volume exceeding 500,000 units, we have the manufacturing scale and operational consistency to fulfil large-volume OEM orders alongside standard aftermarket supply requirements.

All CMN products are manufactured and quality-controlled under CE and ISO 9001 certified management systems, ensuring that every gearbox leaving our factory meets the dimensional, material, and performance specifications required by our global customer base. Our fertilizer spreader gearboxes are exported to and trusted by agricultural professionals in the United States, Canada, Mexico, Brazil, Argentina, France, Germany, Italy, Spain, the United Kingdom, Russia, India, Thailand, Vietnam, Turkey, Australia, New Zealand, and more than 60 additional destination countries worldwide. This global reach reflects our ability to provide consistent technical solutions for agricultural machinery partners operating across diverse farming environments, climatic conditions, and crop production systems.

Preguntas frecuentes

Q: Is the CMN L-25J a direct drop-in replacement for the Comer L-25J gearbox?
A: Yes. The CMN L-25J has been engineered as a direct replacement for the Comer L-25J fertilizer spreader gearbox. It matches the original Comer specifications including the 1:3 gear ratio, 1-3/8 inch 6-spline (Z6) input shaft, 22 mm output shaft diameter, 4-bolt mounting pattern on 108 mm x 108 mm centres, and the same aluminium housing weight of 4.1 kg. No frame modification, adapter plates, or driveline changes are required for a standard like-for-like replacement on spreaders originally designed for the Comer L-25J.

Q: What oil should I use in the L-25J fertilizer spreader gearbox?
A: The L-25J requires SAE 90EP (Extreme Pressure) gear oil. This is a mineral-based lubricant containing extreme pressure additives that protect the bevel gear tooth flanks under high contact loads. The correct fertilizer spreader gearbox oil grade is widely available from agricultural equipment dealers and lubricant suppliers. The maximum fill capacity is 0.35 L. Do not use engine oil, hydraulic oil, or gear oils without the EP additive classification, as these will not provide adequate protection for the hardened bevel gear surfaces and will lead to accelerated wear.

Q: What does the 1:3 fertilizer spreader gearbox ratio mean for spreading performance?
A: The fertilizer spreader gearbox ratio of 1:3 means that for every one revolution of the input shaft (driven by the tractor PTO at 540 RPM), the output shaft rotates three times (at 1,620 RPM). This step-up in rotational speed is essential for centrifugal disc-type fertilizer spreaders, where the disc must rotate at high speed to broadcast granular fertilizer over a wide spread width. A higher disc speed generally produces a wider, more uniform spreading pattern. The 1:3 ratio of the L-25J is calibrated for standard 540 RPM PTO operation and is the most common ratio for light to medium centrifugal fertilizer spreader applications.

Q: How often should I change the oil in my fertilizer spreader gearbox?
A: For the L-25J, the oil change schedule is: first oil change at 50-70 operating hours (to flush break-in wear particles), then every 500-700 operating hours or at least once per year, whichever comes first. For seasonal agricultural operations, we recommend an annual oil change at the end of each spreading season, before the spreader goes into storage. This removes moisture-contaminated oil and prevents internal corrosion during the off-season. Checking the fertilizer spreader gearbox oil level before each spreading season and periodically during intensive use takes only a few minutes and is essential preventive maintenance.

Q: Can the L-25J be used at 1000 RPM PTO speed?
A: The L-25J is rated for a maximum input rotation speed of 540 r/min, which corresponds to the standard 540 RPM PTO speed used on most agricultural tractors for this class of implement. Operating the gearbox at 1000 RPM PTO speed would significantly exceed the rated maximum input speed and is not recommended, as this would increase the output shaft speed to approximately 3,000 RPM - far beyond the design limits of the gearbox and the connected spreading disc. If your application requires operation at a different PTO speed or output speed, please contact CMN Transmission's technical team to discuss the appropriate gearbox model and specification for your requirements.

Q: Does the L-25J come with oil already filled?
A: No. All L-25J gearboxes are supplied without oil (dry). Before initial operation, the gearbox must be filled with the correct grade of SAE 90EP gear oil to the specified level (maximum 0.35 L). Operating the gearbox without oil will cause immediate and irreversible damage to the bevel gears and bearings within minutes of running. Always verify the oil has been correctly filled to the level plug before engaging the PTO for the first time. CMN Transmission recommends using a clean funnel and filling slowly to avoid overfilling.

Q: What spreader brands is the L-25J compatible with besides Comer?
A: The CMN L-25J is a direct replacement for the Comer L-25J gearbox, and as such it is compatible with any fertilizer spreader originally designed around the Comer L-25J specifications. A wide range of European and global spreader manufacturers have used the Comer L-25J as an original equipment gearbox in their centrifugal disc spreader models, including various Vicon, Amazone, Kuhn, Sulky, and Bogballe models that use this gearbox family. To confirm compatibility with your specific spreader model and year, check the original spreader's parts manual or gearbox identification plate for the Comer model reference. Contact our technical team if you need confirmation for your specific spreader make and model.

P: ¿Cuál es la potencia máxima que puede transmitir el L-25J?
A: El L-25J está diseñado para una potencia de entrada máxima de 5 kW (aproximadamente 7 HP) a la velocidad de entrada de la toma de fuerza estándar de 540 RPM, con un par de salida máximo de 30 N·m. Estas especificaciones se aplican en condiciones de funcionamiento continuo y estable, con el nivel de aceite especificado y el lubricante SAE 90EP correcto. Superar estas potencias provocará un desgaste acelerado de los engranajes y cojinetes, posibles fallos en los retenes de aceite debido a las altas temperaturas de funcionamiento y, en casos extremos, fallos en los dientes o el eje del engranaje. Si su aplicación requiere una transmisión de potencia superior a estas especificaciones, póngase en contacto con CMN Transmission para obtener información sobre otros modelos de reductores de nuestra gama que admiten mayores potencias de entrada.

P: ¿Cómo puedo saber si necesito reemplazar la caja de engranajes de mi esparcidora de fertilizante?
A: Los signos comunes de que la caja de engranajes de una esparcidora de fertilizantes necesita reemplazo o mantenimiento incluyen: ruidos inusuales de rechinido, clic o zumbido durante el funcionamiento; vibración excesiva transmitida a través del bastidor de la esparcidora; fugas de aceite de los sellos del eje o las juntas de la carcasa; velocidad de rotación del disco reducida o inconsistente durante el funcionamiento; juego o holgura significativa en el eje de entrada o salida; o que el disco se detenga repentinamente bajo carga. Una caja de engranajes con fugas que ha funcionado con aceite insuficiente generalmente mostrará contaminación por partículas metálicas al drenar el aceite, lo que indica un desgaste interno significativo. En casos de sospecha de daño interno, reemplazar la unidad completa de la caja de engranajes es más rentable que intentar reparaciones internas individuales en una caja de engranajes agrícola de aluminio de pequeño formato de este tipo.

P: ¿Qué certificaciones de calidad posee el CMN L-25J?
A: CMN Transmission fabrica la caja de engranajes del esparcidor de fertilizantes L-25J bajo un sistema de gestión de calidad certificado según la norma ISO 9001, lo que garantiza una precisión dimensional constante, el cumplimiento de las especificaciones de los materiales y pruebas de rendimiento funcional en cada unidad de cada lote de producción. Nuestros productos también cuentan con la certificación CE, que confirma su conformidad con los requisitos de seguridad de la maquinaria europea. Estas certificaciones son esenciales para los importadores y distribuidores en Europa y otros mercados regulados que requieren documentación de conformidad del producto. Los clientes OEM y comerciales que requieran documentación de cualificación del proveedor pueden solicitar una copia de nuestro certificado ISO 9001 vigente y de la declaración de conformidad CE.

Opiniones de los clientes

Alejandro Martínez, Cultivos, Argentina
Gestionamos unas 1200 hectáreas de trigo y maíz en la región pampeana y utilizamos varias esparcidoras centrífugas para nuestro programa de fertilización. Sustituimos tres cajas de engranajes desgastadas por la CMN L-25J a mitad de temporada y, sinceramente, nos sorprendió lo sencillo que fue. Llegó a Buenos Aires en buen estado, el estriado era idéntico al de nuestros ejes de transmisión existentes y pusimos las tres en marcha en menos de una hora. Realizamos el primer cambio de aceite a las 60 horas, como se indicaba, y todo estaba limpio por dentro; no había partículas metálicas. Nos impresionó mucho la calidad de fabricación para el precio que tiene.

Travis Baker, Cultivo de cereales, Estados Unidos
"Pedí dos cajas de engranajes L-25J para nuestra esparcidora Vicon después de que las unidades originales de Comer comenzaran a tener fugas importantes en nuestra segunda temporada. Los repuestos de CMN llegaron a Texas en unos diez días, bien embalados. El patrón de pernos y el ajuste de las estrías coincidieron a la perfección; fue un reemplazo directo sin modificaciones. Las he estado usando durante una temporada completa de fertilización en nuestra operación de soja y están funcionando sin ningún problema. La carcasa de aluminio parece que resistirá bien el calor del verano de Oklahoma. Sin duda volveré a comprar a CMN."

Robert Anderson, Agricultura mixta, Canadá
"Tenía ciertas dudas al pedir una caja de cambios de Corea para nuestra esparcidora aquí en Ontario, pero el precio, comparado con la pieza original de Comer, era demasiado bueno como para ignorarlo. Hice el pedido y llegó en unos 12 días sin problemas de aduana. La instalé en nuestra esparcidora montada de 600 litros para la aplicación de urea en primavera. La relación de transmisión es la correcta, funciona silenciosamente y, tras el primer cambio de aceite a las 65 horas, no había nada preocupante en el aceite usado. Comprobé el nivel de aceite de nuevo hace unas semanas y se mantiene bien. Una buena inversión para una explotación agrícola que suele cambiar una o dos cajas de cambios al año."

Guillaume Dubois, Cooperativa Agrícola, Francia
En nombre de nuestra cooperativa en Pays de la Loire, adquirí seis reductores L-25J de CMN para las explotaciones de nuestros socios, en sustitución de los originales Comer, que ya estaban en mal estado. La comunicación previa a la venta fue rápida y profesional: confirmaron que las especificaciones coincidían con nuestros modelos de esparcidoras antes de que confirmáramos el pedido. El envío a Francia tardó unos 14 días por vía marítima y las seis unidades llegaron en perfecto estado. Tras una temporada de esparcimiento de cal, las seis unidades siguen funcionando correctamente sin fugas de aceite. El servicio posventa también ha sido fiable cuando hemos tenido dudas sobre el tipo de aceite. Lo recomiendo.

Klaus Wagner, Agricultura de secano, Alemania
"El artículo encaja a la perfección. Pedí las cajas de engranajes CMN L-25J para reemplazar nuestras antiguas unidades Comer en nuestra esparcidora centrífuga. El envío a Baviera tardó unos 16 días, lo cual es perfectamente razonable para un transporte internacional. El montaje fue sencillo, la conexión estriada encaja a la perfección y la caja de engranajes ha estado funcionando silenciosamente durante dos ciclos de fertilización. Excelente relación calidad-precio. Volveré a comprar aquí la próxima vez que haya desgaste. Gracias al servicio de atención al cliente por las rápidas respuestas a mis preguntas técnicas."

Nathan Campbell, Gestión de césped, Australia
Gestiono un servicio de mantenimiento de campos de golf y terrenos deportivos en tres ubicaciones de Victoria, y utilizamos esparcidoras montadas en nuestros tractores compactos para la fertilización del césped. La caja de cambios original de una de nuestras unidades se averió y el repuesto original de Comer nos iba a costar casi el doble de lo que pagamos por la unidad CMN. El envío a Melbourne tardó unas dos semanas y la caja de cambios era exactamente como se describía. El ajuste y el funcionamiento en nuestra esparcidora son perfectos y la velocidad del disco parece correcta. Llevamos dos meses esparciendo con regularidad sin ningún problema. Pediremos una de repuesto para tenerla a mano.

Fabio Ribeiro, Cultivo de café, Brasil
Pedimos dos reductores L-25J para nuestra finca cafetalera en el interior de Minas Gerais. El envío llegó a São Paulo en buen estado en aproximadamente 18 días. La instalación fue sencilla y se adaptó perfectamente a nuestra abonadora de 800 litros. Ya los hemos usado durante toda la temporada de fertilización del café y los reductores funcionan sin problemas. El servicio de preventa fue muy útil y respondió rápidamente a nuestras preguntas técnicas. Le quito una estrella solo por el tiempo de entrega, que podría haber sido un poco más rápido, pero el producto es excelente.

Marco Bianchi, Cultivo de hortalizas, Italia
Gestiono una gran explotación hortícola en el valle del Po y, debido a la intensidad de nuestro programa de fertilización, utilizamos varias cajas de engranajes para esparcidoras cada año. Encontré CMN mediante una búsqueda en línea y decidí probar tres unidades L-25J para compararlas con nuestros repuestos originales italianos habituales. El envío a Emilia-Romaña tardó unas dos semanas por mensajería. El ajuste de las estrías era correcto, el patrón de montaje coincidía y el nivel de ruido de funcionamiento es comparable al de las unidades originales. Tras tres meses de uso intensivo en nuestra producción de hortalizas al aire libre, las tres siguen funcionando sin fugas ni problemas. A partir de ahora, cambiaré nuestras compras habituales de repuestos a CMN.

Suresh Patel, distribuidor de repuestos agrícolas, India
Suministramos repuestos para maquinaria agrícola a explotaciones de toda la región de Madhya Pradesh y hemos estado probando las cajas de engranajes CMN como alternativa a los repuestos originales europeos, que son más caros, para nuestros clientes. Pedimos un lote de cinco unidades L-25J para su evaluación. La calidad a la llegada fue buena: piezas fundidas limpias, sin defectos superficiales y con los tapones de aceite bien ajustados. En nuestra primera prueba, instalamos dos unidades en esparcidoras de clientes y ambas han funcionado sin problemas durante varias aplicaciones de fertilizante. Su precio las convierte en una opción viable para los agricultores indios que necesitan repuestos fiables. Ahora hemos realizado un pedido adicional de mayor volumen.