Riduttore per spandiconcime L-25A con rapporto 3.3:1, ricambio per il riduttore Comer L-25A.

The L-25A Fertilizer Spreader Gearbox Ratio 3.3:1 Replacement for Comer L-25A Gearbox, also called a fertilizer distributor gearbox, is an essential component of agricultural machinery specifically designed for soil preparation, crop treatment, and fertilizer spreading. Positioned at the mechanical center of the spreader, it transmits power from the tractor's power take-off (PTO) to the spinning discs or augers that evenly distribute fertilizer across the fields. Engineered for durability and reliability, this agricultural gearbox ensures consistent power transmission to meet varying operational demands across different field conditions and fertilizer types.

Equipped with a precision series of gears and shafts, the gearbox for fertilizer spreader applications adjusts rotational speed and torque based on the spreading requirements, optimizing overall machine performance. Its compact aluminium housing keeps weight at just 4.1 kg while ensuring structural integrity under demanding agricultural conditions. Built to withstand the rigorous environments of chemical fertiliser application, this fertiliser spreader gearbox plays a crucial role in enhancing the efficiency and effectiveness of key farming tasks, including grain crop nutrition programs, pasture fertilization, and lawn or turf management. As a direct Comer L-25A replacement, installation is straightforward with matched splines and mounting dimensions, minimizing machine downtime during the growing season.

Parametri tecnici

Abbiamo completato un audit dei fornitori e una verifica aziendale da parte di terzi, con il supporto di SGS/TÜV Rheinland. Questa verifica consente agli acquirenti di esaminare l'identità aziendale, le attività operative, il profilo del fornitore e la capacità produttiva generale. Su richiesta, è possibile fornire report di ispezione specifici per il prodotto, documenti relativi ai materiali o registri di conformità.

Quantità minima d'ordine (MOQ): Impostabile in modo flessibile in base al tipo di prodotto e alla quantità dell'ordine.

Esempi: I nuovi clienti possono richiedere da 1 a 5 campioni in circostanze appropriate.

Ordini misti: È possibile combinare modelli diversi; l'importo totale dell'ordine deve raggiungere approssimativamente $1.500.

Piccoli ordini: Accettiamo ordini a partire da 1-2 pezzi, ma il prezzo unitario sarà relativamente più alto.

Tempi di consegna: 10-25 giorni lavorativi per i componenti standard; 20-45 giorni lavorativi per i componenti personalizzati; 45-120 giorni lavorativi per le apparecchiature realizzate su progetto.

Condizioni commerciali: I termini EXW, FOB, CIF e DAP sono generalmente supportati; i termini FCA, CFR, CPT, CIP e DDP possono essere negoziati specificamente.

Dimensioni del riduttore dello spandiconcime L-25A

Key Benefits of L-25A Fertilizer Spreader Gearbox 3.3:1

1. Compatibilità tra interfaccia PTO e scanalatura
The input shaft of this fertilizer spreader gearbox is precision-machined to match standard tractor PTO splines operating at 540 RPM, ensuring a secure, vibration-free connection. Correct PTO matching is critical in the field, as mismatched splines cause driveline misalignment, accelerated bearing wear, and potential shaft failure. CMN's L-25A features a 25 mm outside diameter connection on all three shafts, providing versatile coupling options for different spreader configurations and PTO driveline setups.

2. Gearbox Ratio and Output Options
The 3.3:1 fertilizer spreader gearbox ratio is carefully selected to convert 540 RPM tractor PTO input into the precise output speed needed for consistent spinner disc performance. This ratio ensures the disc rotates at the ideal RPM for uniform granule distribution across varying working widths. The gearbox supports multiple output shaft configurations, enabling compatibility with different disc mounts, agitator drives, and twin-disc spreader designs, making it a versatile core component for a wide range of machines.

3. Struttura in alluminio resistente alla corrosione
Fertilizer compounds including ammonium nitrate, urea, and potassium chloride are highly corrosive to unprotected metal components. The L-25A uses a lightweight yet robust aluminium alloy housing with specialized protective coatings, sealed precision bearings, and high-durability gaskets throughout. This corrosion-resistant construction prevents chemical ingress during extended application seasons, protecting internal gears and shafts from degradation. The aluminium housing also reduces overall machine weight, benefiting PTO load management on compact tractors.

4. Integrazione tra agitatore e unità disco
The L-25A is engineered with a multi-output shaft configuration (X, Y, Z axes with 25 mm outside diameter connections) to simultaneously drive spinning discs and agitator mechanisms where spreader designs require it. Agitators prevent material bridging in the hopper, a common problem with hygroscopic fertilizers in humid conditions, ensuring continuous, uninterrupted flow to the spreading discs. This integrated dual-drive capability reduces the need for additional gearbox stages and simplifies the spreader drivetrain overall.

5. Field Serviceability and Maintenance Access
Monitoring the fertilizer spreader gearbox oil level and performing routine maintenance is simple with the L-25A's accessible fill, drain, and level plugs. Integrated breather vents prevent pressure buildup during thermal cycling in the field, while inspection points allow quick visual checks between operations. The gearbox holds up to 0.35 litres of SAE 80W-90 gear oil, with the first oil change recommended at 50 to 70 operating hours and subsequently at 500-hour intervals or annually, minimizing servicing time and keeping downtime to a minimum.

6. Compatibilità di sostituzione con Direct Corner L-25A
Engineered as a precise OEM-equivalent replacement for the original Comer L-25A, this agricultural gearbox for fertilizer spreader applications matches all critical mounting dimensions, spline profiles, and shaft diameters of the original unit. Operators do not need to modify machine brackets, shielding, or driveshafts for installation. This direct compatibility makes it one of the most practical and cost-effective solutions among fertilizer spreader gearbox parts available from global suppliers, reducing both procurement lead times and installation labor costs significantly.

How Does the L-25A Gearbox Work

The L-25A fertilizer spreader gearbox begins its operation the moment the tractor PTO shaft engages. Tractor PTO output, standardized at 540 RPM for most compact and mid-range tractors, is delivered to the input shaft of the gearbox. Through the internal 3.3:1 bevel or angular gear reduction stage (gear arrangement 5-6), this 540 RPM input is converted into a lower output speed with proportionally increased torque, reaching up to 124 N·m at the output shaft. This speed-torque transformation is fundamental to proper spreading performance: too high an output RPM causes uneven granule throw patterns and over-spreading at field edges, while too low a speed results in poor distribution width and nutrient deficiency patches. The 3.3:1 ratio of this gearbox is specifically calibrated for single-disc and twin-disc centrifugal fertilizer spreaders, producing the optimal disc rotational speed for uniform distribution of granular fertilizers, lime, seed, and other agricultural amendments.

Unlike single-output industrial gearboxes, the L-25A is designed with three output connection points (X, Y, and Z axes), each with a 25 mm outside diameter, allowing the power flow to be directed simultaneously or selectively to different driven components within the spreader. In practical field operation, the primary output (Z-axis) typically drives the main spreading disc or discs, while the secondary output can be routed to an agitator shaft within the hopper. This multi-axis architecture is particularly valuable on larger-capacity spreaders where material flow consistency is critical for maintaining accurate application rates across entire field sections. The gearbox housing centres all these axes within a compact aluminium body weighing only 4.1 kg, simplifying installation on both trailed and mounted spreader frames.

The aluminium alloy housing provides structural rigidity while reducing overall component weight compared to cast iron alternatives. Internal gear surfaces are finish-ground to tight tolerances, ensuring smooth meshing under the full 2.2 kW (3 HP) input load and minimizing heat generation during sustained operation. Sealed bearing units at all shaft entry points prevent fertilizer dust, soil particles, and moisture from contaminating the gear oil, which is specified at SAE 80W-90 viscosity. The oil film established between gear teeth and bearing races is the primary protection against metal-to-metal wear. Without adequate lubrication, tooth pitting, spalling, and eventual gear failure occur rapidly, particularly in the corrosive chemical environment of fertilizer spreading operations.

During continuous field operation, gear meshing generates heat that raises the temperature of the 0.35-litre oil charge inside the housing. As temperature increases, pressure inside the sealed housing also rises. The integrated breather vent equalizes this internal pressure to prevent seal failure and oil leakage around shaft entry points. This seemingly small feature is critical to long-term gearbox reliability: without effective venting, oil seals are forced outward under internal pressure, eventually allowing corrosive fertilizer compounds to contaminate the oil and accelerate internal wear. The CMN L-25A's breather system is sized for the maximum thermal load expected at 540 RPM continuous operation, ensuring safe pressure equalization throughout the working day without requiring operator intervention. At the end of each season, a complete oil drain and refill with fresh SAE 80W-90 gear oil removes accumulated contaminants and acid byproducts from chemical fertilizer exposure, resetting the protection level for the following growing season.

Applicazioni del riduttore dello spandiconcime

Frutteti e vigneti

Precision fertilizer spreading in orchards and vineyards requires controlled application that targets root zones without over-applying in inter-row spaces or contaminating water features. The L-25A's stable output torque (up to 124 N·m) ensures consistent disc performance even when operating at lower than maximum input loads, as is common in narrow-row orchard spreader configurations. This precision protects delicate root systems and ensures that high-value tree and vine crops receive accurate nutrient inputs throughout the growing cycle.

L-25A Fertilizer Distributor Gearbox Components

Alloggiamento del cambio in alluminio
The housing is precision die-cast from high-strength aluminium alloy, providing a rigid, dimensionally stable enclosure for all internal components. At just 4.1 kg total weight, the housing significantly reduces machine-mounted load on spreader frames compared to cast iron alternatives. Internal surfaces are machined to exact tolerances for precise bearing seat and gear alignment. The housing also incorporates mounting flanges compatible with standard Comer L-25A mounting patterns, ensuring bolt-in replacement without frame modification.

Albero di ingresso
The input shaft is manufactured from high-tensile alloy steel with a splined profile designed to match standard tractor PTO driveshafts. It is supported by precision angular contact bearings that handle both the radial load from gear meshing and the axial load from PTO driveshaft coupling. The shaft surface is hardened for wear resistance at the spline engagement zone, ensuring long-term dimensional stability even under repeated attachment and detachment of PTO drive shafts in seasonal farm use. The 25 mm outside diameter provides robust engagement with standard agricultural PTO couplings.

Set di ingranaggi conici
The angular power transmission within the L-25A is achieved through a precision-cut bevel gear pair providing the 3.3:1 reduction ratio. Bevel gear teeth are cut to DIN accuracy standards and heat-treated for surface hardness combined with a tough core, maximizing resistance to contact fatigue and tooth breakage under shock loading. The gear mesh geometry is optimized to minimize noise and vibration during operation, which is particularly important for operators working near the spreader for extended periods during field applications.

Output Shafts (X, Y, Z)
Three output shaft positions (X, Y, and Z axis) are available with 25 mm outside diameters, providing flexible connection options for different spreader designs. Each output shaft is machined from alloy steel and supported by radial ball bearings dimensioned for the maximum 124 N·m torque output. The shaft ends feature keyway slots or spline profiles as specified for the target application, enabling secure coupling to disc hubs, agitator shafts, or other driven components without slippage under full operating load.

Sealed Precision Bearings
All shaft positions within the L-25A are supported by sealed deep groove ball bearings or angular contact bearings selected for the combined radial and axial load profiles at each location. The factory-fitted bearing seals prevent fertilizer dust and moisture from entering the bearing races while retaining the bearing's integral grease charge throughout its service life. Bearing seats in the aluminium housing are precision-bored to tight interference fits, preventing micro-movement and fretting corrosion that reduces bearing life on machines operating in high-vibration agricultural environments.

Shaft Oil Seals
Rotary shaft seals are fitted at each shaft exit point through the housing wall, providing a dynamic sealing barrier that prevents gear oil from leaking out and contaminating fertilizer material, while simultaneously blocking fertilizer dust and chemicals from entering the oil sump. The seal lip material is selected for chemical compatibility with SAE 80W-90 gear oil and resistance to the aggressive chemical compounds found in urea, ammonium nitrate, and other common fertilizer formulations, ensuring long seal life without swelling or hardening.

Sistema di lubrificazione
The L-25A uses a splash lubrication system where the rotation of the lower bevel gear churns the 0.35-litre SAE 80W-90 oil charge, flinging lubricant onto all gear surfaces and bearing races during operation. Fill, level, and drain plugs are accessible from the exterior of the housing for straightforward oil level checks and changes in the field. SAE 80W-90 gear oil provides the viscosity film needed at fertilizer spreader operating temperatures, protecting all gear and bearing surfaces from direct metal contact throughout the full service interval of up to 500 operating hours.

Breather Vent
The pressure equalization breather vent is a small but critical component in the L-25A's reliability system. During operation, gear churning and ambient temperature changes cause the air-oil mixture inside the housing to expand and contract. Without a breather, this pressure differential stresses shaft oil seals, eventually forcing them out of position and allowing leaks. The breather vent incorporates a labyrinthine filter pathway that allows air pressure equalization while preventing liquid oil splash from escaping and blocking fertilizer particles or water ingress into the housing interior.

How to Properly Maintain Your Fertilizer Spreader Gearbox

1. Initial Oil Fill Before First Use
The L-25A is supplied completely dry without oil. Before operating the gearbox for the first time, fill it with the correct quantity of SAE 80W-90 gear oil up to the level indicated by the oil level plug. Use a clean funnel to avoid introducing contamination. Fill slowly to allow trapped air to escape. Failure to add oil before first operation will result in immediate and severe gear and bearing damage within minutes of running, causing premature failure that voids any warranty coverage on the unit.

2. First Oil Change at 50 to 70 Hours
Perform the first riduttore dello spandiconcime oil level change after 50 to 70 operating hours. This critical early service interval removes metal particles generated during the initial bedding-in period when gear tooth surfaces and bearing races are polishing to their final running geometry. These fine metallic particles are abrasive and will accelerate wear if left in the oil. Drain the old oil warm after operation, flush briefly with fresh oil if the drained oil appears dark or metallic, then refill with 0.35 litres of fresh SAE 80W-90.

3. Regular Oil Changes Every 500 Hours or Annually
Following the initial change, renew the gear oil every 500 operating hours or at minimum once per year, whichever interval comes first. Agricultural gearboxes operating in fertilizer environments are subject to oil contamination from acid byproducts of fertilizer chemical reactions, absorbed moisture from humid operating conditions, and ongoing fine metallic wear particles. Regularly renewed SAE 80W-90 oil maintains full lubrication film integrity between all gear and bearing surfaces, preventing the progression of surface fatigue and extending service life well beyond average industry replacement intervals.

4. Inspect Oil Seals and Housing for Leaks
Before each operating season and periodically during intensive spreading campaigns, inspect all shaft exit points and housing joint faces for evidence of oil seepage or active oil leaks. A thin film of oil around a shaft seal indicates seal lip wear that will progress to a full leak. Replacement shaft seals are standard metric sizes and are available from CMN as fertilizer spreader gearbox parts. Addressing seal leaks promptly prevents oil starvation of internal gears and avoids environmental contamination of soil and water from mineral oil spillage during field operations.

5. Clean the Gearbox Exterior After Each Season
Fertilizer residue accumulating on the gearbox exterior is highly corrosive, particularly in humid storage conditions. After the spreading season concludes, thoroughly clean the external surfaces of the aluminium housing using water and a mild detergent, paying particular attention to crevices around shaft exits, mounting flanges, and plug recesses where fertilizer granules and dust accumulate. Allow the gearbox to dry completely before storage to prevent moisture-accelerated corrosion of the housing surface, fasteners, and exposed shaft sections. A light coat of spray oil on exposed shaft ends provides additional corrosion protection during off-season storage.

6. Check and Clean the Breather Vent
Inspect the breather vent for blockage at each pre-season service. Fertilizer dust mixed with oil mist can slowly clog the vent passage, preventing effective pressure equalization during operation. A blocked vent creates internal positive pressure that forces gear oil past shaft seals, leading to rapid oil loss and dry running damage. Remove the breather and flush it with clean solvent or compressed air to confirm free airflow before the spreading season commences. This two-minute check can prevent costly gearbox failures that would otherwise require complete unit replacement mid-season.

7. Monitor for Unusual Noise or Vibration
During operation, pay attention to any change in running noise or vibration from the gearbox area. A regular grinding noise may indicate bearing wear or contamination. A metallic knocking sound suggests gear tooth damage or a loose internal component. Increased vibration transmitted through the spreader frame can indicate shaft misalignment or bearing failure. Catching these symptoms early allows repair or replacement before catastrophic failure causes damage to the spreading discs, PTO driveshaft, or spreader frame. Contacting a CMN technical representative promptly when abnormal symptoms appear minimizes total repair costs.

Riduttore dello spandiconcime e albero di trasmissione della presa di forza

The power take-off (PTO) shaft and the fertilizer spreader gearbox form the heart of the complete fertilizer spreading driveline. The tractor PTO is a standardized rotating output shaft, typically driven from the tractor's transmission at 540 RPM (and in larger tractors at 1000 RPM for higher-power implements). This rotational energy is mechanically conveyed through a telescoping universal-jointed driveshaft, commonly called the PTO shaft or cardan shaft, from the tractor to the gearbox mounted on the spreader. Without this driveline connection, the spreader's discs or augers have no power source and cannot function.

The L-25A fertilizer spreader gearbox performs a fundamental mechanical transformation on the PTO shaft's rotational energy. At 540 RPM input, the 3.3:1 reduction gear set converts this speed to a lower output RPM, while simultaneously increasing output torque from the modest PTO input to up to 124 N·m at the output shaft. This torque amplification is essential because the spinning discs of a fertilizer spreader need relatively low rotational speed but substantial turning force to throw granular fertilizer materials across the full working width of the machine, which can range from 6 to 28 meters on modern spreaders depending on the material and vane configuration.

The PTO shaft connecting tractor to gearbox must be matched carefully to both the tractor's PTO stub and the gearbox's input shaft specifications. The L-25A accepts a standard PTO driveshaft with an appropriate female coupling for the 25 mm diameter input shaft. The driveshaft itself incorporates two universal joints at either end, allowing the tractor to articulate for steering and implement height adjustment while maintaining continuous power transmission to the spreader gearbox. The telescoping inner and outer shaft sections accommodate the varying length between the tractor PTO and the gearbox input as the tractor's three-point linkage raises and lowers, and as the tractor turns in the field.

A critical factor in long gearbox service life is the operating angle of the PTO driveshaft. Universal joints in the driveshaft generate cyclic vibration when operating at steep angles, and these vibrations are transmitted directly as impulse loads into the gearbox input shaft bearings. The L-25A's input shaft bearings are rated for normal working angles, but sustained operation at steep PTO shaft angles beyond 15 to 20 degrees will significantly shorten bearing service life. Proper selection of PTO shaft length and careful attention to tractor-to-spreader distance during hitching prevents excessive driveshaft angles and protects the gearbox from this form of accelerated wear.

Modern PTO driveshafts for fertilizer spreader applications also incorporate an overrunning clutch (freewheel) that allows the spreader's disc to continue spinning briefly after the PTO is disengaged, absorbing the rotational inertia of the spinning disc without reversing torque back through the gearbox. This feature is particularly important when headland turning: the operator disengages the PTO before turning to stop material spreading, and the freewheel clutch allows the residual disc rotation to wind down harmlessly without reverse-loading the gearbox input shaft or causing driveshaft vibration. Selecting a PTO shaft with appropriate safety guarding, correct profile (round, lemon, star, or wide-angle depending on the spreader) and overrunning clutch specification is as important as selecting the correct gearbox for fertilizer spreader applications.

Riduttore dello spandiconcime contro riduttore della trinciatrice a flagelli

Confronto affiancato

Perché scegliere i riduttori per spandiconcime di CMN Transmission?

Korea CMN Transmission Co., Ltd. was founded in 2000 and is headquartered in Sandan-o, Danwon-gu, Ansan-si, Gyeonggi-do, Korea. With over 100 dedicated factory employees and more than two decades of focused specialization, CMN Transmission has grown from a regional manufacturer into a globally recognized supplier of agricultural gearboxes, exporting to more than 60 destinations worldwide and earning a reputation for quality, consistency, and technical reliability across some of the world's most demanding agricultural markets.

CMN Transmission's product range is comprehensive, covering 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, center 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. Custom agricultural gearbox solutions covering nearly one thousand specifications are also available for OEM partners requiring specific ratios or configurations outside the standard catalog range.

With an annual production output exceeding 500,000 units, CMN Transmission consistently delivers reliable performance and long-term durability across all product categories. Quality management is underpinned by ISO 9001 certification, CE conformity marking, Environmental Management certification, and Occupational Health and Safety certification, providing global OEM customers and distributors with documented assurance of production consistency and product safety compliance in all major export markets.

CMN Transmission's products are actively exported to the United States, Canada, Mexico, Brazil, Argentina, France, Germany, Italy, Spain, the United Kingdom, Russia, China, India, Thailand, Vietnam, Turkey, Australia, New Zealand, and numerous additional markets across all inhabited continents. This global distribution network ensures that customers worldwide can access genuine CMN agricultural gearbox for fertilizer spreader applications with reliable logistics support and responsive after-sales technical service.

When you choose CMN Transmission as your fertilizer spreader gearbox supplier, you gain access to a manufacturer that has invested over 20 years in understanding the specific demands of agricultural power transmission, supported by engineering capability to provide custom solutions, and backed by a global service network. Whether you are a machine OEM requiring consistent volume supply, a regional distributor building inventory of replacement parts, or an individual farmer seeking a dependable and cost-effective replacement for worn machinery, CMN Transmission has the technical expertise and production capacity to meet your requirements with confidence.

Domande frequenti

D: Il cambio CMN L-25A è un sostituto diretto del cambio Comer L-25A?
A: Yes. The CMN L-25A Fertilizer Spreader Gearbox is engineered as a precise dimensional and functional replacement for the original Comer L-25A. Mounting bolt patterns, shaft diameters (25 mm on all three connection points), housing dimensions, and the 3.3:1 gear ratio all match the Comer OEM specifications. In the vast majority of direct replacement applications, no modification to the spreader frame, driveshaft, or disc mounting is required. Always cross-check your specific spreader's mounting dimensions against the CMN dimensional drawing before ordering if the machine has previously had non-Comer parts fitted.

D: Quale olio devo usare nel riduttore dello spandiconcime L-25A?
A: The recommended lubricant is SAE 80W-90 GL-4 or GL-5 mineral gear oil. This viscosity grade provides the correct oil film thickness at fertilizer spreader operating temperatures to protect bevel gear tooth surfaces and all bearing races. The gearbox holds a maximum of 0.35 litres. Do not substitute engine oil, hydraulic fluid, or other lubricant types, as incorrect viscosity or additive chemistry can reduce gear and bearing protection and shorten gearbox service life significantly. Always use a clean funnel and confirm the level with the oil level plug before first operation.

Q: When should I change the oil in my fertilizer spreader gearbox?
A: Perform the first oil change after 50 to 70 operating hours. This early service removes metallic particles generated during the initial running-in period when gear tooth surfaces are polishing to their final geometry. After the first change, renew the oil every 500 operating hours or at minimum once per year, whichever comes first. In fertilizer spreading applications, annual oil renewal at the end of the spreading season is strongly recommended even if 500 hours has not been reached, as acid byproducts from fertilizer chemical reactions can contaminate and degrade gear oil quality over storage periods.

Q: What does the 3.3:1 fertilizer spreader gearbox ratio mean for spreading performance?
A: The 3.3:1 ratio means that for every 3.3 revolutions of the PTO input shaft, the output shaft completes one revolution. At a standard 540 RPM PTO input, the output shaft rotates at approximately 164 RPM. This output speed is the designed operating RPM for the type of spinning disc used in the spreader this gearbox is designed to power. The correct disc RPM ensures granules are thrown at the right velocity to achieve the specified working width and distribution pattern. Using an incorrect gear ratio results in either under-throwing (poor working width) or over-throwing (uneven patterns) of fertilizer material.

Q: Can I use the L-25A gearbox at 1000 RPM PTO instead of 540 RPM?
A: No. The L-25A is rated for a maximum input speed of 540 r/min. Operating the gearbox with a 1000 RPM PTO input exceeds this rating by 85%, which will rapidly overload and destroy internal bearings and gear tooth surfaces. If your tractor only has a 1000 RPM PTO, the L-25A is not compatible. Contact CMN Transmission directly to discuss whether an alternative model rated for 1000 RPM PTO input is available for your specific spreader application. Never attempt to run the gearbox above its maximum rated input speed under any circumstances.

Q: How do I check the oil level in the fertilizer spreader gearbox?
A: Position the gearbox in its normal installed orientation on the spreader. Remove the oil level plug (typically located on the side of the housing at the correct fill level position). Oil should be level with the bottom of the level plug hole. If oil flows out when the plug is removed, the level is correct. If the hole is dry, the level is low and oil should be added via the fill plug until oil reaches the level plug hole. Always use the correct SAE 80W-90 gear oil when topping up. Replace both plugs securely after checking to prevent contamination entry or leakage during operation.

Q: Why is my fertilizer spreader gearbox leaking oil?
A: The most common causes of oil leakage from fertilizer spreader gearboxes are worn or damaged shaft oil seals, a blocked breather vent causing internal pressure buildup that forces oil past seals, loose or damaged fill or drain plugs, or housing gasket deterioration. Inspect all shaft exit points for oil weeping. Check that the breather vent is unobstructed and allows free airflow. Replacement oil seals and gaskets are available from CMN as standard fertilizer spreader gearbox parts. If the housing itself shows cracks, contact CMN for a complete replacement unit rather than attempting housing repair.

Q: What is the difference between a fertilizer spreader gearbox and a fertilizer distributor gearbox?
A: There is no functional difference. Fertilizer spreader gearbox and fertilizer distributor gearbox are different names for the same type of agricultural power transmission unit. The term spreader gearbox emphasizes the spreading function, while distributor gearbox emphasizes the distribution of material. Both terms describe a gearbox that takes PTO rotational input and drives a spinning disc, auger, or agitator mechanism to distribute granular agricultural products including fertilizers, lime, seed, and soil amendments across field or turf surfaces. The CMN L-25A is referred to by both names in different markets worldwide.

Q: How long does the CMN L-25A fertilizer spreader gearbox typically last?
A: With correct installation, proper initial oil filling, timely oil changes at the specified intervals (first at 50 to 70 hours, then every 500 hours or annually), and regular cleaning of fertilizer residue from the exterior, the CMN L-25A can provide many seasons of reliable service. The most common causes of premature gearbox failure are operating without sufficient oil, neglecting oil changes, allowing fertilizer to corrode the housing and seals, running above the maximum 540 RPM rated input speed, and operating with excessive PTO driveshaft angle. Avoiding these factors is the most effective way to maximize service life.

Q: What fertilizer spreader brands and models is the L-25A compatible with?
A: As a direct replacement for the Comer L-25A, the CMN version is compatible with all spreader models that originally used the Comer L-25A gearbox with a 3.3:1 ratio, including machines from brands such as Amazone, Kuhn, Vicon, Sulky, Bogballe, and various OEM-branded spreaders that sourced their original Comer gearbox. However, spreader model ranges are extensive and some machines may use variant configurations. Always verify the shaft diameters, mounting bolt pattern, and overall housing dimensions of your specific spreader against the CMN L-25A dimensional drawing before ordering to confirm direct compatibility.

Recensioni dei clienti

Alejandro, Coltivazione, Argentina
"Been farming wheat and corn out in the Pampas for over 20 years and I've been through a lot of gearboxes, let me tell you. We replaced three worn units mid-season with the CMN L-25A and honestly couldn't believe how smooth the install went. Arrived in Buenos Aires in great condition, the spline matched perfectly on all three machines, and we were back spreading within two hours total. Did the first oil change right at 60 hours like the instructions say, checked the oil and it was clean inside, no metal bits, no dark sludge. Very impressed with the quality for the price we paid."

Richard, Arable Farming, United Kingdom
"I run a 400-acre mixed arable operation in Kent and I've been using the CMN L-25A for two full spreading seasons now. Had it fitted on my Amazone spreader as a direct replacement for the Comer unit that gave out last March. Honestly fits like it was made for it. No modifications needed, bolted straight in. The quality of the aluminium casting looks solid, and after 180 hours I did the oil and it came out clean. No complaints whatsoever from a product quality standpoint. Delivery to the UK took about 12 days which was a bit longer than I hoped but the packaging was spot on."

Dave, distributore di ricambi, Stati Uniti
"Distribuiamo ricambi per macchine agricole in quattro stati del Midwest e abbiamo iniziato a tenere in magazzino il CMN L-25A circa otto mesi fa. I nostri agricoltori stanno sostituendo i riduttori Comer usurati e, onestamente, il tasso di compatibilità è molto alto, forse addirittura il 95% si adatta perfettamente senza problemi. Il rapporto di 3,3:1 è ideale per la maggior parte delle applicazioni monodisco utilizzate dai nostri clienti. Abbiamo avuto solo due resi in garanzia su 40 unità vendute e CMN ha gestito la procedura di sostituzione rapidamente e senza alcuna obiezione. Questo livello di assistenza post-vendita è molto importante per noi quando consigliamo un fornitore ai nostri clienti. Continueremo sicuramente ad ordinare da loro."

Klaus, Gestione dei pascoli, Germania
"Gestiamo un grande allevamento e utilizziamo spandiconcime in tutta la nostra area operativa. Abbiamo ordinato il riduttore CMN L-25A in sostituzione delle nostre vecchie unità Comer e siamo molto soddisfatti. La qualità è buona, le dimensioni sono corrette e il prezzo è significativamente inferiore a quello che pagavamo in precedenza al nostro rivenditore tedesco. La consegna in Germania ha richiesto circa 14 giorni. Ordineremo altre 5 unità durante il prossimo ciclo di manutenzione. Lo consigliamo vivamente."

Marc, coltivatore di grano, Canada
"Ho trovato CMN mentre cercavo un ricambio per il mio vecchio riduttore per spandiconcime che si era bloccato durante la concimazione del grano invernale. Non ero sicuro di ordinare dalla Corea, ma la pagina del prodotto aveva tutte le specifiche di cui avevo bisogno e le dimensioni corrispondevano esattamente a quelle del Comer. Ho effettuato l'ordine di martedì, ho ricevuto la conferma di spedizione con il codice di tracciamento giovedì e il riduttore era nelle mie mani in Ontario 9 giorni lavorativi dopo. L'imballaggio era robusto, senza danni. L'ho riempito con olio 80W-90 come specificato, l'ho montato sul mio spandiconcime Kuhn e ha funzionato alla grande. Sono davvero soddisfatto di come si è svolto l'intero processo, dal sito web alla consegna."

Roberto, Coltivatore di mais, Messico
"Lavoro come operatore di trattori e macchine agricole da molti anni nello stato di Sinaloa. Ho acquistato il CMN L-25A per sostituire il Comer che si è rotto proprio nel bel mezzo della stagione di concimazione del mais. Ne abbiamo ordinati tre e sono arrivati ​​a Culiacán ben imballati e in perfette condizioni. L'installazione è stata molto semplice perché le misure sono precise. Abbiamo già accumulato 90 ore di utilizzo senza alcun problema. Il prezzo è ragionevole e la qualità ci ha convinto. Ordinerò sicuramente di nuovo quando ne avrò bisogno."

Shane, Gestione del manto erboso, Australia
"Gestisco i programmi di nutrizione del manto erboso per tre campi da golf nel Queensland e utilizziamo spandiconcime azionati dalla presa di forza per la distribuzione del fertilizzante sui fairway. Il riduttore originale di una delle nostre macchine Vicon era ormai usurato e i prezzi di ricambio richiesti dal rivenditore locale erano esorbitanti. Un collega mi ha consigliato CMN e sono contento di aver seguito il suo consiglio. L'L-25A è arrivato ben imballato, si è montato perfettamente e il rapporto di 3,3:1 ci fornisce esattamente la velocità del disco di cui abbiamo bisogno per i nostri prodotti granulari. Dopo quattro mesi funziona senza problemi. Ordinerò sicuramente di nuovo da CMN."

Luca, Manutenzione dei vigneti, Italia
"Ho acquistato due riduttori per i nostri spandiconcime utilizzati nella produzione viticola in Toscana. I riduttori CMN L-25A sono arrivati ​​in ottime condizioni, con un imballaggio adeguato e senza danni da trasporto. Il montaggio è stato semplice perché le dimensioni corrispondono esattamente a quelle dell'originale Comer. Abbiamo già accumulato 130 ore di lavoro su entrambi, l'olio è stato cambiato agli intervalli corretti e tutto funziona perfettamente. Il personale tecnico di CMN ha risposto alle nostre domande via e-mail in modo chiaro e tempestivo. Ottimo rapporto qualità-prezzo."

Carlos, Produzione di soia, Brasile
"La nostra azienda agricola nel Mato Grosso produce soia su larga scala e la concimazione è fondamentale per la nostra redditività. Il riduttore CMN L-25A è arrivato rapidamente in Brasile, in soli 11 giorni lavorativi, e la qualità ha superato le nostre aspettative. La struttura in alluminio è molto più leggera rispetto ai componenti originali che utilizzavamo, il che ha contribuito a ridurre il peso della macchina. L'abbiamo installato senza apportare alcuna modifica al telaio dello spandiconcime. Abbiamo già 200 ore di utilizzo e funziona ancora perfettamente. Lo consiglio vivamente a chiunque necessiti di un ricambio di qualità per il proprio spandiconcime Comer."