Hộp số máy rải phân bón L-25J tỷ số truyền 1:3, thay thế cho hộp số máy rải phân bón 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.
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.

Thông số kỹ thuật
| Người mẫu | Hộp số L-25J tỷ lệ 1:3 |
| Thay thế thương hiệu | Góc |
| Chi tiết sản phẩm | -Tất cả các hộp số đều được cung cấp mà không có dầu bôi trơn. - Lần thay dầu đầu tiên sau 50-70 giờ hoạt động, sau đó là sau 500-700 giờ hoạt động, hoặc ít nhất một lần mỗi năm. -Liên hệ với chúng tôi để biết công suất ở tốc độ vòng quay khác. |
| Phạm vi ứng dụng | -Ứng dụng đa dạng (trong nông nghiệp) -Máy cắt cỏ - Máy xới quay nhiều hàng - Máy cưa vòng |
| Hệ số tỷ lệ | 1:3 |
| Công suất đầu vào tối đa | 5 kW |
| Tốc độ quay đầu vào tối đa | 540 vòng/phút |
| Công suất đầu ra tối đa | 7 HP |
| Mô-men xoắn đầu ra tối đa | 30 N·m |
| Kết nối 1 Đường kính ngoài inch và các rãnh then | 1.3/8-6 |
| Đường kính ngoài của mối nối 2 | 22 mm |
| Chứa dầu | KHÔNG |
| Dung tích dầu tối đa | 0,35 lít |
| Thay dầu tối đa khoảng thời gian | 500 giờ |
| Dầu có độ nhớt SAE | 90EP |
| Vật liệu xây nhà | Nhôm |
| Cân nặng | 4,1 kg |
Chúng tôi đã hoàn thành việc kiểm toán nhà cung cấp bên thứ ba và xác minh công ty được hỗ trợ bởi SGS / TÜV Rheinland. Việc xác minh này giúp người mua xem xét danh tính công ty, hoạt động kinh doanh, hồ sơ nhà cung cấp và năng lực sản xuất nói chung. Báo cáo kiểm tra sản phẩm cụ thể, tài liệu vật liệu hoặc hồ sơ tuân thủ có thể được cung cấp theo yêu cầu của đơn đặt hàng.
Số lượng đặt hàng tối thiểu (MOQ): Có thể điều chỉnh linh hoạt dựa trên loại sản phẩm và số lượng đơn hàng.
Mẫu: Khách hàng mới có thể yêu cầu từ 1 đến 5 mẫu thử trong những trường hợp thích hợp.
Đơn hàng hỗn hợp: Việc kết hợp các mẫu khác nhau được hỗ trợ; tổng giá trị đơn hàng phải đạt khoảng $1,500.
Đơn hàng nhỏ: Chúng tôi nhận đơn hàng từ 1-2 sản phẩm trở lên, nhưng giá đơn vị sẽ cao hơn một chút.
Thời gian giao hàng: Thời gian giao hàng: 10-25 ngày làm việc đối với các bộ phận tiêu chuẩn; 20-45 ngày làm việc đối với các linh kiện đặt làm riêng; 45-120 ngày làm việc đối với thiết bị theo dự án.
Điều khoản thương mại: Các điều khoản EXW, FOB, CIF và DAP thường được hỗ trợ; các điều khoản FCA, CFR, CPT, CIP và DDP có thể được thương lượng cụ thể.
Kích thước hộp số máy rải phân bón L-25J

Key Features of the L-25J Fertilizer Spreader Gearbox 1:3
1. Giao diện PTO & Khả năng tương thích trục răng
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. Cấu trúc nhôm chống ăn mòn
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.

Working Principle
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
Quản lý bãi cỏ và thảm cỏ
Professional turf managers at sports fields, golf courses, and municipal parks require precise, consistent fertilizer application to maintain high-quality grass surfaces. The L-25J fertilizer spreader gearbox supports this demanding application by providing the steady disc-drive performance needed for uniform granular fertilizer distribution across tightly managed turf areas. Its corrosion-resistant aluminium housing withstands the chemical environment of modern turf fertilizer and slow-release fertilizer blends, while the compact dimensions make it compatible with the smaller tractor-mounted spreader units typical of professional turf and amenity grounds maintenance operations.
Ngành trồng trọt và vườn ươm
Greenhouse and nursery operations demand accurate fertilizer application across densely planted beds of ornamental plants, potted crops, and young transplants where nutrient variability directly impacts product quality and commercial value. The L-25J's precise gear ratio and reliable power transmission enable controlled granular fertilizer spreading in these sensitive environments, whether applied to open nursery beds or glasshouse production rows using compact tractor-mounted spreaders. Its maintenance-friendly design reduces downtime during peak production periods when consistent feeding schedules are critical to crop performance.
Landscaping and Garden Applications
For commercial landscaping contractors and large-scale garden operations, the ability to distribute fertilizer, seed, and granular soil conditioners evenly across ornamental beds, flower borders, and amenity planting areas is essential for maintaining visual standards and plant health. The L-25J gearbox supports small-tractor or compact-utility-tractor mounted spreaders used in these applications, delivering controlled, even distribution across irregular planted areas. Its lightweight aluminium design keeps the overall spreader weight low, allowing operation with smaller horsepower tractors common in landscaping and estate management applications where garden aesthetics and ground preservation are priorities.
Quản lý đồng cỏ
In livestock farming and dairy operations, maintaining productive pastures through regular fertilizer application is essential for sustaining high-quality forage yield throughout the grazing season. Tractor-mounted fertilizer spreaders equipped with the L-25J gearbox deliver uniform distribution of nitrogen and compound fertilizers across pasture fields, promoting dense, nutritious grass growth that supports healthy livestock grazing and reduces the need for supplementary feed. The gearbox's reliable operation ensures that spreading capacity can be maintained efficiently across large grazing areas with minimal downtime.
Trồng trọt ngũ cốc
In large-scale grain production for crops including wheat, corn, barley, rice, and soybeans, precise and uniform fertilizer application is critical to achieving optimal nutrient uptake and maximum yields. The L-25J provides the consistent disc speed and torque needed for even broadcast spreading across wide grain fields, helping producers apply nitrogen, phosphorus, and potassium blends efficiently across every hectare. Accurate application directly reduces input costs and minimises the risk of over-application leading to nutrient runoff and environmental harm.
Trồng rau
Vegetable crops require carefully balanced nutrient programmes applied with precision to support rapid growth and consistent produce quality. The L-25J enables tractor-mounted fertilizer spreaders to deliver granular fertilizer evenly across vegetable beds and open-field rows, ensuring uniform nutrient distribution without damaging sensitive crops. Its reliable power transmission maintains consistent disc RPM even when operating at varying ground speeds, which is important for achieving the application rate accuracy demanded in commercial vegetable production for domestic and export markets.
Trồng cây ăn quả
Fruit crops including strawberries, melons, and soft fruit plantations benefit from timely and precise granular fertilizer application throughout the growing season. The L-25J hộp số máy rải phân bón drives the spreading disc with the rotational speed and torque necessary to broadcast fertilizer consistently across fruit rows, including along field margins and around planting beds. Its compact aluminium construction and low weight make it compatible with the smaller tractor implements often used in fruit farm operations where maneuverability and precision are prioritised over raw spreading capacity.
Vườn cây ăn quả và vườn nho
Tree fruit orchards and vineyards require targeted, precision fertilizer application around individual root zones without disturbing or damaging delicate surface root systems. Tractor-mounted spreaders fitted with the L-25J agricultural gearbox provide the spreading accuracy needed to apply granular nutrients to orchard rows and vine inter-rows efficiently, supporting fruit set, development, and canopy health. The gearbox's robust construction ensures consistent performance across the undulating terrain and narrow row widths typical of orchard and vineyard operations, delivering reliable power transmission throughout long seasonal spreading programmes.
Cải tạo đất và bón vôi
Beyond standard granular fertilizers, the L-25J is well-suited for distributing heavier soil amendment materials such as agricultural lime, ground limestone, dolomite, and granulated compost. These materials are denser than typical granular fertilizers and require a gearbox that can sustain consistent disc drive torque even under the higher disc loading that coarse, dense amendment materials generate. The L-25J's maximum output torque of 30 N·m and robust aluminium housing construction provide the mechanical resilience necessary for sustained lime-spreading operations across acidic arable land, pasture fields, or degraded soils requiring ph correction and structural improvement.

Các bước cài đặt
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. Tháo hộp số cũ
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
Hộp số máy rải phân bón là gì?
A fertilizer spreader 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 centrally on the spreader frame, it transmits power from the tractor's PTO to the spinning discs or augers that distribute fertilizer evenly across fields. Engineered for durability and reliability, these gearboxes are equipped with precision gear sets that convert PTO speed into the higher rotational output required for effective broadcast spreading of granular fertilizer, lime, seed, and soil amendments. Built to operate reliably across intensive seasonal spreading programmes, the fertilizer spreader gearbox plays a critical role in precision nutrient management for modern agriculture.
Thuận lợi
- Step-up ratio for disc speed: The 1:3 ratio converts standard 540 RPM PTO speed into the higher disc RPM needed for wide, uniform spreading patterns across fields.
- Corrosion-resistant construction: Aluminium housing and high-grade seals resist the aggressive chemical environment of fertilizer and lime spreading operations, extending gearbox service life.
- Low weight and compact design: The 4.1 kg aluminium housing minimises implement weight and reduces tractor hitch loading, improving field maneuverability.
- Low maintenance requirements: Simple oil-bath lubrication with 500-hour change intervals keeps servicing costs and downtime to a minimum across long spreading seasons.
Ứng dụng
- Centrifugal disc fertilizer spreaders for grain, pasture, and vegetable crops
- Lime and soil amendment spreaders for arable and pasture land
- Seed broadcasting applications for cover crops and overseeding
- Turf fertilizer spreading for sports fields, golf courses, and amenity grounds
What is a Rotary Tiller Gearbox?
A rotary tiller gearbox, also found in rotary cultivators, is a critical power transmission component in soil preparation equipment designed to transmit tractor PTO power to the rotary tiller's blade rotor. Unlike the fertilizer spreader gearbox which drives a spinning disc at elevated speed, the rotary tiller gearbox typically reduces PTO speed and significantly increases output torque to drive the heavy-duty tilling blades that break up, invert, and pulverise compacted soil. Rotary tillers are widely used to prepare seedbeds, incorporate crop residues, mix fertilizers into the soil profile, eliminate weed growth, and prepare ground surfaces for road construction and civil works. CMN Transmission offers a comprehensive range of high-quality rotary tiller gearboxes with multiple ratio configurations to suit diverse soil cultivation requirements and tractor horsepower classes.
Thuận lợi
- High torque output for soil cultivation: Step-down gear ratios multiply tractor PTO torque to the levels required to drive heavy-duty tilling blades through compacted and stony soils.
- Robust cast iron or steel housing: Heavy-duty construction withstands the high shock loads and vibration generated during intensive tilling operations in hard or stony ground.
- Wide operating depth range: Compatible with tiller designs operating at depths from shallow surface cultivation to deep incorporation tilling for seedbed preparation.
- Khả năng tương thích với bảo vệ quá tải: Many designs incorporate shear bolt or friction slip clutch protection against sudden rotor blockage from stones or embedded debris.
Ứng dụng
- Seedbed preparation for arable crops, vegetables, and orchards
- Crop residue and stubble incorporation after harvest
- Weed elimination and inter-row cultivation in established crops
- Grounds preparation for landscaping, sports field renovation, and road construction
Bảng so sánh:
| Tính năng | Hộp số máy rải phân bón | Hộp số máy xới quay |
|---|---|---|
| Chức năng chính | Drive spinning disc for material broadcast spreading | Drive blade rotor for soil cultivation and tillage |
| Loại tỷ số truyền | Step-up (speed increase, e.g. 1:3) | Step-down (torque increase) |
| Tốc độ đầu ra | Higher than PTO (1,620 RPM at 540 input) | Lower than PTO (typically 200-320 RPM) |
| Mô-men xoắn đầu ra | Moderate (30 N·m for L-25J) | High to very high (varies by model and ratio) |
| Vật liệu xây nhà | Nhôm (nhẹ, chống ăn mòn) | Gang hoặc thép hợp kim (loại chịu tải nặng) |
| Cân nặng | Light (4.1 kg for L-25J) | Heavy (typically 15-60+ kg) |
| Chemical Exposure | High (fertilizer, lime, agrochemicals) | Low (soil contact only) |
| Tải trọng xung kích | Thấp đến trung bình | High (stone strike, hard soil) |
| Ứng dụng điển hình | Fertilizer spreading, lime spreading, overseeding, turf management | Seedbed preparation, stubble incorporation, weed control, landscaping |

Hộp số máy rải phân bón và trục truyền động PTO
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.
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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.

Tại sao nên chọn hộp số máy rải phân bón của 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.

Câu hỏi thường gặp
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.
Q: What is the maximum power the L-25J can transmit?
A: The L-25J is rated for a maximum input power of 5 kW (approximately 7 HP) at the standard 540 RPM PTO input speed, with a maximum output torque of 30 N·m. These ratings apply under continuous steady-state operating conditions at the specified oil fill level and with the correct SAE 90EP lubricant. Exceeding these power ratings will cause accelerated gear and bearing wear, potential oil seal failure from elevated operating temperatures, and in extreme cases, gear tooth or shaft failure. If your application requires higher power transmission than these ratings, contact CMN Transmission for information on alternative gearbox models from our range that are rated for higher power inputs.
Q: How do I identify if my fertilizer spreader gearbox needs replacing?
A: Các dấu hiệu thường gặp cho thấy hộp số máy rải phân bón cần được thay thế hoặc bảo dưỡng bao gồm: tiếng ồn bất thường như tiếng mài, tiếng lách cách hoặc tiếng rít trong quá trình hoạt động; độ rung quá mức truyền qua khung máy rải; rò rỉ dầu từ các vòng đệm trục hoặc các khớp nối vỏ; tốc độ quay đĩa giảm hoặc không ổn định trong quá trình hoạt động; độ rơ hoặc độ lỏng đáng kể ở trục đầu vào hoặc đầu ra; hoặc đĩa dừng đột ngột khi đang chịu tải. Hộp số bị rò rỉ do hoạt động với lượng dầu không đủ thường sẽ cho thấy sự nhiễm bẩn các hạt kim loại khi xả dầu, cho thấy sự mài mòn đáng kể bên trong. Trong trường hợp nghi ngờ hư hỏng bên trong, việc thay thế toàn bộ cụm hộp số sẽ tiết kiệm chi phí hơn so với việc cố gắng sửa chữa riêng lẻ các bộ phận bên trong của hộp số nông nghiệp bằng nhôm cỡ nhỏ loại này.
Hỏi: Máy CMN L-25J có những chứng nhận chất lượng nào?
A: CMN Transmission sản xuất hộp số máy rải phân bón L-25J theo hệ thống quản lý chất lượng đạt chứng nhận ISO 9001, đảm bảo độ chính xác về kích thước, tuân thủ thông số kỹ thuật vật liệu và kiểm tra hiệu suất chức năng nhất quán trên từng sản phẩm trong mỗi lô sản xuất. Sản phẩm của chúng tôi cũng đạt chứng nhận CE, xác nhận sự phù hợp với các yêu cầu an toàn máy móc của Châu Âu. Các chứng nhận này rất cần thiết cho các nhà nhập khẩu và phân phối tại Châu Âu và các thị trường được quản lý khác yêu cầu tài liệu về sự phù hợp của sản phẩm. Bản sao chứng chỉ ISO 9001 hiện tại và tuyên bố về sự phù hợp CE của chúng tôi có sẵn theo yêu cầu cho các khách hàng OEM và thương mại cần tài liệu chứng minh năng lực nhà cung cấp.

Đánh giá của khách hàng
Alejandro Martinez, Nông nghiệp trồng trọt, Argentina
"Chúng tôi quản lý khoảng 1.200 ha lúa mì và ngô ở vùng Pampas và sử dụng một số máy rải phân bón ly tâm cho chương trình bón phân của mình. Giữa mùa vụ, chúng tôi đã thay thế ba hộp số bị mòn bằng hộp số CMN L-25J và thành thật mà nói, chúng tôi không thể tin được việc lắp đặt lại dễ dàng đến vậy. Hộp số được giao đến Buenos Aires trong tình trạng tốt, khớp nối hoàn toàn giống với trục truyền động hiện có của chúng tôi, và chúng tôi đã cho cả ba máy hoạt động trong vòng một giờ. Chúng tôi đã thay dầu lần đầu tiên ở 60 giờ theo hướng dẫn và mọi thứ bên trong đều sạch sẽ - không có mảnh kim loại nào cả. Rất ấn tượng với chất lượng chế tạo so với giá cả."
Travis Baker, Nông nghiệp trồng ngũ cốc, Hoa Kỳ
"Tôi đã đặt mua hai hộp số L-25J cho máy rải phân bón Vicon của chúng tôi sau khi các hộp số Comer nguyên bản bắt đầu bị rò rỉ nghiêm trọng vào mùa vụ thứ hai. Các hộp số thay thế của CMN đã được giao đến Texas trong khoảng mười ngày, được đóng gói cẩn thận. Kiểu bắt vít và khớp nối hoàn toàn phù hợp - đúng nghĩa là thay thế trực tiếp mà không cần sửa đổi gì. Tôi đã sử dụng chúng trong suốt một mùa vụ bón phân cho hoạt động trồng đậu nành của mình và chúng hoạt động mà không gặp bất kỳ vấn đề nào. Vỏ nhôm trông có vẻ sẽ chịu được cái nóng mùa hè ở Oklahoma. Chắc chắn tôi sẽ đặt hàng từ CMN một lần nữa."
Robert Anderson, Nông nghiệp hỗn hợp, Canada
"Tôi hơi do dự khi đặt mua hộp số từ Hàn Quốc cho máy rải phân bón của chúng tôi ở Ontario, nhưng giá so với phụ tùng chính hãng của Comer thì quá tốt để bỏ qua. Tôi đã đặt hàng và nó đến sau khoảng 12 ngày mà không gặp vấn đề gì về hải quan. Tôi đã lắp nó vào máy rải phân bón 600 lít của chúng tôi để rải urê vào mùa xuân. Tỷ số truyền chính xác, máy chạy êm ái, và sau lần thay dầu đầu tiên sau 65 giờ, dầu cũ không có gì đáng lo ngại. Tôi đã kiểm tra lại mức dầu vài tuần trước và nó vẫn ổn. Giá trị tốt cho một trang trại đang hoạt động, mỗi năm cần thay một hoặc hai hộp số."
Guillaume Dubois, Hợp tác xã nông nghiệp, Pháp
"Thay mặt hợp tác xã của chúng tôi ở vùng Pays de la Loire, tôi đã đặt mua sáu hộp số L-25J từ CMN cho các trang trại thành viên để thay thế các hộp số nguyên bản cũ của Comer. Quá trình liên lạc trước bán hàng rất nhanh chóng và chuyên nghiệp - họ đã xác nhận thông số kỹ thuật phù hợp với các mẫu máy rải của chúng tôi trước khi chúng tôi đặt hàng. Việc giao hàng đến Pháp mất khoảng 14 ngày bằng đường biển và cả sáu hộp số đều đến trong tình trạng hoàn hảo. Sau một mùa rải vôi, cả sáu hộp số vẫn hoạt động tốt mà không bị rò rỉ dầu. Việc liên lạc sau bán hàng cũng rất đáng tin cậy khi chúng tôi có thắc mắc về loại dầu. Rất đáng giới thiệu."
Klaus Wagner, Nông nghiệp trồng trọt, Đức
"Sản phẩm hoàn toàn phù hợp. Tôi đã đặt mua hộp số CMN L-25J để thay thế cho các hộp số Comer cũ trên máy rải phân ly tâm của chúng tôi. Việc giao hàng đến Bavaria mất khoảng 16 ngày, hoàn toàn ổn đối với vận chuyển quốc tế. Việc lắp ráp diễn ra suôn sẻ, khớp nối spline khớp chính xác, và hộp số đã hoạt động êm ái trong hai chu kỳ bón phân. Tỷ lệ giá cả/hiệu suất rất tốt. Tôi sẽ đặt hàng lại ở đây nếu có bất kỳ hư hỏng nào. Cảm ơn bộ phận chăm sóc khách hàng đã nhanh chóng trả lời các câu hỏi kỹ thuật của tôi."
Nathan Campbell, Quản lý sân cỏ, Úc
"Tôi điều hành một hoạt động bảo dưỡng sân golf và sân thể thao tại ba địa điểm ở Victoria và chúng tôi sử dụng máy rải phân bón gắn trên máy kéo nhỏ gọn để bón phân cho cỏ. Hộp số nguyên bản trên một trong những máy của chúng tôi bị hỏng một bánh răng và hộp số thay thế chính hãng của Comer có giá gần gấp đôi so với giá chúng tôi đã mua máy của CMN. Việc vận chuyển đến Melbourne mất khoảng hai tuần và hộp số hoàn toàn đúng như mô tả. Việc lắp đặt và chức năng trên máy rải phân bón của chúng tôi hoàn toàn chính xác và tốc độ đĩa nghe có vẻ đúng. Hai tháng sử dụng thường xuyên mà không gặp vấn đề gì. Tôi sẽ đặt mua thêm một cái dự phòng."
Fabio Ribeiro, Nông trại cà phê, Brazil
"Chúng tôi đã đặt mua hai hộp số L-25J cho trang trại cà phê của mình ở vùng nội địa Minas Gerais. Hàng được giao đến São Paulo trong tình trạng tốt sau khoảng 18 ngày. Việc lắp đặt rất đơn giản, nó hoàn toàn phù hợp với máy rải phân bón 800 lít của chúng tôi. Chúng tôi đã sử dụng chúng trong suốt mùa bón phân cà phê và các hộp số hoạt động mà không gặp bất kỳ vấn đề gì. Dịch vụ trước bán hàng rất hữu ích và trả lời nhanh chóng các câu hỏi kỹ thuật của chúng tôi. Chỉ trừ một sao vì thời gian giao hàng có thể nhanh hơn một chút, nhưng sản phẩm thì rất tốt."
Marco Bianchi, Trồng rau, Ý
"Tôi quản lý một trang trại trồng rau quy mô lớn ở thung lũng Po và mỗi năm chúng tôi phải thay thế vài hộp số máy rải phân bón do cường độ bón phân cao. Tôi tìm thấy CMN qua tìm kiếm trực tuyến và quyết định dùng thử ba bộ L-25J để so sánh với phụ tùng chính hãng của Ý mà chúng tôi thường dùng. Việc giao hàng đến Emilia-Romagna mất khoảng hai tuần bằng dịch vụ chuyển phát nhanh. Khớp nối trục chính xác, kiểu lắp đặt phù hợp và độ ồn khi vận hành tương đương với các bộ phận chính hãng. Sau ba tháng sử dụng liên tục trên diện tích trồng rau ngoài trời, cả ba bộ vẫn hoạt động tốt mà không bị rò rỉ hay sự cố nào. Tôi sẽ chuyển việc mua phụ tùng thay thế thường xuyên của chúng tôi sang CMN."
Suresh Patel, Nhà phân phối phụ tùng nông nghiệp, Ấn Độ
"Chúng tôi cung cấp phụ tùng máy móc nông nghiệp cho các trang trại trên khắp vùng Madhya Pradesh và đã thử nghiệm hộp số CMN như một giải pháp thay thế cho phụ tùng OEM châu Âu đắt tiền hơn dành cho khách hàng của chúng tôi. Chúng tôi đã đặt mua một lô năm hộp số L-25J để đánh giá. Chất lượng khi nhận hàng rất tốt - các chi tiết đúc sạch sẽ, không có khuyết tật bề mặt và các nút dầu được siết chặt. Chúng tôi đã lắp hai hộp số vào máy rải phân bón của khách hàng trong lần thử nghiệm đầu tiên và cả hai đều hoạt động không gặp vấn đề gì trong nhiều lần bón phân. Mức giá này khiến nó trở thành một lựa chọn khả thi cho nông dân Ấn Độ cần phụ tùng thay thế đáng tin cậy. Hiện chúng tôi đã đặt một đơn hàng lớn hơn tiếp theo."
Thông tin bổ sung
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