L-25A 化肥撒布机变速箱传动比 2.78:1，可替代 Comer L-25A 变速箱

这款L-25A肥料撒布机变速箱（速比2.78:1）是Comer L-25A变速箱的替代品，也称为肥料分配器变速箱，是专为化肥撒布机和各种农业机械设计的重要动力传输部件。它位于撒布机的机械核心位置，直接从拖拉机的动力输出轴（PTO）接收高达540转/分的旋转动力，并通过精确的2.78:1减速齿轮组将其转换为合适的输出速度和扭矩，以驱动旋转盘、搅拌器或螺旋输送器，从而将颗粒状肥料、石灰、堆肥或种子均匀地撒布在农田和牧场上。这款肥料撒布机变速箱重量仅为4.1公斤，采用铝制外壳，兼具轻便性和工业级耐用性，是原装Comer L-25A变速箱的理想直接替代品。

Engineered for consistent performance under demanding field conditions, these fertilizer spreader gearboxes are designed to handle the corrosive chemical environment of fertilizer operation. Sealed bearings, precision-machined bevel gears, and a robust aluminium housing with high-durability oil seals ensure long service life even in wet, dusty, or chemically aggressive environments. With a maximum input power of 14 kW, a maximum output torque of 29 N·m, and dual 25 mm connection shafts, the gearbox integrates seamlessly into centrifugal spreaders used in crop farming, pasture management, lawn care, orchard applications, and landscaping. Maintenance is straightforward: the first oil change is required at 50 to 70 operating hours, with subsequent intervals of up to 500 hours, using SAE 80W-90 gear oil. As a leading agricultural gearbox for fertilizer spreader applications, this unit from CMN Transmission meets the daily operational demands of professional farmers, contractors, and OEM equipment builders worldwide.

技术参数

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L-25A 化肥撒布机变速箱尺寸

Key Features of the L-25A Fertilizer Spreader Gearbox 2.78:1

1.动力输出轴接口和花键兼容性
输入轴经过精密加工，与几乎所有现代拖拉机动力输出轴（PTO）在 540 转/分转速下使用的标准 1 英寸 3/8 Z6 六花键规格相匹配，确保与现有 PTO 传动系统直接、无需工具即可啮合。正确的花键几何形状至关重要：即使是微小的尺寸偏差也会导致振动、轴承过早磨损，最终导致轴损坏。L-25A 的精密切割花键轮廓保证了零间隙和从安装之日起的全扭矩传输，从而保护传动系统和撒布机构免受因轴对准不良而产生的循环应力的影响。

2. Precise Gear Ratio and Output Configuration
The 2.78:1 reduction ratio is carefully selected to translate 540 RPM tractor PTO speed into approximately 194 RPM at the output shaft, delivering the precise disc rotational speed required for optimal fertilizer throw pattern on centrifugal spreaders. Both connection diameters are standardised at 25 mm, enabling compatibility with a variety of disc mounts, single-disc configurations, and spreader agitator attachments. The fertilizer spreader gearbox ratio of 2.78:1 is engineered to produce the correct balance between spreading width and application density for granular materials including NPK fertilizers, urea, ammonium nitrate, lime, and pelleted compost.

3. 耐腐蚀铝合金结构
包括硝酸铵、尿素和氯化钾在内的化学肥料对铁金属和许多塑料具有强腐蚀性。L-25A 的压铸铝外壳可抵抗化学侵蚀，并且与同等铸铁外壳相比，重量显著减轻。内部齿轮表面经过精密表面处理，可抵御腐蚀性油污的污染，所有密封点均采用适用于肥料环境的高耐久性弹性体油封。密封的润滑脂填充轴承消除了肥料进入轴承滚道的风险，而这正是未加防护的农业齿轮箱在多尘或潮湿的施肥环境下运行的主要故障模式。

4. 搅拌器和圆盘驱动装置的集成
The dual-output shaft configuration on the L-25A with two 25 mm connection points makes it adaptable for spreader designs that require simultaneous operation of both the main spreading disc and an agitator mechanism. Agitators prevent material bridging in the hopper, which is a common operational problem with hygroscopic fertilizers such as urea and ammonium nitrate that absorb moisture and cake together in humid field conditions. By supporting both the disc drive and agitator from a single compact gearbox, the L-25A reduces mechanical complexity and eliminates the need for secondary drive chains or belt arrangements, resulting in a cleaner, lower-maintenance drivetrain layout.

5. Field Serviceability and Accessible Maintenance
日常润滑和检查的设计无需将变速箱从撒播机框架上拆卸下来即可完成。注油和放油螺塞的位置便于在典型的撒播机安装位置使用扳手进行操作，0.35 升的油量使加注操作快速便捷且干净。建议的 500 小时换油周期与大多数商业撒播作业的年度季节性计划完美契合。无需工具，只需找到壳体壁上的油位螺塞，即可目视检查肥料撒播机变速箱的油位。通气孔可防止内部压力积聚，避免润滑油泄漏到密封件之外，这一设计显著提高了变速箱在多个季节使用时的长期油封完整性。

6. Verified OEM-Quality Manufacturing Standards
每台 CMN L-25A 农用齿轮箱均在 CMN Transmission 韩国工厂按照 ISO 9001 质量管理体系生产，并带有 CE 标志，证明符合欧洲机械指令的要求。齿轮齿形、轴公差和轴承配合均严格控制在高于产品目录标准的范围内，以确保各批次产品性能的一致性和可重复性。这种严格的流程控制使 CMN 的肥料撒布机齿轮箱部件区别于那些可能外观尺寸相似，但使用劣质齿轮钢或不合格热处理工艺的通用售后市场仿制品。

工作原理

操作循环始于拖拉机后部的动力输出轴（PTO），根据欧洲和北美农业标准，其转速为 540 转/分。带有万向节的伸缩式动力输出轴将旋转能量传递至 L-25A 变速箱的输入花键。输入轴上的 1 3/8 Z6 花键与动力输出轴轭啮合，实现零齿隙，从而在接口处无打滑、无振动阻尼、无动力损失地传递全部扭矩。这种直接的机械连接确保从拖拉机上接合动力输出杆的那一刻起，100% 的可用动力输出扭矩都能传递至变速箱内部齿轮系。

Inside the aluminium housing, precision-cut bevel gears perform the core mechanical function of the gearbox: translating the 540 RPM, low-torque input from the PTO into a reduced-speed, higher-torque output. The 2.78:1 gear ratio means the output shaft turns at approximately 194 RPM for every 540 RPM at the input, while output torque increases proportionally minus frictional losses. The bevel gear arrangement redirects the rotational axis by 90 degrees, changing the power transmission direction from the longitudinal PTO axis to the transverse or vertical axis required to drive the spreader disc. This axis change is fundamental to the mechanical layout of centrifugal fertilizer spreaders, where the disc must spin in a horizontal plane while the PTO shaft is oriented longitudinally behind the tractor.

The output shaft exits the gearbox at the correct speed and torque to drive one or both spinning discs of the fertilizer spreader. Granular fertilizer falls by gravity from the hopper onto the spinning disc vanes, which impart centrifugal acceleration to each granule and project it outward in a controlled arc. The width and distribution pattern of the spread swath is determined by disc speed, vane angle, and the physical properties of the fertilizer material. At the rated 2.78:1 ratio, the L-25A delivers the disc RPM range specified by most European centrifugal spreader manufacturers for medium-spread-width granular fertilizer application, typically covering swath widths of 12 to 24 metres depending on machine setup.

变速箱内部组件浸泡在SAE 80W-90齿轮油中，该齿轮油同时润滑齿轮齿接触区、轴承和油封运行表面。选择80W-90粘度等级，是为了在最大功率运行期间齿轮齿接触压力下提供足够的油膜强度，同时在典型的田间作业温度下保持足够的流动性，以便在启动后数秒内通过飞溅润滑到达所有内部表面。铝制外壳能有效地将热量从内部组件散发出去，防止局部过热，从而避免润滑油质量下降和齿轮表面过早疲劳。适当的油位维护至关重要：如果肥料撒布机变速箱油量不足，会显著加速磨损，因此首次换油（50至70小时）是为了清除任何制造杂质，之后每隔500小时更换一次，以确保油质保持在适用范围内。

While the L-25A gearbox itself is rated to handle the continuous torque demands of normal spreading operation, the complete spreader driveline is typically protected by a slip clutch or shear bolt device located in the PTO driveshaft assembly. When the spreader disc strikes a solid obstacle or jams with caked material, these overload protection devices interrupt torque transmission before gearbox internals or the tractor PTO shaft are overloaded. The gearbox is designed to operate continuously at rated load when the overload device is correctly set, providing reliable, consistent power delivery throughout extended spreading sessions without requiring operator intervention or mid-session adjustments to maintain even application rates across the field.

肥料撒布机齿轮箱应用

L-25A Gearbox Manufacturing Process

1. Raw Material Inspection and Selection
Every production batch begins with incoming material verification. Alloy steel billets for gear and shaft production are spectrographically tested to confirm chemical composition matches the specified grade for case-hardening response. Aluminium alloy ingots for housing die casting are similarly verified for alloy grade and impurity content. Material certifications from accredited steel mills are retained and linked to production batch records, enabling full traceability of any component back to its source material lot. This first-stage quality gate prevents substandard material from entering the machining process and reaching finished products.

2. Housing Die Casting and Precision Machining
Aluminium housings are pressure die-cast in hardened steel dies to produce near-net-shape castings with consistent wall thickness, port locations, and external geometry. Following casting, each housing is transferred to CNC machining centres for the precision operations that create bearing bores, shaft passages, oil plug threads, and mounting flange surfaces. Bore diameters and positional tolerances for bearing locations are held to tighter-than-standard limits to ensure correct bevel gear mesh geometry during assembly. Surface roughness specifications on sealing surfaces prevent oil seal leakage at shaft exits. Completed castings undergo dimensional verification using coordinate measuring machines before progression to assembly.

3. Gear Cutting and Heat Treatment
Bevel gears are roughed on dedicated gear cutting machines and then finished by grinding to final tooth profile geometry. Pitch, pressure angle, lead, and tooth thickness are verified by gear measurement machines to ensure correct mesh geometry in the assembled gearbox. Following profile finishing, gears undergo case hardening heat treatment in controlled-atmosphere furnaces to develop the combination of hard, wear-resistant tooth surface and tough, impact-resistant core structure required for agricultural gearbox duty. Post-hardening, gear distortion from heat treatment is corrected by final profile grinding. Input and output shafts undergo similar turning, milling, and surface hardening operations on their spline and bearing journal surfaces before inspection.

4. Component Sub-Assembly and Bearing Installation
Gear shaft sub-assemblies are built up by pressing bearings, seals, and spacers onto machined shafts in the correct sequence before installation into the housing. Bearing press fits are dimensionally controlled to achieve the interference that prevents bearing rotation on the shaft without introducing excessive hoop stress that could fracture the bearing outer ring. Oil seals are pressed into housing bores using purpose-made tooling that applies even force across the seal body without distorting the seal lip or misaligning the seal axis. All sub-assembly operations are performed on clean, temperature-controlled benches to prevent contamination of bearing raceways and sealing surfaces before housing closure.

5. Gearbox Assembly and Gear Mesh Setting
Complete gearbox assembly is the most technically demanding production stage. Shaft and gear sub-assemblies are installed into the housing, and the bevel gear mesh is set by adjusting shim thickness at the bearing cap locations to achieve the specified tooth contact pattern and gear backlash. Contact pattern is verified using marking compound applied to the gear teeth and rotating the assembly under light load to transfer the contact footprint onto the tooth surface. Correct contact position and footprint shape are prerequisites for quiet operation and rated service life. Out-of-specification contact patterns are corrected by shim adjustment before housing cover installation. Torque plug tightening sequences are specified to prevent housing distortion and ensure consistent joint clamping across the assembly population.

6. Run-in Testing and Performance Verification
Assembled gearboxes are run on test benches under no-load and progressively loaded conditions to verify smooth rotation, correct bearing preload, absence of abnormal noise, and effective sealing at all shaft exits. Input and output shaft rotational speeds are verified against ratio specification using optical tachometers. Oil temperature rise is monitored during extended test runs to confirm that lubrication is reaching all internal surfaces without localised hot spots. Any gearbox exhibiting noise beyond the specification limit, oil seepage, or non-compliant ratio is rejected for root cause investigation and rework before re-test. Only units passing full test criteria proceed to packaging and shipment as certified fertilizer spreader gearbox parts.

7. Surface Treatment and Corrosion Protection
External exposed surfaces of shafts, plugs, and fasteners are treated with corrosion-resistant coatings appropriate to the fertilizer spreading operating environment. Aluminium housing surfaces may be anodised or painted with chemical-resistant coatings to resist the mild acid or alkali attack of fertilizer residues that accumulate on the spreader gearbox during normal operation. Internal gear and shaft surfaces receive their corrosion protection from the SAE 80W-90 oil charge, which also serves as the assembly corrosion inhibitor during the storage and transit period before first installation. Completed, sealed gearboxes are packaged with end-cap protection on all shaft stubs to prevent transit damage to precision-machined surfaces during handling and shipping.

How to Correctly Replace the L-25A Fertilizer Spreader Gearbox

1. Safety Isolation and Spreader Preparation
在开始任何变速箱更换工作之前，请先断开动力输出轴（PTO）与拖拉机的连接，将撒布器降至地面，并拉起拖拉机的驻车制动器。如果变速箱近期使用过，请使其冷却，因为铝制外壳温度可能很高，接触后会造成灼伤。彻底清空肥料料斗，并清洗撒布器以清除所有肥料残留物，从而保护操作人员以及任何工具或部件免受化学污染。拆卸前，请从多个角度拍摄现有变速箱的安装照片，以记录正确的安装方向、电缆走向以及原安装中任何需要在更换的变速箱上复制的垫片或间隔件。

2. Oil Drainage from the Old Gearbox
在现有齿轮箱下方放置合适的接油盘，并拧下放油螺塞，以便彻底排出旧润滑油。请根据当地环保法规妥善处理废旧齿轮油，因为在大多数地区，SAE 80W-90 齿轮油属于受控废物。检查排出的油液中是否有金属颗粒、水乳化或呈乳白色，这些都表明密封件失效并有水渗入，这可能意味着在本次维修中还需要检查其他部件，例如散落器轴上的轴承或密封件。清洁放油螺塞的螺纹，并在放置螺塞之前检查螺塞密封垫圈的状况。

3. Removal of the Spreader Disc and Output Connections
Before removing the gearbox from the spreader frame, disconnect the output shaft connection to the spreader disc hub. This typically involves removing a retaining bolt, nut, or snap ring at the disc hub centre, and then pulling the disc assembly free from the output shaft. Take note of any shims, spacers, or washers between the disc hub and the gearbox housing face, as these must be reinstalled in the same position on the replacement unit to maintain correct axial positioning of the disc relative to the hopper outlet. Support the disc during removal to avoid dropping it, as disc vane edges are sharp and the disc assembly is heavier than it appears.

4. Gearbox Unbolting and Removal from Frame
The gearbox mounting flange is secured to the spreader frame by four bolts through the O11 mm bolt hole pattern. Remove these four bolts and retain the original hardware for reuse with the replacement gearbox, verifying that thread condition and washer integrity are satisfactory. Lift the old gearbox clear of the frame mounting pad, taking care to catch any alignment dowels or anti-rotation pins that may be present in the mounting interface. Inspect the frame mounting surface for corrosion, warping, or cracking that could affect the seating of the replacement gearbox. Clean the mounting surface thoroughly to ensure the replacement unit sits flat without rocking, which is essential for maintaining correct output shaft alignment with the disc hub.

5. New Gearbox Installation and Torquing
将 CMN L-25A 替换变速箱放置在已清洁的安装垫上，确保输出轴方向正确，与盘式轮毂啮合，输入花键指向动力输出轴 (PTO)。首先用手指拧紧四个安装螺栓，确认变速箱平放在框架表面上，没有晃动，否则表明安装表面不平整。然后按照对角交叉方式，将四个安装螺栓拧紧至撒布机制造商规定的扭矩值，以确保安装法兰上的夹紧力均匀分布。切勿在铝制外壳法兰上使用全功率冲击扳手，因为如果扭矩施加过快且无法控制，可能会导致外壳壁上的螺纹滑丝。重新安装拆卸过程中取下的所有定位销。

6. Oil Fill, Disc Reconnection, and Pre-Start Checks
Fill the new gearbox with exactly 0.35 L of SAE 80W-90 gear oil through the fill plug, then check the oil level at the level plug to confirm correct quantity. The gearbox is supplied dry from the factory and must be filled before first operation; running even briefly without oil will cause irreversible gear and bearing damage. Reinstall the disc assembly on the output shaft with the original shims in their correct positions, and secure the disc retaining fastener to specification torque. Reconnect the PTO driveshaft and verify that all guards are correctly installed and secured. Engage the PTO at low engine speed for the first 15 minutes of initial operation, checking for abnormal noise, vibration, or oil seepage before returning to full operational workload. Log the first oil change reminder at 50 to 70 hours from first use.

如何为肥料撒布机选择合适的农业变速箱

化肥撒播机变速箱和农业动力输出轴

动力输出轴（PTO）是连接拖拉机发动机变速箱输出端和安装在拖拉机后方或牵引的任何农具的机械桥梁。在世界绝大多数农用拖拉机中，PTO短轴从变速箱壳体后部伸出，并根据拖拉机的运行速度和所选的PTO啮合模式，以540转/分或1000转/分的速度旋转。540转/分的标准转速是目前应用最广泛的轻型至中型农具，例如施肥机、割草机和耕耘机；而1000转/分则用于需要更高输入速度的大功率农具。

The PTO driveshaft assembly that connects the tractor stub shaft to the implement input gearbox consists of a telescopic central shaft that accommodates variations in the distance between tractor and implement during operation and turning, combined with universal joint assemblies at each end that transmit torque through angular misalignment between the tractor and implement when operating on uneven ground or during headland turns. These universal joints are the most maintenance-intensive components in the fertilizer spreader driveline, requiring regular greasing and periodic inspection for worn bearing cups, cracked yokes, and damaged safety guards.

肥料撒布机变速箱的动力输入完全来自动力输出轴（PTO）。动力输出轴的机具端轭与变速箱输入轴花键啮合，使两者旋转同步，确保拖拉机动力输出轴每旋转一周，变速箱输入轴也随之旋转一周。变速箱随后进行2.78:1的减速，每540转/分的输入转速即可输出194转/分的转速，同时将动力轴从纵向调整到驱动撒布盘所需的方向。这种协调的系统意味着操作员可以通过调节拖拉机发动机转速或动力输出轴啮合状态来间接控制撒布盘转速，并通过改变行驶速度和料斗出料口面积来控制施肥量。在CMN肥料撒布机变速箱产品销售和使用的所有司法管辖区，必须正确安装并固定动力输出轴防护罩，才能操作撒布机，以符合机械安全法规。

L-25A 化肥撒布机变速箱专为 1 3/8 英寸六花键 (Z6) 动力输出轴 (PTO) 连接而设计，该连接是 540 转/分拖拉机的标准配置。为 CMN L-25A 寻找替换 PTO 传动轴时，机具端轭必须与变速箱的 1 3/8 Z6 输入花键轮廓完全匹配。不匹配的花键轮廓会在啮合界面处产生微动腐蚀，产生金属颗粒，污染周围区域，最终导致花键齿在负载下磨损。如果更换变速箱的同时也更换了原传动轴，则在购买替换传动轴之前，务必测量现有机具端轭孔的轮廓。

伸缩式动力输出轴（PTO）传动轴的尺寸必须根据拖拉机与农具之间的距离进行正确选择，该距离需在最大伸展状态（拖拉机完全倒车抵住农具时）和最小压缩状态（农具在田间作业中距离拖拉机最近时）下测量。过短的传动轴可能会触底，并在负载下将变速箱向侧方推移；而过长的传动轴可能无法伸缩到足以适应拖拉机的转弯半径，并将由此产生的弯矩作为破坏性的侧向载荷传递到变速箱输入轴承上。CMN建议，同时更换变速箱和动力输出轴的客户，应由熟悉所维修拖拉机和撒播机组合的合格农机经销商测量并设置传动轴的长度。

Between the PTO driveshaft and the fertilizer spreader gearbox input, most properly configured spreader drivelines include either a slip clutch or shear bolt overload protection device. This protection device is critically important for the longevity of the L-25A gearbox: when the spreader disc is suddenly stopped by a foreign object or caked fertilizer blockage, the overload device absorbs or releases the sudden torque spike before it reaches the gearbox gear teeth. Without overload protection, a single severe jam can fracture gear teeth, destroy bearings, or crack the housing on any agricultural gearbox for fertilizer spreader applications.

为什么选择 CMN Transmission 的化肥撒布机变速箱？

Korea CMN Transmission Co., Ltd. was established in 2000 and is headquartered in Sandan-o, Danwon-gu, Ansan-si, Gyeonggi-do, Korea. Since our founding in 2000, CMN Transmission has focused exclusively on the research, development, manufacturing, and global distribution of agricultural gearboxes. This singular focus means our engineering team has accumulated over two decades of application-specific knowledge in fertilizer spreader gearbox design, materials science, and failure mode analysis that generalist transmission manufacturers simply cannot replicate. Every product improvement we implement is driven by real field data from our global customer base across 60-plus export destinations. With more than 500,000 agricultural gearbox units produced annually at our Korea manufacturing facility with over 100 factory employees, CMN Transmission has the production scale to deliver consistently high quality across large volume orders while maintaining the process discipline that smaller production volumes cannot sustain. Our production volume also drives the investment in precision CNC machining equipment, gear measurement systems, and test bench infrastructure that underpins our product quality.

除了肥料撒播机变速箱外，CMN的产品目录还涵盖旋转切割机变速箱、旋耕机变速箱、饲料搅拌机变速箱、旋转割草机变速箱、甩刀式割草机变速箱、挖坑机变速箱、圆捆机变速箱、方捆机变速箱、圆盘式割草机变速箱、中心支轴式喷灌机变速箱、液压驱动变速箱、青贮机变速箱、果园喷雾器变速箱、旋转耙变速箱、联合收割机变速箱、粮食储存机变速箱、玉米收割台变速箱、切割杆变速箱和家禽饲料机变速箱，并提供近千种规格的定制农业变速箱解决方案。如此广泛的产品线使分销商和OEM客户能够通过单一合格供应商集中采购农业变速箱。

CMN Transmission 的产品出口至美国、加拿大、墨西哥、巴西、阿根廷、法国、德国、意大利、西班牙、英国、俄罗斯、中国、印度、泰国、越南、土耳其、澳大利亚、新西兰以及全球众多其他市场。我们拥有完善的物流合作伙伴关系，确保具有竞争力的运输时间、准确的报关单据以及适合长途集装箱运输的包装，从而实现全球覆盖。凭借丰富的国际经验，我们深谙各大农业市场客户的进口要求、技术标准和商业预期。CMN Transmission 拥有 CE、ISO 9001 质量管理体系、环境管理体系以及职业健康与安全认证。这些经独立审核的认证验证了我们的生产流程、质量控制体系、环境责任实践和工作场所安全标准。对于 OEM 和分销商客户而言，CMN 的认证组合提供了必要的质量保证文件，使 CMN 成为企业采购计划中的合格供应商，并支持其产品在欧洲市场进行 CE 标志认证。

CMN的内部工程团队为OEM客户提供技术支持，包括应用选择、兼容性验证以及定制变速箱开发，助力他们打造新型撒播机或升级现有设备。我们的研发能力涵盖壳体和齿轮设计的有限元分析、非标准动力输出轴转速的齿轮比优化，以及针对特殊撒播机布局的定制轴配置开发。如果您正在寻找一家能够从规格制定到生产全程支持产品开发的肥料撒播机变速箱制造商，欢迎联系CMN，洽谈您的项目需求。

常见问题解答

Q: Is the CMN L-25A a direct replacement for the Comer L-25A gearbox?
答：是的。CMN L-25A 化肥撒布机变速箱是 Comer L-25A（Comer 代码 124.8 系列）的认证直接替代品。它与 Comer 变速箱的齿轮比 2.78:1、1 英寸 3/8 Z6 输入花键、25 毫米输出轴直径、带 O11 毫米孔距的四螺栓安装法兰以及整体外壳尺寸完全相同。对于原装配备 Comer L-25A 变速箱的撒布机，无需对机架进行任何改动或使用适配器支架，即可直接螺栓安装替换。

Q: What oil should I use in the L-25A fertilizer spreader gearbox?
A: The L-25A requires SAE 80W-90 mineral or synthetic gear oil. The housing holds 0.35 L. Fill through the fill plug on the housing top surface until oil flows from the level plug port, then reinstall both plugs. Do not use multi-grade engine oil or ATF fluid, as these do not provide the extreme pressure additive film required for bevel gear operation. The first oil change is due at 50 to 70 operating hours to remove metallic run-in particles from initial gear surface bedding. Subsequent changes at 500 hours or annually. Checking the fertilizer spreader gearbox oil level at the start of each spreading season takes less than two minutes and is the single most effective maintenance action for maximising gearbox service life.

Q: What is the correct fertilizer spreader gearbox ratio for a centrifugal disc spreader?
答：对于以 540 转/分 (RPM) 动力输出轴 (PTO) 转速运行的标准离心式撒布机，L-25A 的 2.78:1 传动比可产生约 194 转/分的输出，这在中宽幅撒布颗粒肥料的典型圆盘转速范围内。对于需要更高或更低圆盘转速的应用，有其他不同传动比的肥料撒布机变速箱可供选择。如果您要更换现有撒布机的变速箱，请确保其传动比与原变速箱相同。如果为新制造的撒布机指定变速箱，请参考圆盘和料斗制造商推荐的圆盘转速规格，并根据拖拉机的动力输出轴 (PTO) 转速反推所需的传动比。

Q: How do I check the fertilizer spreader gearbox oil level correctly?
A: Checking the fertilizer spreader gearbox oil level on the L-25A requires the spreader to be on level ground. Remove the level plug on the side of the housing. If oil flows out or is visible at the plug aperture, the level is correct. If the cavity behind the level plug is dry, the oil level is low and oil must be added through the fill plug on the housing top until oil appears at the level plug hole. Always re-install and tighten both plugs before operating the gearbox. A routine level check at the start of each spreading day during peak season takes less than one minute and ensures that oil seal leakage is detected before internal damage occurs.

Q: Can I use the L-25A gearbox with a 1000 RPM PTO tractor?
答：L-25A 变速箱的最大输入转速为 540 转/分，专为 540 转/分动力输出轴 (PTO) 的拖拉机设计。如果使用 1000 转/分的 PTO 驱动变速箱，则内部部件转速和油液搅动损失将超出设计范围，可能导致过热、密封件失效和齿轮损坏。如果您的拖拉机只有 1000 转/分的 PTO 输出，请联系 CMN Transmission 的技术团队，以确定适合您特定输入转速的变速箱型号。对于非标准转速下的动力需求，CMN 可以提供兼容的农用变速箱选项或定制配置方面的建议。

Q: What fertilizer spreader gearbox parts are commonly replaced during service?
A: The most frequently serviced fertilizer spreader gearbox parts are the oil seals on the input and output shaft exits, which should be inspected for weeping at each oil change and replaced at the first sign of seeping lubricant. Bearings are the next highest-wear items and typically last several thousand operating hours under correct lubrication conditions, but should be replaced proactively at the first sign of increased running noise or radial play at the shaft. Bevel gears themselves rarely fail in correctly lubricated gearboxes but are vulnerable to accelerated wear from low-oil operation, contaminated oil, or incorrect gear mesh from worn bearings. CMN supplies service kits containing matched oil seals and bearings for the L-25A series.

Q: Which spreader brands and models is the CMN L-25A compatible with?
答：L-25A变速箱与所有最初配备Comer L-25A变速箱的肥料撒布机兼容，包括Vicon、Amazone、Kverneland、Sulky、Bogballe、Rauch等撒布机制造商的型号，以及众多其他欧洲和北美OEM撒布机品牌，这些品牌均指定Comer L-25A作为安装或替换部件。订购前，务必根据撒布机的具体序列号和原厂零件清单进行兼容性验证，因为某些撒布机型号在不同的生产年份中可能更换了不同的变速箱。如果您能提供撒布机型号、年份以及维修文档中的原厂Comer零件编号，CMN的技术支持团队可以协助您解决兼容性问题。

Q: Is this fertiliser spreader gearbox CE certified?
答：是的。CMN Transmission 的农用变速箱产品系列已获得 CE 认证，证明其符合适用的欧洲机械指令和安全要求。对于进口到欧盟成员国或其他 CE 认可市场的客户，我们可应要求提供 CE 文件。CMN Transmission 的生产工厂也通过了 ISO 9001 质量管理体系认证、环境管理体系认证和职业健康与安全认证。这些认证通过定期第三方审核来维持，并适用于 CMN 的全系列肥料撒布机变速箱和其他农用变速箱产品。

Q: What are the correct L-25A gearbox mounting dimensions?
答：根据 Comer L-25J / L-25A 124.8 技术图纸，主要安装尺寸如下：壳体总宽度 75 毫米，壳体​​高度 113.5 毫米，XY 轴中心距 148 毫米，四个安装螺栓孔，孔径为 N.4 x O11 毫米，螺栓间距为 45 毫米 x 45 毫米，安装轴中心距壳体中心线 74 毫米 x 74 毫米，输出轴 (Z) 外径 25 毫米。输入轴为 1" 3/8 Z6 标准花键。总重量 4.1 公斤。如需 CMN L-25A 的完整认证尺寸图，请联系 CMN Transmission 的技术销售团队并提供您的应用详情。

Q: Can I order the L-25A gearbox in bulk for OEM or distributor supply?
答：是的。CMN Transmission是一家大型肥料撒播机变速箱制造商，年产量超过50万台，涵盖全系列农用变速箱产品，这使我们成为少数几家拥有真正批量生产能力，能够满足OEM和分销客户需求的供应商之一。我们为全球60多个国家的肥料撒播机供应商、设备OEM厂商和农机配件分销商供货。OEM客户可以定制标签、特定包装规格、技术文档支持以及工厂直销集装箱运输。请联系CMN国际销售团队，洽谈您特定肥料撒播机变速箱销售项目的最小起订量、价格、交货时间和定制选项。

用户评价

亚历杭德罗，阿根廷农作物种植业
“我们在潘帕斯草原种植约1200公顷的小麦和玉米，每个种植季都会使用四台离心式撒布机进行施肥。原有的两台Comer变速箱漏油，一台发出刺耳的摩擦声，所以我们在种植季中期订购了三台CMN L-25A变速箱。变速箱运抵布宜诺斯艾利斯时状态良好；三台机器的变速箱花键配合完美，我们只用了一个下午就全部更换完毕。按照说明书，我们在62小时后进行了第一次换油，放出的机油非常干净，没有金属颗粒。现在这些变速箱已经运行了280小时，仍然运转平稳。这个价位的变速箱质量真的让我非常满意。”

James, Crop Farming, United Kingdom
我在林肯郡经营着一个400英亩的耕地农场，之前用的Vicon Rotaflow撒播机，原装变速箱输出轴承坏了，需要更换。我在谷歌上搜到了CMN，就抱着试试看的心态买了L-25A。说实话，这真是个明智的选择。四天就到货了，尺寸和Comer原装的完全一样，打开包装盒一看，做工非常专业。铝制外壳明显比我见过的一些廉价仿制品要厚实。用了两个季度，一直在撒播硝酸铵和三倍过磷酸钙，没有漏水，也没有噪音。以后肯定还会再买。

克劳斯，牧场管理，德国
“我们在巴伐利亚经营着一家大型农场，使用三台离心式撒布机进行石灰和肥料施用。我们订购了 CMN L-25A 变速箱来替换原有的 Comer 设备，其卓越的品质令我们惊叹不已。从德国到慕尼黑的运输仅用了九天时间，所有部件都包装整齐，完好无损。目前，我们已安装了两台变速箱，累计运行时间超过 400 小时；它们运行安静，且完全不漏油。此外，当我们遇到关于加注润滑油的技术问题时，客户服务也迅速提供了帮助。强烈推荐！”

Craig, Sugar Cane Farming, Australia
“我在昆士兰经营一家农业承包公司，每个种植季我们都会在约6000英亩的甘蔗和高粱地里使用肥料撒布机。之前我们的一台L-25A变速箱被石头砸坏了，所以我们订购了两台。CMN的变速箱从韩国发货，12天就运到了布里斯班，完全符合我们的计​​划时间。两台变速箱都直接安装到了我们的库恩撒布机机架上，无需任何改装。其中一台已经完成了一个完整的甘蔗施肥季，在潮湿的热带环境下撒布尿素和腐植酸，运行非常稳定。油封在这种环境下完好无损，而以前那些便宜的变速箱在这种环境下早就报废了。”

Jean-Pierre, Vineyard Maintenance, France
“我们在波尔多地区管理着几处葡萄园，并使用小型撒播机为葡萄藤施肥。原装的Comer撒播机用了六个季度后开始漏油，所以我订购了两台CMN L-25A齿轮箱。制造质量很好，而且由于提供了详细的安装说明，安装也很简单。唯一的缺点是交货时间长达14天，这在春季施肥期间耽误了我们一些时间。但产品本身的质量确实令人满意。齿轮箱运行安静，撒播均匀，与原装撒播机一样。”

Nguyen Van, Rice and Vegetable, Vietnam
“我们在湄公河三角洲种植水稻和蔬菜800英亩土地，两个季度前开始使用离心式撒布机进行施肥。我们之前购买了一台二手Comer撒布机，需要更换变速箱。一位朋友向我们推荐了CMN Transmission公司。价格合理，销售团队的英语沟通也很顺畅，变速箱10天就送到了胡志明市。2.78:1的传动比正好满足我们DAP和尿素混合肥料所需的圆盘转速。我们非常满意，已经向两家邻近农场推荐了CMN，他们也需要肥料撒布机变速箱。”

Michael, Golf Course Turf Maintenance, Canada
“我负责安大略省三个高尔夫球场的草坪养护，我们使用小型拖拉机式撒布机进行季节性施肥。我们那台Vicon撒布机的原装变速箱用了八年后终于坏了，原厂配件的报价高得离谱。CMN的L-25A价格便宜得多，而且看起来做工质量也完全一样。说实话，我一开始还有点怀疑，但结果证明一切——球道上的肥料撒布均匀，变速箱运转安静，而且经过一个完整的使用季，包括冬季的沙肥混合物撒布，完全没有磨损或泄漏的迹象。运到多伦多的速度也比预期的快。”

Rajesh, Grain Farming, India
“我们位于中央邦的粮食种植合作社最近为成员农场购买了五台化肥撒布机，其中两台机器的变速箱磨损严重，需要更换。CMN团队非常专业，及时解答了我们的技术咨询，并在我们下单前确认L-25A变速箱与我们的撒布机完全匹配。五台变速箱包装完好，没有损坏，安装也非常简便。我们一直在用它们进行冬播和夏播的施肥作业，其制造质量明显优于我们之前从其他供应商那里购买的同类产品。特别是油封的质量，即使在多尘的作业环境下，也没有出现任何泄漏。”

Antonio, Crop Farming, Spain
“我们在卡斯蒂利亚-莱昂种植约3000公顷谷物，并在种植季使用多台施肥机。由于原装变速箱使用时间过长，我们需要更换两台L-25A变速箱。订购流程非常简单，销售团队也非常耐心地解答了我关于变速箱是否与我们的机器兼容的问题。货物在八个工作日内送达，包装完好。由于尺寸与原装Comer变速箱完全匹配，安装也非常快捷。两台新变速箱已经运行超过200小时，目前为止没有任何问题。产品和服务都很好。”