CMN-01-674 Fertilizer Spreader Gearbox Ratio 1.46:1 Aluminum Right Angle 23HP 540RPM PTO

Grain and Cereal Farming

In wheat, corn, barley, soybean, and rice production, precise nutrient delivery at the correct growth stage directly determines yield quality and quantity. The CMN-01-674 drives twin-disc spreaders to broadcast basal NPK fertilizers, top-dress nitrogen applications, and apply foliar supplement granules over wide working widths at tractor field speeds of 8 to 18 km/h, covering hundreds of hectares per season with consistent application accuracy.

Vegetable and Horticultural Farming

High-value vegetable crops such as potatoes, carrots, onions, cabbages, and brassicas demand precise, even fertilizer placement to prevent leaf burn and root stress. The CMN-01-674's controlled disc output speed enables fine-granule spreaders to achieve application uniformity coefficients above 85%, meeting the agronomic specifications of commercial vegetable growers and contract farming operations supplying fresh produce markets.

Fruit and Soft-Fruit Farming

Strawberry, raspberry, blueberry, and other soft-fruit systems require regular and precise potassium, phosphorous, and micronutrient applications throughout the growing season. The compact right-angle design of the CMN-01-674 suits narrower-frame inter-row spreaders used in raised-bed fruit growing systems, where clearances between plants and machinery are limited and over-application risks damaging delicate root systems or contaminating adjacent irrigation zones.

Pasture and Livestock Management

Permanent pastures for dairy, beef, and sheep operations require seasonal lime, phosphorous, and potassium inputs to maintain sward density and herbage quality. The CMN-01-674 powers centrifugal spreaders used to broadcast ground limestone at rates of 2 to 5 tonnes per hectare for soil pH correction, and to apply compound fertilizers that support ryegrass and clover recovery after grazing events, improving carrying capacity per hectare without reseeding.

Lawn, Turf, and Sports Field Management

Golf courses, cricket grounds, football pitches, racetracks, and premium residential lawns all require precise, low-rate fertilizer applications without streaking or over-application burn. The consistent disc speed delivered by the CMN-01-674 enables turf managers to achieve tight spread pattern uniformity at the slow travel speeds used on maintained turf surfaces, supporting reliable grass colour and growth rate consistency across treated areas.

Horticulture, Greenhouses, and Nurseries

Container nurseries, ornamental tree growers, and cut-flower producers utilise specialised slow-release and controlled-release fertilizer granules that require very precise placement. A spreader fitted with the CMN-01-674 and operating at reduced PTO engagement speed can achieve the low-rate, close-proximity application patterns suited to potted stock beds and polytunnel systems, where hand-spreading is slow and broadcast over-application would disrupt planting layouts.

Orchards and Vineyards

Apple, pear, cherry, grape, and olive plantings rely on localised fertilizer placement around the root drip zone rather than broadcast over the full inter-row space. Orchard spreaders fitted with the CMN-01-674 can be configured with deflector boards and targeted disc vane angles to concentrate application within a 2 to 3 metre band, minimising input wastage on non-productive soil areas and reducing nutrient leaching risk on sloped vineyard and orchard terrains.

Soil Amendments and Lime Spreading

Agricultural lime, dolomite, calcitic limestone, gypsum, and granular sulphur are essential soil amendment materials that are applied at high rates often 2 to 10 tonnes per hectare. These dense, abrasive materials impose high mechanical loads on disc spreader gearboxes. The CMN-01-674's robust 23 HP power rating, Module 5 gear tooth geometry, and sealed bearing arrangement make it well-suited for lime and amendment spreading operations that would accelerate wear in lower-rated fertilizer gearbox units.

Oil Leakage at Shaft Exits

Cause: Worn or hardened radial shaft seals, damaged seal running surface, or overfilling the oil reservoir above the correct level mark.
Solution: Drain the gearbox to the correct oil level as specified on the data plate, inspect the shaft seal running surface for groove wear, and replace the shaft seal using the correct replacement seal for the CMN-01-674. Ensure the breather vent is unblocked before refilling to prevent pressure build-up that accelerates seal failure.

Abnormal Noise or Vibration During Operation

Cause: Insufficient oil level (oil starvation causing gear and bearing noise), worn or pitted bevel gear tooth flanks, bearing inner or outer race damage, or incorrect backlash resulting from housing bore wear.
Solution: First verify oil level through the level port. Disassemble the gearbox, inspect gear tooth contact pattern and surface condition, and replace bearings or gear sets showing pitting, spalling, or unusual tooth wear patterns. Recalibrate gear mesh backlash on reassembly.

Excessive Operating Temperature

Cause: Wrong oil viscosity grade (too thick or too thin for ambient temperature), blocked breather vent preventing pressure compensation and forcing seal leakage, or operating the gearbox continuously above its rated 23 HP input power.
Solution: Drain and refill with ISO VG 220 or SAE 90 EP gear oil at the recommended quantity. Clean or replace the breather vent. Review spreading rate and ground speed to confirm the unit is not being operated above its rated power envelope.

Spline Wear or Input Shaft Play

Cause: Operating with an angular misalignment angle at the PTO universal joint exceeding 10 to 15 degrees, which generates a cyclic overload at the spline connection, or connecting the PTO shaft without lubricating the spline engagement.
Solution: Adjust hitch height to minimise PTO shaft operating angle to below 8 degrees at working position. Apply spline grease before each season and re-check engagement after the first 10 hours of operation. Replace worn spline shaft if play exceeds 0.5 mm total indicator runout.

Output Shaft Disc Drive Failure

Cause: Foreign objects (stones, wire) becoming lodged between the spinning disc and its drive connection, causing sudden shock loading that exceeds the gearbox's momentary overload capacity.
Solution: Install a torque-limiting slip clutch on the PTO driveline between the tractor and the spreader gearbox if the spreader design does not already include one. Inspect the disc drive connection key and keyway for deformation after any obstruction event, and replace deformed components before resuming operation.

Premature Bearing Failure

Cause: Fertilizer dust or moisture contamination entering through a failed shaft seal, causing abrasive wear on bearing raceways and rolling elements. Also caused by incorrect bearing pre-load applied during rebuild if bearing housings have been re-bored to oversize in an attempt to reuse worn housings.
Solution: Replace shaft seals at the first sign of leakage. After bearing replacement, use a new housing if bore wear exceeds 0.05 mm. Only use bearings from identified ISO-certified manufacturers to ensure dimensional and hardness compliance.

Corrosion of Housing External Surfaces

Cause: Failure to wash down the spreader and gearbox after each use in wet or high-concentration fertilizer conditions, allowing hygroscopic fertilizer residue to draw moisture and initiate surface corrosion, particularly at threaded plugs and seal housings.
Solution: Pressure-wash the exterior of the gearbox after each use, dry thoroughly, and apply a light film of anti-corrosion spray to external surfaces before storage. Inspect and re-apply corrosion protection to any areas showing paint or surface treatment breakdown at each pre-season service.

Fertilizer Spreader Gearbox vs. Rotary Tiller Gearbox

What Is a Fertilizer Spreader Gearbox?

A fertilizer spreader gearbox, also called a fertilizer distributor gearbox, is an essential component of agricultural machinery specifically designed for tasks such as soil preparation, crop treatment, and fertilizer spreading. Located at the centre of the machine, it transmits power from the tractor's Power Take-Off (PTO) to the spinning discs or augers that evenly distribute fertilizer across the fields. These gearboxes are engineered for durability and reliability, ensuring consistent power transmission to meet varying operational demands. Built to withstand the rigorous conditions of agricultural work, these gearboxes play a crucial role in enhancing the efficiency and effectiveness of key farming tasks.

Advantages of Fertilizer Spreader Gearboxes

• Uniform Application: Precision-controlled disc speed ensures even granule distribution across the full working width, reducing under and over-application zones that waste inputs and damage crops.
• Versatility: Compatible with fertilizers, lime, seed, and granular amendments, a single gearbox serves multiple seasonal operations.
• Low Maintenance: Splash lubrication and sealed construction minimise service intervals, reducing downtime during the critical spreading windows at planting and top-dressing.
• Corrosion Resistance: Aluminum housing and sealed bearings extend service life in the chemically aggressive fertilizer environment better than conventional cast iron units.
• Lightweight: At 7.2 kg, the CMN-01-674 imposes minimal additional mass on the spreader frame, supporting mounting on three-point linkage systems of smaller tractors.

Applications of Fertilizer Spreader Gearboxes

• Broadcast fertilizer application in cereal, oilseed, and pulse crops
• Lime and soil amendment spreading for pH correction and structure improvement
• Granular seed broadcasting for permanent pasture establishment
• Turf and sports field nutrition programmes
• Orchard and vineyard targeted fertilizer placement

What Is a Rotary Tiller Gearbox?

Rotary tillers, also called rotary cultivators, are powerful machines used in both agricultural and garden applications. They prepare the seedbed, mix fertilizers, and eliminate weeds. A rotary tiller gearbox is a critical component in soil cultivation equipment, designed to efficiently transmit power from the tractor's PTO to the rotary tiller's blades. CMN Transmission offers high-quality agricultural gearboxes for rotary tillers from our Korean manufacturing base, supplying OEMs and distributors with gearboxes in various models that can be customised to customer drawings or samples.

Advantages of Rotary Tiller Gearboxes

• High Torque Capacity: Rotary tiller gearboxes are designed to transmit very high torque to drive heavy tilling blades through dense or compacted soils, requiring robust gear tooth profiles and heavy-duty bearing arrangements.
• Impact Load Tolerance: Blade strikes on embedded stones or crop residues generate high shock loads; tiller gearboxes incorporate heavy housings and gear designs that absorb these transients without tooth fracture.
• Blade Speed Control: Multiple ratio options allow blade tip speed to be matched to soil type and tillage depth, balancing power consumption against soil particle size.
• Integral Overload Protection: Shear bolt or slip clutch systems protect the gearbox from blade jamming events that would otherwise cause catastrophic internal damage.
• Wide Model Range: Available in side-drive and centre-drive configurations to match both offset and centrally mounted tiller frames for different tractor linkage requirements.

Applications of Rotary Tiller Gearboxes

• Primary and secondary tillage for seedbed preparation in arable farming
• Vegetable garden and small-scale market garden cultivation
• Weed and residue incorporation in organic farming systems
• Orchard floor management and inter-row cultivation
• Road shoulder preparation and landscaping earthwork

Fertilizer Spreader Gearbox and Agricultural PTO Shaft

Fertilizer spreader gearboxes transfer power from the tractor's PTO to the spinner discs or agitators that distribute fertilizer, seed, or granules. The gearbox reduces or increases PTO speed as required by the specific disc design, while simultaneously changing the direction of rotation through its right-angle bevel gear set to match the vertical orientation of the disc drive shaft. The gearbox also increases torque to overcome the inertial resistance of a fully loaded disc assembly at startup, providing the smooth, progressive disc acceleration that prevents material surge and uneven spread patterns at the start of each spreading run. Its durable, corrosion-resistant design withstands the harsh fertilizer environment far longer than unprotected driveline components.

A PTO shaft, also called a Power Take-Off shaft, is a mechanical drivetrain component that transfers rotational power from a tractor or engine directly to an attached implement or piece of equipment. Rather than requiring every piece of farm machinery to carry its own engine, the PTO shaft lets a single tractor power a wide range of tools, from rotary tillers and flail mowers to wood chippers, balers, and fertilizer spreaders. The PTO shaft operates at a standard speed of 540 RPM (for utility tractors) or 1000 RPM (for high-horsepower tractors), with two or three universal joints in the shaft allowing angular variation as the implement flexes relative to the tractor on uneven ground. A safety guard tube surrounds the rotating shaft assembly to prevent operator entanglement with the spinning driveline.

The PTO shaft is the power delivery mechanism it is a coupling between the tractor's power output stub and the gearbox's input spline. The agricultural gearbox for fertilizer spreader is the power conversion mechanism it takes the PTO shaft's rotational output and transforms it in direction, speed, and torque to suit the functional requirements of the spreading discs. Without a matched PTO shaft of correct length, operating angle, and power rating, even the best gearbox will either fail early due to vibration and angular load, or perform below specification due to power losses in a misaligned or under-dimensioned driveline coupling. CMN Transmission supplies both gearboxes and compatible PTO drive shafts, allowing customers to source a validated, matched drivetrain system from a single fertilizer spreader supplier with full technical support.

Key Selection Criteria When Pairing Gearbox and PTO Shaft

• Spline Compatibility: The PTO shaft's tractor-end connection must match the tractor stub (1 3/8" Z6 is the most common), and the implement-end must match the CMN-01-674's input spline specification.
• Operating Length: PTO shaft working length must be correct at the implement's maximum hitch compression and extension positions to prevent shaft bottoming or over-extension during use.
• Power Rating: The PTO shaft's rated torque capacity must exceed the maximum torque output of the tractor at the PTO stub the CMN-01-674's 23 HP rating defines the minimum PTO shaft cross-size required for reliable long-term operation.
• Angular Capacity: Universal joints must be rated for the maximum operating angle expected on the working terrain, with a preference for constant-velocity (CV) joints on irregular terrain to eliminate cyclic vibration.
• Guard Compliance: In markets covered by CE machinery safety standards, the PTO shaft guard must meet EN ISO 4254-1 or applicable national safety regulations for operator protection.

Why Choose CMN Transmission's Fertilizer Spreader Gearboxes?

Korea CMN Transmission Co., Ltd. was established in 2000 and is located in Sandan-o, Danwon-gu, Ansan-si, Gyeonggi-do, Korea. With 100+ factory employees, CMN Transmission is dedicated to the R&D, manufacturing, sales, and service of agricultural gearboxes. Over the past two decades, CMN Transmission has grown into a reliable supplier in the global agricultural gearbox industry, exporting to 60+ destinations worldwide, including the United States, Canada, Mexico, Brazil, Argentina, France, Germany, Italy, Spain, the United Kingdom, Russia, India, Thailand, Vietnam, Turkey, Australia, and New Zealand.

CMN Transmission's product range covers 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, combine harvester gearboxes, and custom agricultural gearboxes covering nearly one thousand specifications. Our other product range includes PTO shafts, U-joints, yokes, tubes, torque limiters, covers, adapters, couplings, bearings, blades, chains, and sprockets. With an annual production quantity exceeding 500,000 units, CMN Transmission consistently delivers reliable performance and long-term durability for global OEMs and distributors.

• ISO 9001 and CE Certified
  All products are manufactured under ISO 9001:2015 quality management systems with CE certification ensuring compliance with European machinery directive requirements for global market access.
• 60+ Export Destinations
  Established export relationships across 60+ countries across six continents, with extensive experience navigating international logistics, customs documentation, and regional certification requirements for agricultural machinery components.
• Custom OEM Manufacturing
  Full custom production capability based on customer drawings and specifications, including prototype development, dimensional inspection reporting, and scalable production from small OEM batches to high-volume annual supply programmes.
• 500,000+ Units Annual Capacity
  Scale production capacity of over 500,000 agricultural gearbox units per year ensures consistent supply continuity for distributors and OEM partners with seasonal demand peaks, without lead time surprises or quality variation between batches.

Frequently Asked Questions

Q: What gear ratio does the CMN-01-674 fertilizer spreader gearbox use, and what disc RPM does it produce at 540 PTO?
A: The CMN-01-674 uses a 1.46:1 gear ratio, produced by a 19-tooth crown gear meshing with a 13-tooth bevel pinion on a Module 5 pitch. At the standard 540 RPM PTO input speed, this ratio delivers approximately 789 RPM at the output disc shaft. This output speed is within the optimal operating range for most mid-range twin-disc centrifugal spreaders used for broadcasting granular NPK fertilizers, ground limestone, and potash at typical field working widths of 12 to 24 metres.

Q: What oil should I use, and what is the correct fertilizer spreader gearbox oil level for the CMN-01-674?
A: The CMN-01-674 is designed for ISO VG 220 EP gear oil (equivalent to SAE 90 hypoid gear oil or GL-5 rated mineral gear lubricant). The correct oil level is verified through the side-mounted level plug: with the gearbox mounted in its operating position, oil should reach the level plug hole. Do not overfill excess oil pressurises the housing and forces lubricant past the shaft seals. The first oil change should be completed after the initial 50 hours of operation to flush metallic particles from the run-in period; thereafter, annual changes or every 500 operating hours are recommended, whichever occurs first.

Q: Is the CMN-01-674 compatible with 1000 RPM PTO tractors?
A: The CMN-01-674 is rated for 540 RPM PTO input operation. Operating the gearbox at 1000 RPM PTO input would produce approximately 1,460 RPM disc output speed, exceeding the design speed envelope of the internal gear and bearing components and generating excessive heat. CMN Transmission does not recommend using the CMN-01-674 at 1000 RPM PTO without first consulting the engineering team for a speed rating review. If your tractor offers both 540 and 1000 RPM PTO modes, ensure the 540 RPM mode is selected before engaging the PTO when using this gearbox.

Q: How do I check and maintain the fertilizer spreader gearbox to extend its service life?
A: Key maintenance steps for the CMN-01-674 include: (1) check and top up oil level at the start of each spreading season; (2) inspect and clean the breather vent after every 100 operating hours; (3) inspect all shaft seals for oil seepage after every season; (4) change gear oil annually or every 500 hours; (5) lubricate the PTO spline connection at the start of each season with a light lithium-based grease; (6) pressure-wash the gearbox exterior after each day's fertilizer work to prevent chemical accumulation on the housing and seals; and (7) store the spreader under cover during extended off-season periods to prevent seal drying from UV exposure.

Q: Can the CMN-01-674 gearbox be used as a direct replacement for OEM fertilizer spreader gearboxes from brands like Amazone, Vicon, or Kuhn?
A: The CMN-01-674 is designed as a universal-fit aftermarket agricultural gearbox suitable for replacing comparable gearboxes from various spreader OEMs. To confirm fitment, compare the bolt hole pattern (54 mm symmetrical), housing dimensions, output shaft connection geometry, gear ratio (1.46:1), and input spline (1 3/8" Z6) against the OEM specification of the gearbox being replaced. CMN Transmission can provide additional dimensional detail on request to facilitate fitment verification before purchase. In most cases where the original OEM unit uses a similar 1.46:1 ratio and 540 RPM input, the CMN-01-674 is a direct or near-direct replacement requiring minimal or no bracket modification.

Q: Does the CMN-01-674 fertilizer spreader gearbox come with a warranty?
A: Yes. The CMN-01-674 is covered by CMN Transmission's standard product warranty against manufacturing defects in materials and workmanship. Warranty claims require the unit to have been installed and operated in accordance with the specifications in the product datasheet, including the correct PTO speed (540 RPM), correct oil type and level, and correct PTO shaft angular alignment. Warranty does not cover damage resulting from obstruction events, incorrect oil, operation above rated power, or chemical exposure outside the defined operating environment. Contact CMN Transmission's sales or technical team for the full warranty terms applicable to your purchase quantity and region.

Q: What is the minimum order quantity for the CMN-01-674 fertilizer spreader gearbox?
A: CMN Transmission supplies the CMN-01-674 to both OEM manufacturers and aftermarket distributors. Single-unit samples can be ordered for testing and fitment verification. For regular production orders, pricing and lead time scale with order quantity. Bulk orders of 50 units or more receive preferential pricing, priority production scheduling, and dedicated export packing in wood-framed crates suitable for ocean freight container stuffing. Contact CMN Transmission's sales team directly for a formal quotation with current pricing and delivery lead times to your destination country.

Q: Are custom fertilizer spreader gearbox configurations available from CMN Transmission?
A: Yes. CMN Transmission supports custom agricultural gearbox production based on customer drawings, samples, or performance specifications. Customisation options for the fertilizer spreader gearbox range include alternative gear ratios, different housing mounting patterns, varied output shaft dimensions, alternative spline specifications, dual-output agitator drive integration, and surface treatment upgrades for extended chemical resistance. CMN's engineering team provides DFM (Design for Manufacture) review and prototype sample production before full production orders, with complete dimensional inspection reports provided with each prototype shipment.

Q: Why does my fertilizer spreader gearbox get hot during operation?
A: Moderate warmth during operation is normal. The CMN-01-674 is an oil-immersed gearbox, and equilibrium temperature at rated load is typically 40 to 60 degrees Celsius above ambient. Excessive heat (too hot to hold your hand on the housing for 5 seconds) indicates a problem. Common causes include a blocked breather vent (preventing oil mist circulation and causing pressure build-up), low oil level (reduced lubrication film thickness at gear and bearing contact zones), wrong oil viscosity grade (too thick oil in cold climates generates churning heat), or continuous operation above the 23 HP rated input. Address the root cause rather than adding extra oil, which can itself overpressurise the housing.

Customer Reviews

James O'Sullivan, Crop Farming, Ireland
"Ordered four units of the CMN-01-674 at 1.46:1 ratio for our 1,200-litre twin-disc spreaders. We've had them running for two full fertilizing seasons now spring NPK and autumn lime and not a single leak or bearing failure. The aluminum body looks brand new despite sitting outdoors all summer. Honestly better quality than some European brands we've used in the past, and the price difference was significant. Will be adding more to our fleet next year."

Mike Hartfield, Grain Farming, USA
"We run a 600-acre corn and soybean operation in Indiana. Tried the CMN-01-674 as a replacement for a failed European unit on our spreader trailer. The 1 3/8 Z6 spline dropped right onto our tractor PTO stub without any fuss, and the 1.46:1 ratio matched our original disc setup perfectly. Spread pattern was even from the first run. It's been through two planting seasons of pre-plant application without a hiccup. The tech support team responded fast when I had a question about oil capacity. Good experience all around."

Carlos Eduardo Ribeiro, Agricultural Machinery, Brazil
"As a farm machinery dealer in Minas Gerais, we stock CMN gearboxes for the Brazilian soy and sugarcane market. The CMN-01-674 sells well because the 23 HP rating handles the big 1,600-litre spreaders our clients use, and the aluminum housing handles the humid tropical climate without rusting out. We've had zero warranty returns in 14 months of sales. Shipping was well packed arrived in perfect condition. CMN's export documentation was also clean and complete, which saves us time at customs."

Dmitry Volkov, Agricultural Equipment, Russia
"Purchased 10 units for our spreader assembly line in Krasnodar. Quality is consistent batch to batch, which is what we need for production. Gear meshing is smooth, no rough running even at cold startup in winter temperatures. The dimension drawings CMN sent matched the actual parts exactly, which saved our engineering team time. We've now ordered two more batches and plan to make CMN our standard gearbox supplier for this spreader model. Delivery time was about 25 days to Russia which is acceptable."

Hans Gruber, Agricultural Contractor, Germany
"I run an agricultural contracting business in Bavaria with three tractor-trailer combinations. The CMN-01-674 gearboxes have now survived two full growing seasons in our lime spreaders, including liming at 4 tons per hectare. No wear on the seals, no noise from the gearbox housing. The aluminum housing is lighter than our old cast iron units, which helps with the three-point mounted spreaders. Service was straightforward and the gearbox ran like new after the oil change. Clear recommendation."

Ben Whitfield, Grain Farming, Australia
"We manage 3,200 hectares of wheat and canola in New South Wales and went through two cheaper gearboxes in one season before trying CMN. The CMN-01-674 has now done an entire season of dry spreading urea, MAP, potash and is still as quiet as day one. The 7.2 kg weight is a big deal on our 3-point linkage spreaders on lighter soil country where overloading the back lift is a problem. Fast response from the CMN team on a technical query about oil type too. Will keep ordering."

Thierry Moreau, Agricultural Machinery, France
"We are a distributor of agricultural equipment in southwestern France. The CMN-01-674 gearboxes are regularly ordered as replacements for the original gearboxes on our customers' fertilizer spreaders. Zero complaints since we started offering them. The manufacturing quality is consistent, and machining tolerances are respected in every batch. Export packaging is neat. Delivery times are reasonable for an Asian source, and the CMN sales department responds within 24 hours. Good partner."

Greg MacPherson, Agri Parts Distributor, Canada
"We import agricultural gearboxes for resale across western Canada. The CMN-01-674 has been one of our best movers for aftermarket fertilizer spreader service. The 23 HP, 1.46:1 spec covers a wide range of the Vicon and Amazone spreaders that dominate the Prairie market. Our customers appreciate the clean packaging and the fact that the gearbox comes pre-filled with a light transport oil and is ready to drain and refill no dried-out seals on arrival. Return rate under 1% across 200+ units sold. Happy customer here."

Ramesh Patil, Sugarcane and Wheat Farming, India
"We bought 12 CMN-01-674 gearboxes for sugarcane and wheat farming in Maharashtra. Even after three seasons of plowing and fertilizing, all units are working perfectly. The aluminum housing is durable under the impact of chemicals and the weight is also less, which reduces the load on the tractor. The CMN technical team provided very good support, timely replies were received, and the availability of spare parts was also satisfactory. We will order more in the next order."