T-281A Gübre Serpme Makinesi Şanzıman Oranı 2.16:1, Comer T-281A Şanzımanının Yerine Geçer

The CMN Transmission T-281A Fertilizer Spreader Gearbox, ratio 2.16:1, is a direct replacement for the Comer T-281A gearbox and serves as a critical agricultural gearbox at the heart of centrifugal fertilizer spreaders. Also known as a fertilizer distributor gearbox, it converts tractor PTO rotation (540 r/min) into the precise output speed and torque required to drive spinning discs or augers that distribute fertilizers, lime, seeds, and granular amendments uniformly across the field. With a maximum output torque of 82 N·m and a rated input power of 10.3 kW (14 HP), this unit is engineered for consistent, efficient power transfer even under variable load conditions common during intensive crop production cycles.

Built around a lightweight yet rigid aluminium alloy housing and featuring three 1-3/8" Z6 spline connection points (X, Y, Z shaft positions), the T-281A fertilizer gearbox offers exceptional versatility across a broad spectrum of agricultural applications including centrifugal spreaders, multi-row rotary tillers, disc mowers, band saws, and pasture renovation equipment. As one of the leading fertilizer spreader gearbox manufacturers with over two decades of production experience, CMN Transmission engineers every unit to meet CE and ISO 9001 standards, giving operators worldwide the confidence of certified quality backed by a global service network.

Teknik Parametreler

SGS/TÜV Rheinland'ın desteğiyle üçüncü taraf tedarikçi denetimi ve şirket doğrulama sürecini tamamladık. Bu doğrulama, alıcıların şirket kimliğini, iş operasyonlarını, tedarikçi profilini ve genel üretim kapasitesini incelemelerine yardımcı olur. Sipariş gereksinimlerine göre ürüne özel denetim raporları, malzeme belgeleri veya uygunluk kayıtları sağlanabilir.

Minimum Sipariş Miktarı (MOQ): Ürün türüne ve sipariş miktarına göre esnek bir şekilde ayarlanabilir.

Örnekler: Yeni müşteriler uygun koşullar altında 1 ila 5 adet numune talep edebilirler.

Karışık Siparişler: Farklı modellerin birleştirilmesi desteklenmektedir; toplam sipariş tutarı yaklaşık 1.500 TL'ye ulaşmalıdır.

Küçük Siparişler: 1-2 adetten başlayan siparişler desteklenmektedir, ancak birim fiyatı nispeten daha yüksek olacaktır.

Kurşun zamanı: Standart parçalar için 10-25 iş günü; özel üretim parçalar için 20-45 iş günü; proje bazlı ekipmanlar için 45-120 iş günü.

Ticaret Şartları: EXW, FOB, CIF ve DAP genel olarak desteklenmektedir; FCA, CFR, CPT, CIP ve DDP şartları ise özel olarak müzakere edilebilir.

T-281A Gübre Serpme Makinesi Şanzıman Ölçüleri

Features of the T-281A Fertilizer Spreader Gearbox 2.16:1

1. Ratio Configuration & Output Options
The 2.16:1 gear ratio of this fertilizer spreader gearbox is specifically calibrated to convert 540 r/min PTO input into the optimal disc rotational speed for uniform centrifugal spreading. With gear arrangements of 25-26 / 27-28 (increasing) and 5-6 (reducing), the unit can support multiple output shaft configurations for single-disc, twin-disc, or agitator-combined spreader designs. CMN also offers adjacent ratio options from the same T-281 series to suit operators requiring different disc RPMs for specialty crops or variable-rate application programmes.

2. Korozyona Dayanıklı Yapı
Fertilizer, particularly nitrogen-based and phosphate compounds, is aggressively corrosive to unprotected metal surfaces. The T-281A agricultural gearbox addresses this with a precision die-cast aluminium alloy housing that naturally resists rust and chemical attack. Internal components are protected by high-performance 80W-90 gear oil retained by nitrile rubber lip seals on every shaft, preventing both lubricant leakage and moisture or fertilizer ingress. Protective coatings on ferrous internal parts further extend service life in environments with high humidity and chemical exposure.

3. PTO Arayüzü ve Kamalı Mil Uyumluluğu
All three shaft connections (X, Y, Z) feature the industry-standard 1-3/8" Z6 spline profile, ensuring a direct, vibration-free fit with standard tractor PTO driveshafts rated at 540 r/min. Correct spline matching is critical: mismatched connections produce harmful driveline vibration, accelerate bearing wear, and may cause shaft fatigue fractures. CMN's precision-machined splines are held to tight dimensional tolerances, guaranteeing safe and secure engagement without the need for adapter sleeves or modification.

4. Agitator & Dual Disc Drive Integration
The tri-shaft layout (X, Y, Z connection points, each rated at 1-3/8" Z6) enables the T-281A to simultaneously power both a primary spinning disc and an optional agitator shaft. In twin-disc spreader configurations, this design prevents material bridging in the hopper by continuously agitating granular fertilizer while simultaneously maintaining consistent disc speeds. This dual-drive capability reduces the need for a separate agitator motor, simplifying the overall machine design and lowering maintenance cost for the operator.

5. Sahada Servis Edilebilirlik
Designed with the working farmer in mind, the T-281A fertilizer spreader gearbox oil level can be checked and topped up quickly through clearly positioned fill and drain plugs accessible without removing the unit from the machine. The breather vent prevents pressure build-up during thermal cycling, eliminating the forced-seepage failure mode common on poorly designed gearboxes. With a simple 50-70 hour initial oil change and subsequent 500-hour intervals, routine maintenance is predictable, and fertilizer spreader gearbox parts including seals and bearings are stocked globally through the CMN distributor network.

6. Geniş Tarımsal Uygulama Yelpazesi
Beyond the primary role as a fertiliser spreader gearbox, the T-281A series is equally suited for mowers, multi-row rotary tillers, and band saw drives, making it one of the most versatile gearboxes in the CMN product catalogue. Its compact 7 kg aluminium body and standardised four-bolt mounting pattern (4x Ø11 mm, 54 mm pitch circle) allow it to be retrofitted into a wide variety of OEM and aftermarket machine frames without structural modification, reducing downtime and simplifying machine upgrades in the field.

7. Direct Comer T-281A Replacement
As an OEM-equivalent agricultural gearbox for fertilizer spreader systems, the CMN T-281A is dimensionally interchangeable with the original Comer T-281A gearbox. All critical bolt patterns, shaft diameters, spline counts, and overall envelope dimensions are matched to Comer specifications, allowing operators to swap the unit without redesigning the mounting bracket or modifying existing PTO shaft assemblies. This direct-fit design minimises machine downtime during busy spreading seasons and removes the uncertainty of sourcing expensive OEM spare parts at short notice.

How Does the T-281A Fertilizer Distributor Gearbox Work

When the tractor operator engages the PTO lever, rotational power at 540 r/min is transmitted through the PTO shaft along the driveline and enters the T-281A fertilizer spreader gearbox at the input shaft (Connection X). The 1-3/8" Z6 spline profile mates directly with the shaft coupler, creating a rigid, backlash-minimised drive connection that efficiently transfers torque without slip or vibration. Because this fertilizer gearbox is rated for a maximum input speed of 540 r/min and a maximum input power of 10.3 kW, it can safely handle the full PTO output of small to mid-range tractors throughout an entire spreading operation.

Inside the aluminium housing, the incoming high-speed, low-torque rotation from the PTO passes through a precision-cut bevel gear set. The 2.16:1 gear ratio means that for every 2.16 revolutions of the input shaft, the output shaft completes one revolution at a proportionally higher torque value. In practical terms, the maximum output torque delivered to the spreading discs or agitators is 82 N·m, which is sufficient to accelerate even dense granular fertilizer products to the disc speeds required for consistent spread patterns across widths of 8 to 24 metres, depending on spreader design and vane configuration.

The T-281A fertilizer distributor gearbox features three shaft connection points (X, Y, Z), all machined to the 1-3/8" Z6 spline standard. This tri-shaft layout allows the gearbox to simultaneously drive a primary disc (Y shaft), a secondary disc or agitator (X shaft), and a rear output (Z shaft) depending on the specific spreader design. Power division between shafts is managed by the internal gear arrangement, ensuring balanced load distribution that prevents asymmetric disc speeds, which would otherwise cause uneven spread patterns and fertilizer waste.

The gearbox runs in a sealed oil bath of SAE 80W-90 gear oil (maximum 0.5 L capacity). This viscosity grade is specifically chosen to maintain an adequate lubricant film between gear flanks and bearing races across a broad operating temperature range, from cold morning starts in temperate climates to sustained high-ambient-temperature operation in tropical agricultural zones. Heat generated by the gear mesh is absorbed by the oil, conducted through the aluminium housing walls, and dissipated into the surrounding air. The first oil change at 50-70 hours removes metal break-in particles; subsequent 500-hour intervals (or annual changes) maintain oil cleanliness and gearbox longevity.

Each rotating shaft exits the housing through a lip-type oil seal that simultaneously retains internal lubricant and excludes external contaminants including fertilizer dust, soil particles, and moisture. A breather vent maintains pressure equilibrium inside the housing as the oil heats and cools during work cycles, preventing seal distortion or forced oil expulsion. The robust sealing system is particularly important on fertilizer spreader gearboxes because ammonium nitrate and urea-based fertilizers are hygroscopic and corrosive; even trace infiltration can attack steel bearing races within a single season if seals are compromised.

The T-281A agricultural gearbox for fertilizer spreaders is bolted to the spreader frame via four M10 mounting holes arranged in a 108 mm x 108 mm square bolt pattern (4x Ø11 mm through-holes at 54 mm pitch in both axes). This four-point rigid mount effectively transfers the reaction torque from the gear set into the machine frame rather than allowing it to stress the PTO shaft or driveline components. The compact overall envelope (approximately 105 mm wide x 156 mm tall from mounting face to output shaft centre) accommodates tight installation spaces on compact and mid-size spreaders without structural modification.

Uygulama Senaryoları

T-281A Fertilizer Spreader Gearbox Parts

Şanzıman Muhafazası
The precision die-cast aluminium alloy housing forms the structural backbone of the T-281A. It provides the rigid mounting surfaces for all internal shafts and bearings, defines the gear mesh geometry critical to correct 2.16:1 ratio delivery, and acts as the primary heat exchanger dissipating thermal energy generated during gear mesh and bearing rotation. Machined mounting faces and four Ø11 mm through-bolt positions ensure repeatable, true alignment with the spreader frame across the gearbox service life.

Giriş Mili
The input shaft is manufactured from case-hardened alloy steel and ground to a 1-3/8" (approximately 35 mm) outer diameter with a 6-spline Z6 profile. It enters the housing through a radial lip seal and is supported by a deep-groove ball bearing rated for both radial and moderate axial loads. The shaft transmits full PTO torque at up to 540 r/min to the primary bevel gear without deflection, bending, or spline fretting, even after thousands of hours of operating cycles in heavy-duty spreading conditions.

Konik Dişli Takımı
The heart of the T-281A agricultural gearbox is a matched pair of spiral or straight bevel gears, precision hobbed and ground from case-hardened alloy steel. These gears convert the input shaft's axis of rotation by 90 degrees while simultaneously producing the 2.16:1 speed reduction. Gear teeth are lapped in matched pairs and marked as a set; replacing one gear without the other risks rapid wear from mismatched lead and profile errors. The gear mesh runs fully immersed in 80W-90 oil, ensuring a continuous lubricant film under all load conditions.

Output Shafts
Three output connection points, each machined to 1-3/8" Z6 spline profile, allow the gearbox to drive multiple implements simultaneously. Each shaft is independently supported by its own bearing pair and sealed by a dedicated lip seal. The shaft material, heat treatment depth, and dimensional tolerances are identical across all three positions, simplifying the inventory of spare fertilizer spreader gearbox parts and ensuring that any output shaft assembly can be replaced using the same procedure and the same CMN replacement components.

Precision Bearings
Each shaft is supported at both ends by precision-grade bearings selected for the specific loading pattern at that position. Input shaft bearings are typically deep-groove ball bearings to handle the combination of radial PTO loads and moderate axial thrust from the bevel gear mesh. Output shaft positions may use a combination of ball and angular contact or tapered roller elements to resist the higher axial loads generated as spinning discs react against the fertilizer mass. All bearings are grease-packed and oil-bath lubricated for maximum service life.

Lip Oil Seals
Radial lip seals manufactured from fluoroelastomer (FKM) or acrylonitrile butadiene rubber (NBR) are installed at each shaft exit point on the aluminium housing. These seals maintain a dynamic seal against the rotating shaft surface, retaining lubricating oil inside the gear chamber while excluding fertilizer dust, soil debris, and moisture from outside. Seal condition should be visually inspected at each oil change; evidence of oil weeping around any shaft indicates a seal nearing the end of service life and requiring replacement before it allows lubricant loss or contaminant ingress.

Yağlama Sistemi
The T-281A fertilizer spreader gearbox oil level is managed through three clearly identified ports on the housing: a fill plug at the top, a level check plug at mid-height (the oil level is correct when oil reaches the lower edge of this port), and a drain plug at the bottom for complete oil changes. A calibrated breather vent prevents vacuum or pressure build-up inside the housing as temperature fluctuates during operation, protecting seals and gaskets from pressure-induced failure without allowing unfiltered external air to enter the oil chamber.

How to Install the T-281A Gearbox on Your Fertilizer Spreader

1. Inspect and Prepare the Mounting Frame
Before fitting the T-281A gearbox, clean the spreader gearbox mounting frame thoroughly and inspect it for cracks, distortion, or rust damage. Verify that all four mounting bolt holes align with the gearbox's 4x Ø11 mm pattern on a 108 mm x 108 mm square pitch. A warped or corroded frame will induce torsional stress on the housing during operation, potentially cracking the aluminium alloy casting or distorting the internal gear mesh alignment over time.

2. Position and Align the Gearbox
Offer the T-281A up to the mounting frame and hand-tighten all four bolts before applying final torque. Check that the output shaft (Z position, pointing downward on a standard centrifugal spreader) is centred over the disc hub and that the input shaft axis is co-linear with the PTO driveshaft axis within 1 degree of angular misalignment. Use a straightedge or dial indicator across the coupling faces if precision alignment is critical, particularly on machines that run continuously at full PTO speed for extended periods.

3. Torque the Mounting Bolts to Specification
Using a calibrated torque wrench, tighten all four mounting bolts in a diagonal (cross) sequence to the torque value specified in the spreader manufacturer's manual, typically 40-55 N·m for M10 grade 8.8 bolts. Diagonal tightening ensures the housing seats evenly against the mounting face without rocking or edge loading, which could introduce stress concentrations into the aluminium housing casting near the bolt bosses. Re-check torque after the first 5 hours of operation as initial bedding-in may allow slight relaxation.

4. Connect the PTO Driveshaft
Slide the PTO driveshaft yoke over the gearbox input shaft (Connection X), ensuring the 1-3/8" Z6 splines engage fully for at least 50 mm of engagement length. Insert and secure the locking pin or snap ring on the yoke collar. Then connect the opposite end to the tractor PTO stub shaft and secure that pin as well. Check that the PTO shaft telescopes to a mid-position at work height, with at least 50 mm of overlap remaining at maximum extension and at least 25 mm of clearance from full compression at minimum height.

5. Fill with the Correct Grade of Gear Oil
The T-281A fertilizer spreader gearbox is supplied dry. Before the first start, remove the fill plug at the top of the housing and fill with SAE 80W-90 gear oil until oil reaches the lower edge of the level check port on the side of the housing. The maximum oil capacity is 0.5 L. Use only the specified viscosity grade; lighter oils reduce film thickness under load while heavier grades increase churning losses and heat at low temperatures. Replace both plugs securely and wipe away any spillage to prevent slipping hazards and to make future oil leak detection easier.

6. Attach the Spreading Discs or Output Implements
Connect the spinning disc hub(s) or implement drive couplers to the appropriate output shafts (Y and/or Z, or X depending on spreader design), ensuring spline engagement is complete and locking pins are fully seated. Confirm that all disc blades, vanes, and paddles are correctly positioned and tightened to the manufacturer's torque specification. An unbalanced disc assembly generates cyclic vibration loads that accelerate bearing wear inside the agricultural gearbox and may cause premature housing fatigue if left uncorrected.

7. Run-In Check and First Operation Inspection
Engage the tractor PTO at low idle speed (approximately half the rated 540 r/min) for 5 minutes and observe the gearbox for any unusual noise, vibration, or oil seepage around shaft seals and housing joints. Then bring PTO speed up to the full 540 r/min operating rate and run for a further 10 minutes under no-load conditions before loading the spreader hopper. Conduct the first oil change after 50-70 operating hours to remove any metallic particles generated during gear and bearing break-in, then revert to the standard 500-hour interval.

Bakım İpuçları

Gübre Serpme Makinesi Şanzımanı ve PTO Tahrik Mili

The fertilizer spreader gearbox sits between the tractor's PTO shaft and the spreader's disc or agitator mechanism, performing three simultaneous functions: changing the axis of rotation, reducing output speed from the PTO's 540 r/min to the disc's optimal operating speed, and multiplying torque from the low-torque PTO shaft output to the higher torque required to accelerate a loaded disc against the inertia of granular fertilizer material. Without the gearbox, the PTO shaft would drive the disc at full engine-related speed, producing an uncontrollably wide spread pattern and imposing excessive centrifugal loads on disc vanes and hub fasteners.

A PTO drive shaft, formerly known as a Power Take-Off shaft, is the telescoping mechanical driveshaft that transmits rotational power from a tractor's rear-mounted power take-off stub to an attached implement. Rather than requiring every piece of farm machinery to carry its own engine, the PTO shaft concept allows a single tractor to power a wide range of implements: rotary tillers, flail mowers, wood chippers, round balers, silage choppers, irrigation pumps, grain augers, and of course, fertilizer spreaders. Standard tractor PTO speed in most global markets is 540 r/min for Category I and II implements, with a 1,000 r/min standard adopted for larger, higher-power implement categories.

The physical connection between the PTO şaftı and the T-281A fertilizer gearbox is made through the 1-3/8" Z6 spline interface on the gearbox input shaft (Connection X). The PTO shaft's telescoping design accommodates the changes in distance between the tractor hitch and the implement as the machine travels over uneven ground or is raised and lowered on the three-point linkage. Universal joints at each end of the PTO shaft absorb angular misalignment between the tractor PTO stub and the gearbox input shaft, typically allowing up to 15-25 degrees of continuous operating angle without vibration or power loss.

CMN Transmission supplies a complete range of PTO shafts, universal joints (U-joints), yoke assemblies, torque limiters, and protective covers as companion products to its fertilizer spreader gearbox range. Purchasing the PTO shaft and gearbox from the same supplier ensures guaranteed dimensional and torque-rating compatibility, simplifies warranty claims, and reduces the number of suppliers a distributor or OEM needs to manage for a complete spreader drivetrain package.

When selecting a PTO shaft to pair with the T-281A agricultural gearbox for fertilizer spreaders, confirm that the shaft's rated torque capacity exceeds the gearbox's maximum input torque, that the compressed and extended lengths suit the geometry of the machine, and that the shaft incorporates a shear bolt or friction-disc torque limiter to protect both the gearbox and the tractor PTO from overload damage if the spreader discs strike a solid obstruction such as a rock or log at field speed.

CMN Transmission'ın Gübre Serpme Makinesi Şanzımanlarını Neden Tercih Etmelisiniz?

Korea CMN Transmission Co., Ltd. was established in 2000 and is headquartered in Sandan-o, Danwon-gu, Ansan-si, Gyeonggi-do, Korea. With over 100 factory employees dedicated exclusively to the research, development, manufacturing, sales, and service of agricultural gearboxes, CMN has grown over 25 years into a globally recognised supplier trusted by OEMs, distributors, and individual farmers across six continents. Our depth of engineering experience in fertilizer spreader gearboxes, PTO shaft design, and related transmission components is reflected in a product catalogue covering nearly one thousand individual specifications. Unlike generic importers or multi-category trading companies, CMN Transmission is an engineering-focused manufacturer. Every product in our range, from the compact T-281A fertilizer distributor gearbox to our heavy-duty combine harvester gearboxes, is developed and produced at our own Korean factory under a rigorous quality management system, ensuring that the component you receive performs exactly to the specification published on this page.

With an annual production quantity exceeding 500,000 units across all gearbox types, CMN Transmission has the production capacity to fulfil both small distributor orders and large OEM supply contracts without compromising on lead time or quality. Our 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, center pivot irrigation gearboxes, hydraulic drive gearboxes, silage machine gearboxes, orchard sprayer gearboxes, rotary rake gearboxes, combine harvester gearboxes, grain storage gearboxes, grain transportation gearboxes, corn header gearboxes, cutting bar gearboxes, and poultry feeding gearboxes.

In addition to gearboxes, CMN supplies PTO shafts, universal joints (U-joints), yoke assemblies, torque limiters, protective shaft covers, shaft adapters, couplings, bearings, blades, chains, and sprockets. This comprehensive product range makes CMN a single-source transmission supplier for agricultural machinery manufacturers, eliminating the complexity and cost of managing multiple specialist suppliers. All CMN Transmission products are manufactured under ISO 9001:2015 certified quality management processes and carry CE marking in compliance with the EU Machinery Directive. These are not marketing labels; they represent a structured, audited approach to incoming material inspection, in-process dimensional verification, gear contact pattern testing, heat treatment validation, and finished product functional testing before shipment.

CMN Transmission exports to the United States, Canada, Mexico, Brazil, Argentina, France, Germany, Italy, Spain, the United Kingdom, Russia, China, India, Thailand, Vietnam, Turkey, Australia, and New Zealand, with extensive experience providing technical drivetrain solutions to global agricultural machinery partners. Our global logistics network and regional distributor stock enable competitive delivery times to virtually any agricultural region worldwide. For fertilizer spreader suppliers and OEM machine builders who need a reliable, certified, competitively priced agricultural gearbox for fertilizer spreader integration, CMN Transmission offers the engineering depth, production scale, and global service infrastructure to be a long-term strategic partner. We welcome custom engineering enquiries and support production based on customer drawings and specifications for agricultural gearboxes, PTO shafts, and all related agricultural machinery transmission components.

Sıkça Sorulan Sorular

Q: Is the CMN T-281A a direct drop-in replacement for the Comer T-281A fertilizer spreader gearbox?
A: Yes. The CMN T-281A is engineered as a dimensional and functional replacement for the Comer T-281A gearbox. All critical dimensions, including the 4x Ø11 mm bolt circle on a 108 mm square pitch, the three 1-3/8" Z6 shaft splines, and the overall housing envelope match the original Comer specifications. This means operators can remove the worn Comer unit and install the CMN replacement without modifying the spreader frame, PTO shaft, or disc hub connections. We recommend verifying your specific machine's mounting drawing against our technical datasheet before ordering if you are unsure of your machine generation.

Q: What oil type should I use for the T-281A fertilizer gearbox, and what is the correct oil level?
A: Use SAE 80W-90 GL-4 or GL-5 gear oil. The maximum oil capacity is 0.5 L. The correct fertilizer spreader gearbox oil level is reached when oil is flush with the lower edge of the level check port on the side of the housing. Fill through the top fill plug until oil reaches this level. Do not overfill, as excess oil generates heat through churning and may be forced out through the shaft seals. Contact us if you need confirmation of a specific local oil brand that meets the SAE 80W-90 specification.

Q: What is the fertilizer spreader gearbox ratio of the T-281A and how does it affect spread width?
A: The T-281A has a 2.16:1 ratio, meaning the output shafts rotate once for every 2.16 input revolutions, producing approximately 250 r/min output at standard 540 r/min PTO speed. This output speed is optimised for medium-spread-width centrifugal disc spreaders. A higher disc RPM (achieved with a lower ratio such as 1.35:1) produces a wider spread pattern at the cost of reduced torque; a lower disc RPM (higher ratio such as 2.91:1) reduces spread width but increases disc torque for dense or heavy material. CMN offers the full T-281 series across ratios from 1.00:1 to 2.91:1 to match any spreading requirement.

Q: How often should I change the oil in my T-281A agricultural gearbox?
A: Perform the first oil change after 50-70 operating hours to flush out break-in metallic particles. Thereafter, change the oil every 500 hours of operation or at least once per year, whichever comes first. In high-dust conditions or when spreading corrosive materials such as ammonium sulphate, reduce the change interval to 250-300 hours. Always dispose of used gear oil responsibly through an authorised recycling facility. Use fresh SAE 80W-90 gear oil for every refill.

Q: Can the T-281A gearbox be used on spreaders that need twin-disc or agitator drive outputs?
A: Yes. The T-281A features three output shaft connection points (X, Y, Z), each machined to the 1-3/8" Z6 spline standard. This design allows simultaneous drive of a primary spreading disc (typically the Z shaft), a secondary disc or agitator (Y shaft), and an auxiliary output (X shaft) if required by the spreader design. The internal gear arrangement balances load between active outputs. Not all three shafts need to be used simultaneously; unused shaft positions simply remain capped with the factory-installed plugs and sealed against contamination.

Q: My fertilizer spreader gearbox is leaking oil around the shaft seal. What should I do?
A: A shaft seal leak is most commonly caused by: (1) a blocked breather vent creating internal pressure that forces oil past the seal lip; (2) a worn or damaged seal requiring replacement; or (3) overfilling the gearbox with oil above the correct level. First, check and clean the breather vent. If the leak continues, check the oil level and drain excess if overfilled. If the problem persists with a clean vent and correct oil level, the shaft seal requires replacement. Contact your CMN distributor for a genuine replacement seal kit matched to the T-281A shaft dimensions. Continuing to operate with a known seal leak accelerates bearing damage and risks spreading contaminated oil in the field.

Q: What is the maximum tractor PTO power the T-281A fertilizer spreader gearbox can handle?
A: The T-281A is rated for a maximum input power of 10.3 kW (approximately 14 HP) at 540 r/min. This is suitable for compact to mid-size tractors commonly paired with single-disc or light twin-disc centrifugal fertilizer spreaders. Do not use this gearbox on tractor and spreader combinations that regularly demand more than 10.3 kW at the PTO; doing so will cause accelerated gear wear, overheating, and possible housing failure. For higher-power applications, CMN offers larger-format gearboxes from the T-281 series range rated to 16.9 kW (292 N·m output torque). Contact us for the correct specification for your machine.

Q: Are fertilizer spreader gearbox parts like seals, bearings, and gear sets available separately?
A: Yes, CMN Transmission supports the T-281A with a comprehensive spare parts programme. Available fertilizer spreader gearbox parts include: shaft seal kits (all three positions), precision bearing sets, complete gear shaft assemblies, housing gaskets, breather vents, drain and fill plugs, and oil level check plug assemblies. Parts are stocked by authorised CMN distributors in over 60 countries, enabling rapid local supply for time-critical in-season repairs. Contact your local CMN distributor or us with your gearbox serial number to ensure correct part selection.

Q: Does the T-281A fertilizer gearbox meet CE and ISO 9001 standards?
A: Yes. CMN Transmission manufactures all agricultural gearboxes, including the T-281A fertilizer spreader gearbox, under an ISO 9001:2015 certified quality management system. The products carry CE marking, confirming compliance with the EU Machinery Directive. This certification is essential for OEM integrators supplying CE-marked spreading equipment to European and other markets that recognise CE as a conformity benchmark. Documentation including CE declarations and ISO certificates can be provided on request for OEM and distributor partners.

Q: Can CMN Transmission supply customised fertilizer spreader gearboxes to OEM specifications?
A: Yes. CMN Transmission supports custom agricultural gearbox production based on customer-supplied drawings, 3D models, or performance specifications. Custom capabilities include: modified housing configurations for non-standard mounting geometries; non-standard shaft diameters, spline counts, or keyway profiles; special coating and surface treatment for highly corrosive applications; custom gear ratios outside the standard series range; and modified output shaft arrangements for unique implement drive layouts. Minimum order quantities apply for custom tooling; please contact the CMN engineering team with your technical requirements for a feasibility assessment and quotation.

Müşteri Yorumları

Alejandro Martinez, Wheat and Corn Farming, Argentina
"We farm about 1,400 ha of wheat and corn in the Pampas. Our Rauch spreader had the original gearbox worn out after six seasons and the Comer replacement price was just too high. Ordered two CMN T-281A units in January. They arrived in Buenos Aires in perfect shape, both splines matched exactly, and we bolted them in within an afternoon. Did the first oil change at around 55 hours per your instructions and the oil came out clean with just minimal fine metal dust. Two seasons later both are still working perfectly with no leaks."

Brad Taylor, Corn and Soybean Farming, United States
"Bought the 2.16:1 T-281A to replace the worn Comer on my Amazone ZA-TS 4200. The gearbox arrived in Ohio in about 11 days, well packed with no damage. Fit was spot on, no adapter needed. I've put about 320 hours on it across two corn and soybean fertilizing seasons and it has been absolutely trouble-free. Runs quiet, no leaks, the oil level check plug is easy to reach which the old one wasn't. Would buy again without question."

James Parker, Turf Management, United Kingdom
"We operate a lawn and sports turf maintenance business in Kent and need our spreaders running reliably throughout spring and autumn top-dressing seasons. The T-281A arrived within a week from Korea, which honestly surprised me. The aluminium housing is noticeably lighter than the old cast iron Comer which made the spreader easier to handle on the three-point. Quality of the splines and gear finish looks excellent to me. After about 180 hours it is performing exactly as expected, no complaints whatsoever."

Philippe Rousseau, Vineyard Maintenance, France
"I manage a vineyard in Burgundy and we use a centrifugal spreader to distribute granulated sulfur and limestone between the vine rows. The T-281A arrived in France in 9 days, with no damage during transport. The assembly took less than an hour because the dimensions perfectly match the original Comer. What impressed me the most is the solidity of the aluminum housing and the quality of the sealing. After 140 hours of service, there are no leaks and no abnormal noise. Very satisfied."

Scott Harrison, Agricultural Machinery, Australia
"I run a machinery dealership in New South Wales and stock the CMN T-281A as an affordable replacement for Comer gearboxes on Vicon and Bogballe spreaders popular here. Farmers love it because they can order through me locally rather than wait on expensive imported OEM parts. The ratio is exactly 2.16:1 as stated. Build quality has impressed my workshop technicians. In the past 18 months we've sold and installed over 30 of these units and have had zero warranty claims come back. CMN's after-sales support has also been very responsive when I've had a technical question."

Markus Becker, Crop Farming, Germany
"I farm about 900 ha in Bavaria and use centrifugal spreaders for base fertilization. When the Comer gearbox on my old spreader failed, I ordered the CMN T-281A as a replacement. Delivery to Munich took 10 days, and the packaging was absolutely fine. The installation took almost no time, as all dimensions are identical to the Comer. It runs very quietly, with no oil loss after 250 operating hours. The price-performance ratio is significantly better than the original replacement part. I will be converting more of my equipment."

Carlos Almeida, Sugarcane Production, Brazil
"We manage a large sugarcane estate in Sao Paulo state and use several tractor-mounted centrifugal spreaders for our NPK and lime programme. Replaced four old gearboxes with the T-281A last season. Delivery to Brazil took about 14 days by air freight which was acceptable given the price saving over OEM. All four gearboxes installed and running within two days. My mechanic says the quality of the aluminium casting and the gear finish are noticeably better than some Chinese alternatives we tried previously. Very happy with the decision to buy from CMN."

Gurpreet Singh, Rice and Wheat Farming, India
"I source equipment for a group of medium-scale rice and wheat farms in Punjab. We needed a reliable fertilizer spreader gearbox and contacted CMN through their website. The sales team responded within 24 hours, provided all technical drawings I asked for, and the shipment arrived in Amritsar in good condition within 12 days. The gearboxes have now been in service for about eight months through two fertilizing cycles. No failures, no issues with spline compatibility, and the oil check intervals recommended in the manual are easy for our operators to follow."

Mustafa Kaya, Citrus and Vegetable Fields, Turkey
"We are a cooperative of market garden farmers in Mersin, Turkey. We use centrifugal spreaders on citrus and vegetable fields and needed an affordable agricultural gearbox for fertilizer spreaders when the original Comer units reached the end of service life. The CMN T-281A came recommended by a fellow grower and I am glad we tried them. Compact, light, and the seal quality kept fertilizer dust completely out of the housing even after a dusty season. The CMN dealer also helped us identify the correct 80W-90 oil grade available locally. Fully satisfied customers here."