poros PTO pertanian<\/strong><\/a> ensures that each of the eight disc rotors spins at exactly the same speed throughout the cutting pass, resulting in a uniform windrow that ferments consistently and delivers high-quality feed energy throughout the winter feeding period.<\/p>\n4. Pengelolaan Padang Rumput
\nTopping and trimming managed pastures to remove rank, stemmy, or unpalatable growth, eliminate seed heads from weeds, and stimulate fresh palatable re-growth for grazing animals is a routine use where the discbine’s conditioning capability is less critical but the cutting speed and clean finish remain valuable. The slip clutch protection on this PTO shaft with slip clutch is particularly important during pasture work where concealed stones, fence stakes, and irrigation fittings may be hidden beneath the grass canopy. Without reliable overload protection, a single encounter with a buried obstruction at 184 mph blade tip speed can destroy the cutterbar gearbox assembly, making a properly functioning shear bolt PTO shaft or slip clutch an economic necessity.<\/p>\n
5. Roadside and Specialty Mowing
\nMaintaining roadsides, drainage ditches, airport buffer strips, and conservation headlands where a clean, controlled cut is required in irregular or sensitive areas represents a specialty application for the Hesston discbine. In these environments the double CV PTO drive shaft for discbine is especially valuable because the machine frequently operates at wide tractor-to-implement angles while following the contour of ditches and embankments. The 80-degree maximum articulation angle of the tractor-side CV half provides the geometric freedom to cut on steep side slopes and tight corners without inducing shaft vibration or joint overload, while the outer PTO shaft guard system provides mandatory safety protection when operating near public roads and pedestrian areas.<\/p>\n
6. Cover Crop Termination
\nCutting down winter cover crops such as cereal rye, vetch, crimson clover, or oats ahead of the planting season, leaving the biomass as a protective mulch layer, is a growing practice in conservation agriculture. The discbine’s high disc speed and conditioning rolls process the standing cover crop efficiently, laying it flat into a dense, even mat that suppresses early weed emergence and protects soil structure from rain impact. For this application, the operator typically disengages the conditioning rolls to avoid unnecessary power draw, placing the full torque load directly on the cutting circuit and demanding consistent RPM delivery from the 1000 PTO shaft driveline throughout the pass.<\/p>\n
![\"PTO](\"https:\/\/korea-transmission.com\/wp-content\/uploads\/2026\/04\/PTO-Shaft-for-Hesston-Disc-Mower-8.webp\")
<\/p>\n
How to Install PTO Shaft on Hesston Disc Mower<\/h2>\n
1. Safety and Preparation<\/strong>
\nBefore beginning installation, shut off the tractor engine completely and allow all rotating components to come to a full stop. Apply the tractor parking brake, remove the ignition key, and block the implement wheels. Verify that the new PTO shaft dimensions match your application by comparing the shaft PTO shaft length with the measured distance between the tractor PTO stub and the implement input shaft in the transport position. Confirm that the spline sizes match the tractor (1.375-21) and implement (1.5 x 23) specifications before proceeding.<\/p>\n2. Remove the Old Shaft<\/strong>
\nDetach the old disc mower PTO shaft by depressing the retaining collar on the tractor-end yoke and sliding it off the PTO stub shaft. Release the implement-end yoke from the discbine input shaft in the same manner. If the old shaft is seized or corroded on the splines, apply penetrating oil and allow it to soak for 20 minutes before gently tapping the yoke with a rubber mallet. Never use excessive force as this can damage the tractor PTO stub bearing or the implement input shaft seal. Dispose of the old shaft responsibly, or retain individual serviceable parts.<\/p>\n3. Prepare the Mating Splines<\/strong>
\nClean the tractor PTO stub shaft and the discbine input shaft with a wire brush to remove all rust, dried grease, crop residue, and corrosion. Inspect both splines for wear, chipping, or deformation that would prevent full engagement. Apply a light coat of high-quality grease (EP2 or equivalent) to both male splines before fitting the new shaft. Proper lubrication at the spline interface is critical for preventing fretting corrosion, which is the leading cause of spline seizure and accelerated wear in tractor PTO shaft connections under vibration and cyclic torque loads.<\/p>\n4. Mount the New PTO Shaft<\/strong>
\nConnect the implement-side yoke of the new PTO drive shaft for discbine to the Hesston input shaft first, ensuring the locking collar clicks positively into the retention groove. Then connect the tractor-side yoke to the tractor PTO stub, again confirming a positive collar lock. With both ends connected, push the telescoping PTO shaft tube sections together and check that the overlap zone is between one-third and two-thirds of the total inner tube length in the operating position to allow for both extension and compression during field operation.<\/p>\n5. Secure the Safety Guard<\/strong>
\nRefit the PTO shaft guard sections from the implement end toward the tractor, ensuring each guard section overlaps the next with the retention chains and anchor brackets properly fastened to prevent the guard from rotating with the shaft. The guard must be anchored at both ends and must not contact any part of the rotating assembly. Verify that the full-length PTO shaft cover provides complete enclosure from tractor to implement with no exposed gaps. Perform a visual inspection of the guard clearance through the full steering and terrain articulation range before starting the tractor.<\/p>\n6. Pre-Operation Test Run<\/strong>
\nStart the tractor and engage the PTO at low engine speed (approximately 50% throttle) for the first 2-3 minutes to allow all lubrication to distribute throughout the PTO shaft u joint needle bearing assemblies and CV joint ball tracks. Listen and observe for any unusual noise, vibration, or wobble that might indicate incorrect installation, misalignment, or an inadequate guard clearance. After the initial low-speed run, gradually increase to full 1000 RPM PTO speed and confirm smooth, vibration-free operation before deploying the machine for the first full cutting pass.<\/p>\n![\"PTO](\"https:\/\/korea-transmission.com\/wp-content\/uploads\/2026\/04\/PTO-Shaft-for-Hesston-Disc-Mower-5.webp\")
<\/p>\n
Tips Perawatan<\/h2>\n
1. Regular Greasing of CV Joints and U-Joints
\nThe PTO shaft u joint needle bearing assemblies and CV joint ball track grooves require fresh grease at intervals specified in CMN’s service manual, typically every 8-10 operating hours or at the start of each cutting season. Use high-pressure EP2 lithium grease with a grease gun through the Zerk fittings provided on each joint. Over-greasing is preferable to under-greasing in most field environments; purging slightly through the joint seals confirms the bearing cavity is fully packed. Neglecting this maintenance interval is the single most common cause of premature PTO shaft universal joint and CV joint failure in the field.<\/p>\n
2. Lubrication of the Telescoping Tube Section
\nThe inner and outer PTO shaft tubing sections must slide freely at all times to compensate for length changes during operation. Apply a generous coating of high-quality grease to the inner tube spline profile at the beginning of each season and mid-season under heavy use. Extend the tube fully, apply grease along the full spline length, then retract and extend several times to distribute the lubricant. Remove accumulated crop debris and dried mud from the tube overlap zone after each operating day to prevent grit contamination from acting as an abrasive and accelerating tube wear.<\/p>\n
3. Slip Clutch Setting Verification
\nThe slip clutch in this slip clutch PTO shaft should be inspected and its torque setting verified at the beginning of each season. Prolonged periods of inactivity can cause the friction plates to stick together from corrosion, setting the effective slip torque much higher than the rated value and negating overload protection. Conversely, worn friction discs will slip at torques below the rated value, causing nuisance slipping under normal load. CMN provides a torque verification procedure in the product documentation. Replace the friction disc set every 2-3 seasons under normal use or immediately if any visible damage is observed.<\/p>\n
4. Guard Inspection and Replacement
\nInspect the PTO shaft cover and outer guard sections before every use for cracks, missing sections, broken retention clips, or signs of the guard rubbing against the rotating assembly beneath. A guard that contacts the spinning shaft generates heat, wears through rapidly, and can become entangled in rotating components. In most jurisdictions, operating a tractor-mounted implement with a missing or damaged PTO shaft guard is a workplace safety violation with serious legal and financial consequences in addition to the immediate physical danger to the operator and any bystanders near the equipment.<\/p>\n
5. Seasonal Storage Preparation
\nAt the end of the cutting season, clean the entire PTO driveline shaft assembly with a pressure washer at low pressure from a safe distance, then allow to dry completely before applying a fresh coat of grease to all external metal surfaces to prevent rust formation during storage. Disconnect the shaft from both the tractor and the implement and store it horizontally in a dry location away from UV exposure, which causes plastic guard sections to become brittle. Extend the telescoping tube to the full-open position during storage to prevent the inner and outer sections from seizing together due to corrosion.<\/p>\n
![\"PTO](\"https:\/\/korea-transmission.com\/wp-content\/uploads\/2026\/04\/PTO-Shaft-for-Hesston-Disc-Mower-6.webp\")
<\/p>\n
Common Troubleshooting of Disc Mower PTO Shaft<\/h2>\n
1. Getaran Berlebihan Selama Pengoperasian<\/strong>
\nCause: Worn or seized PTO shaft u joint needle bearings; misaligned yoke phasing; collapsed inner tube bushings; or shaft operating outside its designed angle range. Solution: Grease all joints immediately. If vibration persists after greasing, disassemble each CV joint and inspect needle bearing cups for spalling or race damage. Check that both yoke forks at either end of each shaft section are in phase (aligned in the same plane). Replace the complete joint kit if any component shows measurable radial play or scoring of the bearing cup.<\/p>\n2. Slip Clutch Slipping Under Normal Load<\/strong>
\nCause: Friction plates contaminated with oil or grease from a leaking PTO shaft yoke seal; worn friction disc linings reducing effective friction coefficient; spring compression set reducing clamping force. Solution: Remove and inspect all friction discs and pressure plates. Clean away contamination with brake cleaner solvent; replace any disc showing visible glazing, cracking, or thickness below the service limit. Check spring free length against specification. This shear bolt PTO shaft alternative relies entirely on friction plate condition for correct function, making periodic disc inspection mandatory on this type of clutch design.<\/p>\n3. Shaft Will Not Telescope (Seized Inner\/Outer Tube)<\/strong>
\nCause: Dried crop debris, soil, or rust fouling the PTO shaft tube overlap zone; lack of lubrication causing metal-to-metal contact and galvanic bonding between the inner and outer steel PTO shaft tubing sections. Solution: Apply penetrating oil along the full tube overlap length and allow it to soak for at least 30 minutes. Attempt to work the tube free with gentle rotational and axial force using padded jaw pliers. If the tube remains seized, the assembly must be replaced. After repair, maintain a strict greasing schedule to prevent recurrence. This failure mode is entirely preventable with proper seasonal maintenance.<\/p>\n4. Yoke Will Not Engage or Stay on Tractor PTO Stub<\/strong>
\nCause: Worn or broken collar retention spring in the PTO shaft yoke; spline wear on either the shaft yoke bore or the tractor stub shaft allowing the yoke to disengage under torque. This is a safety-critical issue that can result in the shaft separating from the tractor at speed. Solution: Replace the retention spring and collar assembly immediately. Inspect the tractor stub splines for wear; if the tractor splines are worn, the tractor manufacturer should be consulted regarding stub shaft replacement. Do not operate with an improperly retained tractor PTO drive shaft connection under any circumstances.<\/p>\n5. Unusual Clunking or Knocking Sound<\/strong>
\nCause: Worn PTO shaft universal joint or CV joint with excessive radial or axial play causing the bearing cups to clunk against the yoke bore at each revolution under load; sheared internal snap rings allowing joint components to contact the yoke bore. Solution: Stop operation immediately and inspect all joints for radial play by grasping each shaft section and attempting to rock it in all directions with the PTO disengaged. Any measurable play in a joint indicates bearing failure requiring immediate replacement of the affected PTO shaft parts kit. Continuing to operate with a failed joint will rapidly damage the yoke bore and may lead to complete shaft separation.<\/p>\n![\"PTO](\"https:\/\/korea-transmission.com\/wp-content\/uploads\/2026\/04\/PTO-Shaft-for-Hesston-Disc-Mower-7.webp\")
<\/p>\n
Disc Mower PTO Shaft and Disc Mower Gearbox<\/h2>\n
The disc mower PTO shaft, also referred to as the PTO driveline shaft for disc mower, is the mechanical link between the tractor’s rear power take-off output and the disc mower’s central input gearbox. It performs three critical functions simultaneously: transmitting high torque at 1000 RPM, accommodating the constantly changing angular and linear relationship between the tractor and implement, and protecting the entire driveline against shock overloads through the integrated slip clutch. Without a properly functioning agricultural PTO shaft, the disc mower gearbox receives no input power and the machine is completely inoperable regardless of the condition of its internal components. The PTO shaft for Hesston disc mower models must therefore be viewed not as a commodity consumable but as a primary drivetrain component whose specification, condition, and maintenance directly determine the reliability and productivity of the entire machine.<\/p>\n
The disc mower gearbox, sometimes called the cutterbar input gearbox or the central gearbox, is the mechanical heart of the disc mower itself. It receives the 1000 RPM input from the PTO drive shaft, steps it up to the much higher rotational speed required by the cutting discs (2,600 RPM in the case of the Hesston 1340\/1345), and distributes this power along the full width of the sealed oil-bath cutterbar to each of the eight disc rotor assemblies in sequence. The gearbox typically incorporates a set of bevel input gears, an intermediate shaft running along the length of the cutterbar, and a series of spur or bevel gears at each disc station. A separate gear train typically branches off to drive the conditioning rolls through a further speed-reduction stage to achieve the correct conditioning roll surface speed relative to the crop feed rate.<\/p>\n
The performance of the disc mower gearbox is entirely dependent on the quality and condition of the PTO drive shaft for discbine supplying it. A worn or misaligned tractor PTO shaft that produces torsional vibration delivers a pulsating input torque to the gearbox bevel gears that causes accelerated tooth wear, bearing fatigue, and premature seal failure. This vibration-induced wear is often incorrectly diagnosed as a gearbox defect when the root cause is actually the upstream PTO shaft u joint or CV joint condition. Similarly, a slip clutch that is seized and unable to protect against shock loads will transmit every rock strike and sudden jam directly through the gearbox, leading to bent input shafts, cracked housings, and sheared internal gear keys. Conversely, a perfectly maintained gearbox filled with fresh oil but driven through a failing disc mower PTO shaft will still fail prematurely. This is why CMN Transmission recommends treating the PTO shaft for Hesston discbine and the disc mower gearbox as a matched maintenance pair: inspect both at the same service interval, replace both when significant wear is detected in either component, and always prime a freshly overhauled gearbox with a new or inspected PTO driveline shaft to avoid immediately contaminating the new gearbox with vibration-induced stress cycles from a worn driveline.<\/p>\n
CMN Transmission supplies both PTO shaft parts and disc mower gearbox assemblies for the Hesston 1340 and 1345 platform, allowing operators and dealers to source a complete matched drivetrain solution from a single supplier with the confidence of consistent quality certification, dimensional accuracy, and technical support. Contact our agricultural sales team to discuss a combined driveline package tailored to your specific machine configuration and operating hours.<\/p>\n
![\"Disc](\"https:\/\/korea-transmission.com\/wp-content\/uploads\/2026\/04\/0_Disc-Mower-Gearbox-1.webp\")
<\/p>\n
Why Choose CMN Transmission’s Agricultural PTO Shafts?<\/h2>\n
CMN Transmission (Korea) stands as one of the world’s leading suppliers of industrial and agricultural power transmission solutions, with a product range spanning PTO drive shafts, agricultural gearboxes, hydraulic cylinders, planetary gearboxes, worm gearboxes, bevel gears, chain sprockets, chains, gear racks, pulleys, taper bushes, couplings, and more. Headquartered in Ansan-si, Gyeonggi-do, Korea, with a production base and over 10 shareholding cooperative factories, we maintain an inventory of more than 150,000 standard stock products and serve customers in over 53 countries across North America, Europe, South America, the Middle East, Africa, Southeast Asia, and Oceania.<\/p>\n
Yang membedakan CMN Transmission di pasar poros PTO pertanian adalah komitmen kami terhadap harga langsung dari pabrik tanpa mengorbankan kualitas. Sebagai perusahaan manufaktur dan perdagangan terintegrasi, kami menghilangkan berbagai markup dealer yang menaikkan biaya suku cadang pengganti OEM. Setiap poros PTO traktor yang kami produksi dibuat menggunakan desain CAD canggih, pemesinan CNC presisi, proses perlakuan panas modern, dan pengujian kualitas yang ketat. Produk kami memiliki sertifikasi ISO dan CE, yang memastikan kepatuhan terhadap standar keselamatan dan kinerja internasional.<\/p>\n
Di luar kualitas produk, kami menawarkan tingkat dukungan pelanggan yang seringkali tidak dapat ditandingi oleh merek OEM besar. Tim teknis kami menyediakan konsultasi pra-penjualan untuk mengkonfirmasi konfigurasi spline, panjang poros, dan spesifikasi kopling untuk kombinasi traktor dan implement Anda yang tepat. Kami menawarkan suku cadang poros PTO yang disesuaikan untuk aplikasi non-standar dan menyediakan gambar dimensi terperinci berdasarkan permintaan. Setelah penjualan, layanan purna jual terpadu kami memastikan bahwa komponen pengganti, panduan teknis, dan dukungan garansi selalu tersedia. Ketika Anda memilih CMN Transmission, Anda memilih mitra yang berkomitmen untuk menjaga agar peralatan Anda beroperasi secara efisien, andal, dan aman, musim demi musim.<\/p>\n
![\"Peralatan](\"https:\/\/korea-transmission.com\/wp-content\/uploads\/2026\/03\/Factory-Equipment-3.webp\")
![\"Peralatan](\"https:\/\/korea-transmission.com\/wp-content\/uploads\/2026\/03\/Factory-Equipment-1.webp\")
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Pertanyaan yang Sering Diajukan (FAQ)<\/h2>\n
Q: What PTO shaft size does the Hesston 1340 and 1345 discbine require?<\/strong>
\nA: The Hesston 1340 and 1345 discbine uses a CAT 6 Double Constant Velocity PTO driveline shaft classified as the Weasler 55N series. The PTO shaft sizes are 1.375 inch (1-3\/8 inch) with 21 splines on the tractor connection end and 1.5 inch (1-1\/2 inch) with 23 splines on the implement input end. The CV joint configuration is 55N with an 80-degree articulation range on the tractor side and 50 degrees on the implement side. This double CV design is mandatory for smooth power delivery at the wide steering angles required by this drawbar-mounted machine. Any replacement agricultural PTO shaft must match these exact PTO shaft dimensions to ensure proper fit and function.<\/p>\nQ: Is this PTO shaft a direct replacement for the Weasler 55N series on the Hesston discbine?<\/strong>
\nA: Yes. CMN’s disc mower PTO shaft is engineered specifically as a replacement of Weasler PTO shaft hardware for the Hesston 1340 and 1345 platform. All critical dimensions including spline profiles, yoke bore sizes, CV joint geometry, and overall shaft length ranges are matched to the original Weasler 55N specifications. The shaft installs on the tractor PTO stub and the discbine input shaft without any modification, adapter, or machining. The locking collar geometry, guard section profiles, and chain anchor points are also dimensionally compatible with the original Hesston installation. CMN recommends confirming your specific machine’s serial number and build specification with our technical team before ordering if you have a machine with factory modifications or non-standard options.<\/p>\nQ: What is the difference between a 540 PTO shaft and a 1000 PTO shaft for the Hesston discbine?<\/strong>
\nA: A 540 PTO shaft operates at 540 RPM and is the traditional standard for lighter implements requiring up to approximately 65-80 horsepower. A 1000 PTO shaft operates at 1000 RPM and is the correct specification for heavier, high-power implements like the Hesston 1340 and 1345, which require 85-100+ hp to drive the 12-foot cutterbar, eight disc rotors at 2,600 RPM, and conditioning rolls simultaneously. The Hesston 1340 and 1345 are designed primarily as 1000 rpm PTO shaft machines. The stub shaft size differs: 540 RPM PTO stubs use a 1-3\/8 inch 6-spline or 21-spline profile, while 1000 RPM stubs typically use the larger 1-3\/4 inch 20-spline profile on some tractors – however, the Hesston’s input uses the 1.5 x 23 spline interface to accommodate the required torque level regardless of the tractor stub configuration.<\/p>\nQ: How do I determine the correct PTO shaft length for my Hesston 1340\/1345?<\/strong>
\nA: To determine the correct PTO shaft length, park the tractor and implement in a straight line on level ground and measure the distance between the tractor PTO stub shaft face and the discbine input shaft face. The ideal telescoping assembly should have approximately one-third of its total overlap remaining in the extended (straight-line) working position. This allows the shaft to compress during tight turns and to extend when the hitch reaches its maximum separation. CMN’s technical team can advise on the correct collapsed and extended length range for your specific tractor-to-implement configuration based on the measured gap, your tractor model, and the Hesston hitch geometry. Never operate a shaft that is at the end of its telescoping travel in either direction, as this can cause bottoming or separation failure.<\/p>\nQ: Can I order just the tractor-side or implement-side CV half shaft instead of the complete assembly?<\/strong>
\nA: Yes, CMN Transmission stocks all individual PTO shaft parts as separate line items. If your inspection reveals that only one end of the shaft is worn or damaged, you can order specifically the 55N 80-degree CV half for the tractor side (1.375-21 spline) or the 55N 50-degree CV half for the implement side (1.5 x 23 spline) and mate it with your existing serviceable half. This modular approach is one of CMN’s key advantages over suppliers who only offer complete assemblies. Contact our technical team with your existing assembly condition and we will advise which half requires replacement and confirm the correct PTO shaft adapter interface to ensure both halves are compatible at the central coupling point.<\/p>\nQ: How does the slip clutch PTO shaft protect my Hesston discbine and tractor?<\/strong>
\nA: The slip clutch PTO shaft contains a stack of friction discs maintained under spring pressure between a drive plate connected to the tractor side and a driven plate connected to the implement side. Under normal operation, friction keeps both plates locked together, transmitting full torque. When the cutterbar hits an obstruction that causes a torque spike above the clutch’s set limit, the friction plates slip against each other, absorbing the shock as heat and preventing that destructive impulse from reaching the discbine’s input gearbox or the tractor’s transmission. This mechanism is significantly more effective than a shear pin PTO shaft or PTO shaft shear bolt system for disc mower applications because it re-engages automatically without requiring the operator to stop, exit the cab, and replace a shear pin before resuming mowing, saving significant downtime during a time-critical hay harvest window.<\/p>\nQ: Why does the Hesston discbine require a Double CV PTO shaft rather than a standard cardan shaft?<\/strong>
\nA: The Hesston 1340 and 1345 use a drawbar swivel hitch with hydraulic tongue swing that allows the machine to be steered to wide angles relative to the tractor during headland turns and contour mowing. A standard cardan (universal joint) PTO drive shaft produces significant rotational velocity fluctuation when operated at angles above approximately 8-10 degrees: the output shaft accelerates and decelerates twice per revolution at the same frequency as the input speed. At 1000 RPM and the wide angles inherent to discbine operation, this velocity fluctuation creates severe torsional vibration in the cutterbar gearbox. The Double CV design cancels this fluctuation mathematically, delivering a perfectly smooth 1000 RPM output at all operating angles up to the rated limits of each CV joint, which is the fundamental reason the Hesston OEM specification requires this shaft type rather than a simpler and cheaper cardan design.<\/p>\nQ: How often should I replace the PTO shaft universal joint kits on the Hesston discbine driveline?<\/strong>
\nA: Under normal operating conditions and with regular greasing at 8-10 hour intervals, the PTO shaft universal joint and CV joint assemblies in this driveline should last between 600 and 1,000 operating hours before replacement is necessary. However, joint condition varies enormously depending on operating angle, lubrication discipline, and whether any shock events have occurred. At the start of every season, check each joint for radial play by gripping either side and attempting to rock it – any detectable play indicates bearing wear and the joint should be replaced before the season begins. Replacement PTO shaft u joint kits are available individually from CMN, allowing targeted replacement of worn joints without purchasing an entire new custom PTO shaft assembly.<\/p>\nQ: Does CMN offer custom PTO shaft configurations for non-standard Hesston or other discbine models?<\/strong>
\nA: Yes. CMN Transmission offers custom PTO shaft manufacturing for non-standard configurations including modified shaft lengths, alternative spline profiles, different torque ratings, and OEM-branded assemblies for agricultural equipment manufacturers. Our engineering team works from customer-supplied dimensional drawings or physical samples to produce custom PTO shaft dimensions and configurations that are not available as standard catalog items. This service is particularly useful for operators with modified tractor-implement combinations, for dealers who require private-label tractor PTO shafts, and for implement manufacturers who need a competitively priced OEM supply chain for their own equipment lines. Contact CMN’s agricultural sales team with your specification requirements for a custom quote and typical production lead time.<\/p>\nQ: What is the minimum tractor horsepower required to run the Hesston 1340\/1345 with this PTO shaft?<\/strong>
\nA: The Hesston 1340 and 1345 require a minimum of approximately 85 hp (63 kW) at the PTO, with 100+ hp recommended for optimal performance in heavy or wet crops. The tractor PTO drive shaft itself imposes no additional power demand beyond the implement requirements, but selecting the correct tractor power level is important for keeping the 1000 rpm PTO shaft running at its rated speed under the full cutting load of 8 discs at 2,600 RPM plus the conditioning rolls. Underpowered tractors will cause the PTO to drop below 1000 RPM in heavy crop, reducing cut quality, increasing power consumption, and placing higher torque stress on the driveline components. The drawbar capacity and hydraulic output of the tractor must also be sufficient to support the machine’s 5,300-6,500 lb operating weight and hydraulic tongue swing requirements.<\/p>\n![\"Poros](\"https:\/\/korea-transmission.com\/wp-content\/uploads\/2026\/04\/PTO-Shaft-for-Hesston-Discbine-12.webp\")
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Ulasan Pelanggan<\/h2>\n
Marcus Hollingsworth, Manajer Pertanian, Amerika Serikat<\/strong>
\n“We run a 1345 discbine on about 800 acres of alfalfa every year. The original Weasler shaft finally gave out after six seasons and I needed something fast – couldn’t wait three weeks for the dealer to get parts in. Found CMN online, ordered the 55N 80×50 Double CV replacement, and it shipped from Korea within two days. Arrived in perfect condition, slid straight onto the 1.375-21 spline without any fuss, and we were cutting the same week again. That was two full seasons ago now, and it’s still running perfectly. Honestly, better quality than I expected for the price.”<\/p>\nJohann Kiesewetter, Farmer, Germany<\/strong>
\n“I ordered the PTO drive shaft kit for our Hesston 1340 and am very satisfied. CMN\u2019s technical support confirmed the exact dimensions by email before the purchase\u2014this was important because I was unsure whether the PTO shaft length would fit. The shaft arrived in the correct length, all splines were perfect, and the quality of the CV joints is clearly better than the cheap replacement part I had previously purchased from a local dealer. It has now been running smoothly and without vibrations for 200 operating hours. I highly recommend it.”<\/p>\nTyler Beaumont, Farm Owner, Canada<\/strong>
\n“Running a mixed hay and silage operation in Ontario, we go hard on equipment from May through September. Our Hesston discbine PTO shaft broke during the first cut this spring – snapped a CV joint yoke right at the weld. I needed a replacement fast. CMN had the complete 55N Double CV assembly in stock, shipped it DHL, and I had it in hand within 5 business days. The build quality is excellent. The guard sections fit together properly without gaps, the slip clutch adjuster is accessible, and the tube telescopes smoothly. We’ve put over 300 hours on it since May without a single issue. Price was about 35% less than the dealer quoted for a Weasler replacement.”<\/p>\nHamish Sutherland, Agricultural Contractor, New Zealand<\/strong>
\n“Down here in Canterbury we run a 1345 for contract mowing ryegrass and clover. The terrain is mostly flat but we cover a lot of ground – probably 2,000 hectares a season. I was skeptical about ordering a PTO shaft parts kit from Korea but a mate who uses CMN for gearboxes convinced me to give it a go. Ordered the implement-side 50-degree CV half to replace just the worn end, saved quite a bit over buying a whole new shaft. The 1.5 x 23 spline fit was spot on, no wobble whatsoever. CMN sent dimensional drawings before I ordered to confirm the fit – that kind of technical support is rare and really appreciated. Solid company.”<\/p>\nBertrand Fontaine, Farm Operator, France<\/strong>
\n“Our farm produces alfalfa hay in Beauce and we have a Hesston 1340 that we have been using for several years. The original power take-off shaft failed after four seasons and we ordered the replacement from CMN Transmission. Delivery took approximately one week to France, the packaging was solid, and the dimensions correspond exactly to the machine\u2019s specifications. What really impressed me is the quality of the constant velocity joints\u2014they are visibly better finished than the original part. No vibrations since installation. I recommend CMN to any farmer seeking a serious alternative to the excessively high prices of original parts.”<\/p>\nBrett Mackenzie, Workshop Manager, Australia<\/strong>
\n“I manage a small agricultural machinery dealership and workshop in Queensland and I’ve started stocking CMN PTO shaft kits as an alternative to OEM parts for our customers with Hesston discbines. The quality is genuinely very good – on par with what we’d get from official channels at significantly better pricing. We’ve fitted probably eight of these shafts over the past year and a half and haven’t had a single warranty return. One customer specifically commented that the guard cover on the CMN shaft was actually better fitting than his original. Lead times on special orders are also very reasonable. I’ll continue to recommend these to my customers.”<\/p>\nRobert Clarkson, Agricultural Contractor, United Kingdom<\/strong>
\n“We use a Hesston 1345 for contracting across the Yorkshire Dales and the shaft takes a real beating with the terrain we work on – plenty of tight headland turns and sloping ground. The slip clutch protection on the CMN shaft has already saved us at least twice from what could have been serious cutterbar damage when we clipped buried stones. It slipped cleanly and re-engaged without fuss both times. The 80-degree CV angle on the tractor side handles our steepest slopes without any vibration. Very happy with the product. Customer service answered my pre-sale questions about shaft length and spline compatibility within a few hours which made me confident to place the order.”<\/p>\nPieter Berg, Dairy Farmer, Netherlands<\/strong>
\n“We mow clover and grass on approximately 500 hectares per year in the Gelderse Vallei. The original Weasler drive shaft failed after four seasons at the sliding coupling. CMN delivered the replacement quickly\u2014within one week in the Netherlands. Installation was straightforward, the 1.375-21 splines fitted directly, and the drive shaft has now been running smoothly for one and a half seasons without any vibration or noise. The price is very competitive compared to what we are accustomed to from the dealer. What I also appreciate is that the half shafts can be ordered separately if parts wear out\u2014this represents significant savings in the long term.”<\/p>\nCarlos Ferreira, Agricultural Service Provider, Brazil<\/strong>
\n“I provide agricultural contracting services for grass cutting and silage in the interior of Minas Gerais, and we have a Hesston 1340 that we use during the harvest season. The original part was exhibiting excessive vibration, so we ordered the complete CAT 6 Double CV cardan shaft from CMN. The product arrived well packaged, the material quality is visibly superior to what I expected from an Asian supplier, and the coupling to the tractor\u2019s power take-off was perfect on the 1.375-21 spline. We have accumulated approximately 400 hours of heavy cutting of Napier grass and Brachiaria without any problems. CMN\u2019s pre-sale service was very attentive and responded quickly to all my technical questions by email.”<\/p>","protected":false},"excerpt":{"rendered":"Looking for a heavy-duty replacement PTO shaft for Hesston Discbine 1340 and 1345 disc mower models? CMN Transmission delivers a precision-engineered CAT 6 Double Constant Velocity agricultural PTO shaft purpose-built to match OEM specifications. Featuring a 1.375-21 tractor-side spline and 1.5″ x 23 implement-side spline with a 55N 80×50 Double CV joint design, this disc mower PTO shaft is the most reliable direct replacement for the original Weasler 55N series driveline.<\/p>","protected":false},"featured_media":7053,"comment_status":"open","ping_status":"closed","template":"","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":""},"product_brand":[],"product_cat":[262,222],"product_tag":[232,228,242,234,264,233,226,229,263,265,235,243,225,230,231,224],"class_list":{"0":"post-7055","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-pto-shaft-for-discbine","7":"product_cat-pto-shafts","8":"product_tag-1000-pto-shaft","9":"product_tag-540-pto-shaft","10":"product_tag-agricultural-pto-shaft","11":"product_tag-custom-pto-shaft","12":"product_tag-disc-mower-pto-shaft","13":"product_tag-heavy-duty-pto-shaft","14":"product_tag-pto-drive-shafts","15":"product_tag-pto-driveline-shaft","16":"product_tag-pto-shaft-for-disc-mower","17":"product_tag-pto-shaft-for-discbine","18":"product_tag-pto-shaft-for-tractor","19":"product_tag-pto-shaft-manufacturers","20":"product_tag-pto-shafts","21":"product_tag-pto-shafts-for-sale","22":"product_tag-tractor-pto-drive-shaft","23":"product_tag-tractor-pto-shaft","25":"first","26":"instock","27":"shipping-taxable","28":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/korea-transmission.com\/id\/wp-json\/wp\/v2\/product\/7055","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/korea-transmission.com\/id\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/korea-transmission.com\/id\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/korea-transmission.com\/id\/wp-json\/wp\/v2\/comments?post=7055"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/korea-transmission.com\/id\/wp-json\/wp\/v2\/media\/7053"}],"wp:attachment":[{"href":"https:\/\/korea-transmission.com\/id\/wp-json\/wp\/v2\/media?parent=7055"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/korea-transmission.com\/id\/wp-json\/wp\/v2\/product_brand?post=7055"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/korea-transmission.com\/id\/wp-json\/wp\/v2\/product_cat?post=7055"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/korea-transmission.com\/id\/wp-json\/wp\/v2\/product_tag?post=7055"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
![\"Poros](\"https:\/\/korea-transmission.com\/wp-content\/uploads\/2026\/04\/PTO-Shaft-for-Hesston-Discbine-1.webp\")
<\/p>\n![\"PTO](\"https:\/\/korea-transmission.com\/wp-content\/uploads\/2026\/04\/0_PTO-Shaft-for-Disc-Mower-2.webp\")
<\/p>\n![\"PTO](\"https:\/\/korea-transmission.com\/wp-content\/uploads\/2026\/04\/PTO-Shaft-for-Hesston-Disc-Mower-13.webp\")
<\/p>\n![\"PTO](\"https:\/\/korea-transmission.com\/wp-content\/uploads\/2026\/04\/PTO-Shaft-for-Hesston-Disc-Mower-11.webp\")
<\/td>\n![\"PTO](\"https:\/\/korea-transmission.com\/wp-content\/uploads\/2026\/04\/PTO-Shaft-for-Hesston-Disc-Mower-10.webp\")
<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n