{"id":1278,"date":"2026-08-21T08:23:55","date_gmt":"2026-08-21T08:23:55","guid":{"rendered":"https:\/\/foragebaler.com\/square-baler-horsepower-requirements-complete-hp-guide-for-all-9yf-models\/"},"modified":"2026-08-21T08:23:55","modified_gmt":"2026-08-21T08:23:55","slug":"square-baler-horsepower-requirements-complete-hp-guide-for-all-9yf-models","status":"publish","type":"post","link":"https:\/\/foragebaler.com\/ja\/square-baler-horsepower-requirements-complete-hp-guide-for-all-9yf-models\/","title":{"rendered":"\u89d2\u578b\u30d9\u30fc\u30e9\u30fc\u306e\u5fc5\u8981\u99ac\u529b\uff1a9YF\u5168\u30e2\u30c7\u30eb\u5bfe\u5fdc\u306e\u5b8c\u5168\u99ac\u529b\u30ac\u30a4\u30c9"},"content":{"rendered":"
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Technical Reference \u00b7 9YF Series \u00b7 Updated August 2026<\/p>\n

Square Baler Horsepower Requirements<\/h1>\n

A small square baler requires between 40HP and 140HP at the PTO<\/strong>, depending on the model and crop type. The 9YF-1700 pairs with 40\u201355HP compact tractors; the shredder models (9YF-2200S and 9YFS-2.2) require a minimum of 99HP. Running a baler below its rated PTO horsepower causes PTO speed to fall under 540rpm \u2014 shifting knotter timing and producing missed ties. This guide gives you the exact HP figure for every 9YF model, explains the critical difference between engine HP and PTO HP, and shows how crop density affects your real HP requirement in the field.<\/p>\n

Covers: HP by model \u00b7 PTO HP vs engine HP \u00b7 HP demand by crop \u00b7 calculating tractor suitability \u00b7 symptoms of insufficient HP<\/p>\n

\n Browse 9YF Square Balers by Horsepower Range<\/a>
\n Request a Square Baler HP Tractor Match Consultation<\/a>\n <\/div>\n<\/p><\/div>\n<\/div>\n

<\/p>\n

\n
Quick Answer<\/div>\n

A square baler needs a minimum of 40HP at the PTO<\/strong> for entry-level models and 99HP or more<\/strong> for shredder models baling dense crops. Use PTO horsepower figures \u2014 not engine horsepower \u2014 for accurate tractor matching. Engine HP is typically 10\u201315% higher than PTO HP due to driveline losses.<\/p>\n

\n 9YF-1700 \u2192 40HP min<\/span>
\n 9YF-1900 \u2192 50HP min<\/span>
\n 9YF-2200 \u2192 50HP min<\/span>
\n 9YF-2200S \u2192 99HP min<\/span>
\n 9YFS-2.2 \u2192 99HP min<\/span>\n <\/div>\n<\/div>\n

<\/p>\n

PTO Horsepower vs Engine Horsepower: Why the Difference Matters<\/h2>\n

When a manufacturer states that a square baler requires 50HP, they mean 50HP measured at the PTO output shaft<\/strong> \u2014 not at the engine. This distinction is critical because most tractor dealerships advertise engine horsepower (also called gross HP), which is measured at the crankshaft before the transmission and hydraulic systems take their share of the power.<\/p>\n

PTO horsepower is consistently 10\u201315% lower than engine horsepower on modern tractors. A tractor marketed as 60HP (engine) delivers approximately 52\u201355HP at the PTO under field conditions. Matching your tractor to a baler using the wrong HP figure leads to a machine that is under-powered in the field even though the numbers looked adequate on paper.<\/p>\n

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Definition: PTO Horsepower<\/div>\n

PTO horsepower is the usable power available at the power take-off shaft on the rear of the tractor \u2014 the shaft that connects directly to the baler gearbox. It is measured after the engine has powered the transmission, hydraulic pump, cooling fan and other auxiliary systems. PTO HP is the only figure relevant to baler tractor matching.<\/p>\n

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Conversion (approximate):<\/strong> PTO HP = Engine HP \u00d7 0.85<\/div>\n
\u4f8b\uff1a<\/strong> 65HP engine tractor \u2192 ~55HP PTO<\/div>\n
Best practice:<\/strong> always check the tractor spec sheet for the certified PTO HP figure<\/div>\n<\/p><\/div>\n<\/div>\n

<\/p>\n

Square Baler HP Requirements by Model \u2014 Full 9YF Range<\/h2>\n

\"9YF-2200<\/p>\n

\n\n\n\n\n\n\n\n\n\n
\u30e2\u30c7\u30eb<\/th>\nMinimum PTO HP<\/th>\n\u63a8\u5968PTO\u99ac\u529b<\/th>\nComfortable HP Range<\/th>\n\u30d4\u30c3\u30af\u30a2\u30c3\u30d7\u30bf\u30a4\u30d7<\/th>\nTypical Tractor Match<\/th>\n<\/tr>\n<\/thead>\n
9YF-1700<\/td>\n40 HP<\/td>\n50\u99ac\u529b<\/td>\n50\uff5e65\u99ac\u529b<\/td>\nSpring-tooth<\/td>\nCompact utility 45\u201370HP engine<\/td>\n<\/tr>\n
9YF-1900<\/td>\n50\u99ac\u529b<\/td>\n60 HP<\/td>\n60\u201375 HP<\/td>\nSpring-tooth<\/td>\nCompact utility or mid-size 55\u201385HP engine<\/td>\n<\/tr>\n
9YF-2200<\/td>\n50\u99ac\u529b<\/td>\n65\u99ac\u529b<\/td>\n65\u201385 HP<\/td>\nSpring-tooth<\/td>\nMid-size utility 60\u2013100HP engine<\/td>\n<\/tr>\n
9YF-2200S<\/td>\n99 HP<\/td>\n115 HP<\/td>\n110\u2013130 HP<\/td>\nHammer-claw + shredder<\/td>\nFull-size row-crop 115\u2013150HP engine<\/td>\n<\/tr>\n
9YFS-2.2<\/td>\n99 HP<\/td>\n125 HP<\/td>\n120\uff5e145\u99ac\u529b<\/td>\nHammer-claw + dual shredder + fan<\/td>\nLarge row-crop or articulated 130\u2013160HP engine<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

All HP figures refer to PTO horsepower at rated engine speed. Engine HP will be 10\u201315% higher. Source: 9YF series operator specifications, America Ever-Power Forage Baler Equipment INC.<\/p>\n

<\/p>\n

Why the Gap Between Minimum and Recommended HP Matters<\/h2>\n

The minimum HP rating represents the power required to operate the baler mechanism at rated PTO speed (540rpm) in ideal conditions \u2014 light, dry, uniform windrows on flat ground. The recommended HP figure is the power required to maintain 540rpm PTO speed during the most demanding field conditions you will realistically encounter: dense first-cut alfalfa windrows, humid heavy hay, uphill grades, or high-density bale settings.<\/p>\n

Operating at minimum HP is not a problem when conditions are genuinely light. It becomes a problem when conditions vary within the same field \u2014 as they always do in practice. A tractor at exactly the minimum HP limit may handle half the field at an acceptable PTO speed but begin to lag on the heavier sections, causing knotter timing problems that appear to be mechanical faults when the actual cause is insufficient tractor power for that windrow density.<\/p>\n

\n
\n
Running at Minimum HP<\/div>\n

Acceptable in ideal conditions. PTO speed may fluctuate in denser sections, requiring reduced forward speed to maintain 540rpm. Less margin for operator error, terrain variation or changing windrow density.<\/p>\n<\/p><\/div>\n

\n
Running at Recommended HP<\/div>\n

PTO speed stays at 540rpm throughout varied windrow densities. Allows higher forward speed in standard sections. Engine has reserve for grade changes. Knotter timing is stable across all field conditions.<\/p>\n<\/p><\/div>\n

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Running at Comfortable HP Range<\/div>\n

Full productivity on the most challenging crops (dense first-cut alfalfa, corn stover, wet-weight bermudagrass). High forward speed in standard windrows. Long-term engine longevity from reduced sustained-load operation.<\/p>\n<\/p><\/div>\n<\/div>\n

<\/p>\n

HP Demand by Crop and Windrow Condition<\/h2>\n

HP demand at the PTO is not fixed \u2014 it varies with the crop type, windrow density, bale compression setting and moisture level. The same model baler operating at the same forward speed can require 20\u201340% more HP in a dense first-cut alfalfa windrow than in a light dry straw windrow. Understanding your peak demand crop is the correct basis for tractor matching \u2014 not your average or typical windrow.<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n
Crop \/ Windrow Condition<\/th>\nRelative HP Demand<\/th>\nEffect on Tractor Pairing<\/th>\n<\/tr>\n<\/thead>\n
Dry straw \u2014 light windrow<\/td>\n\u4f4e\u3044<\/strong> \u2014 near minimum rated HP<\/td>\nA minimum-HP tractor performs well. Forward speed is limited by windrow volume, not power.<\/td>\n<\/tr>\n
Standard grass hay \u2014 uniform windrow<\/td>\n\u9069\u5ea6<\/strong> \u2014 80\u201390% of rated HP<\/td>\nStandard operating condition. Minimum-HP tractor acceptable with moderate forward speed. Recommended HP delivers higher productivity.<\/td>\n<\/tr>\n
Bermudagrass \u2014 dense SE summer cut<\/td>\nModerate\u2013High<\/strong> \u2014 85\u201395% of rated HP<\/td>\nFine stems pack efficiently. Higher HP allows higher forward speed in the narrow baling window.<\/td>\n<\/tr>\n
Alfalfa \u2014 2nd or 3rd cut<\/td>\n\u9ad8\u3044<\/strong> \u2014 90\u2013100% of rated HP<\/td>\nThinner windrow than first cut but high density. Minimum-HP tractor must reduce forward speed significantly in peak-density sections.<\/td>\n<\/tr>\n
Alfalfa \u2014 1st cut, full stand<\/td>\nPeak demand<\/strong> \u2014 at or above rated HP<\/td>\nUse recommended HP or above. Minimum-HP tractor will lug on dense sections and PTO speed will fluctuate, causing potential miss-tie risk.<\/td>\n<\/tr>\n
Corn stover \u2014 shredder model required<\/td>\nPeak demand<\/strong> \u2014 sustained high load<\/td>\nShredder mechanism adds sustained HP demand beyond standard baling load. 9YF-2200S and 9YFS-2.2 require the full recommended HP range, not the minimum.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

<\/p>\n

Why Shredder Models Need So Much More HP<\/h2>\n

\"9YF-2200S<\/p>\n

The jump from 50HP (9YF-2200) to 99HP minimum (9YF-2200S) reflects a fundamental change in mechanism \u2014 not just a scale increase. The shredder models power two separate working mechanisms simultaneously: the primary baling mechanism (plunger, feeder, knotters) and the shredder rotor. The shredder rotor is a high-speed hammer-claw drum that operates continuously as the machine moves forward, processing incoming crop material before it reaches the feeder inlet.<\/p>\n

The shredder rotor consumes approximately 25\u201340HP on its own at full operating load in dense material such as first-cut alfalfa or corn stover. This HP demand is sustained and continuous \u2014 unlike the cyclical peak demands of the plunger \u2014 and creates a high baseline load on the tractor PTO throughout the session. A tractor at exactly 99HP PTO operates the 9YF-2200S at its limit; the recommended 115HP provides 16HP of reserve for dense sections and grade changes.<\/p>\n

The 9YFS-2.2 dual-shredder model adds a second shredder stage and a negative-pressure fan system, pushing the sustained HP demand higher still. The 125HP recommended figure for this model is not conservative \u2014 it reflects real-world operation in the dense bermudagrass and corn stover conditions the dual-shredder was designed for.<\/p>\n

\"9YFS-2.2<\/p>\n

<\/p>\n

Four Symptoms That Indicate Insufficient HP<\/h2>\n

These symptoms are the most reliable real-world indicators that your tractor does not have adequate PTO horsepower for the baler and conditions you are using. Each symptom has a direct mechanical cause rooted in insufficient PTO power delivery.<\/p>\n

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\n 1<\/span><\/p>\n
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Missed ties in heavier windrow sections but not in lighter sections<\/div>\n

The most diagnostic symptom. PTO speed below 500rpm shifts the cam follower timing window relative to the needle arrival \u2014 causing the bill hook to be slightly out of position when the twine is delivered. This pattern \u2014 miss-ties only when the windrow is dense \u2014 almost always indicates a PTO speed problem rather than a knotter adjustment problem. Reducing forward speed in heavy sections typically resolves the miss-ties, confirming the HP cause.<\/p>\n<\/p><\/div>\n<\/p><\/div>\n

\n 2<\/span><\/p>\n
\n
Engine RPM audibly drops when the plunger fires in the compression stroke<\/div>\n

A plunger compression stroke produces a brief but significant power peak \u2014 the engine must absorb this peak load without reducing speed. If the tractor engine RPM audibly dips each time the plunger compresses, the engine does not have sufficient reserve to manage the peak without PTO speed reduction. The engine note changes from steady to a rhythmic lug pattern timed with the baling cycle.<\/p>\n<\/p><\/div>\n<\/p><\/div>\n

\n 3<\/span><\/p>\n
\n
Required forward speed is too low for productive field coverage<\/div>\n

When the only way to maintain 540rpm PTO speed is to reduce forward speed below 4 km\/h in standard windrows (not dense windrows), the tractor is under-powered for that baler model in that crop. Baler productivity is directly proportional to forward speed in consistent windrows \u2014 a 3 km\/h operating speed produces roughly half the bales per hour of a 6 km\/h operating speed in the same field.<\/p>\n<\/p><\/div>\n<\/p><\/div>\n

\n 4<\/span><\/p>\n
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Abnormally high tractor fuel consumption per bale<\/div>\n

A tractor operating at 95\u2013100% of its power limit for sustained periods consumes fuel at maximum rate while producing lower bale output due to reduced forward speed. The result is a fuel cost per bale significantly higher than the rated-power pairing would produce. If fuel consumption seems high relative to bale output, verify PTO HP sufficiency before investigating fuel system issues.<\/p>\n<\/p><\/div>\n<\/p><\/div>\n<\/div>\n

<\/p>\n

How to Calculate Whether Your Tractor Has Enough HP<\/h2>\n
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1<\/span><\/p>\n
Find your tractor PTO HP from the specification sheet<\/strong> \u2014 not the brochure headline figure. The spec sheet will list a separate PTO HP entry (or “rear PTO power”). If only engine HP is available, multiply by 0.85 to estimate PTO HP conservatively.<\/div>\n<\/div>\n
2<\/span><\/p>\n
Identify your peak-demand crop.<\/strong> Use the HP demand table above. If you bale first-cut alfalfa at any point in the season, your peak demand is in the highest category \u2014 match to that, not to your lighter crops.<\/div>\n<\/div>\n
3<\/span><\/p>\n
Apply the terrain adjustment.<\/strong> For fields with any grade above 5%, add 15% to the HP requirement \u2014 gravity adds to the load on uphill passes and the tractor must maintain PTO speed while climbing with the weight of the machine and the bale in formation.<\/div>\n<\/div>\n
4<\/span><\/p>\n
Compare to the recommended HP for your target model.<\/strong> If your tractor PTO HP (after terrain adjustment) meets or exceeds the recommended figure, the pairing is well-matched. If it falls between minimum and recommended, the pairing is functional but will limit productivity in challenging conditions. If it is below the minimum, look at a smaller model or a more powerful tractor.<\/div>\n<\/div>\n<\/div>\n
\n Worked example:<\/strong> Your tractor has an engine rating of 72HP. Estimated PTO HP = 72 \u00d7 0.85 = 61HP. Your primary crop is grass hay with occasional sections of dense second-cut alfalfa. Terrain adjustment (gentle slopes, +10%) = 61 \u00f7 1.10 = 56HP effective sustained capacity. Comparing to the HP table: the 9YF-2200 has a recommended HP of 65HP. Your 61HP tractor is between minimum (50HP) and recommended (65HP) \u2014 functional for standard conditions, but may require forward speed reduction in the densest alfalfa windrow sections. The 9YF-1900 (recommended 60HP) would be a more comfortable match.\n<\/div>\n

<\/p>\n

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PTO Driveshaft HP Rating \u2014 The Overlooked Specification<\/h3>\n
\n
\n
\n \"agricultural
\n <\/a><\/p>\n

PTO shaft HP and torque ratings for all 9YF models: agricultural gearbox and PTO shaft HP ratings for square balers<\/a><\/p>\n<\/p><\/div>\n

\n

The PTO driveshaft has its own HP and torque rating \u2014 separate from the tractor and baler ratings. A driveshaft rated at 65HP transmitting 99HP will overheat the CV joints, cause premature bearing failure and potentially separate under load. Always verify that the driveshaft HP rating meets or exceeds the baler model requirement when upgrading to a higher-HP pairing. CV joint angle rating is a second specification that must be respected \u2014 operating at too steep an angle concentrates stress on the joint regardless of HP. Full specification guide: PTO driveshaft HP rating and CV joint sizing guide<\/a>.<\/p>\n<\/p><\/div>\n<\/p><\/div>\n<\/div>\n


\n\"square<\/p>\n

Frequently Asked Questions \u2014 Square Baler Horsepower<\/h2>\n
\n
\nCan I run a square baler with a 40HP tractor?+<\/span><\/summary>\n
Yes \u2014 with the 9YF-1700 specifically. This is the only 9YF model with a 40HP minimum PTO rating. A 40HP PTO tractor pairs with the 9YF-1700 for dry straw and light-to-moderate grass hay windrows. In dense windrows or first-cut alfalfa, a 40HP tractor will need to reduce forward speed significantly to maintain 540rpm PTO speed on the 9YF-1700. For any other 9YF model, 40HP is below the minimum and the pairing is not recommended. If your tractor is 40\u201345HP engine HP (approximately 34\u201338HP PTO), the 9YF-1700 remains the correct choice.<\/div>\n<\/details>\n
\nMy tractor is listed as 60HP. Is that enough for the 9YF-2200?+<\/span><\/summary>\n
A 60HP engine rating delivers approximately 51\u201354HP at the PTO \u2014 just above the 9YF-2200 minimum of 50HP PTO. This pairing will operate the 9YF-2200 in standard grass hay and dry straw without difficulty. In first-cut alfalfa or high-density windrows, you will need to reduce forward speed to prevent PTO speed from falling below 540rpm. The 9YF-2200 recommended HP is 65HP PTO (approximately 76HP engine), so a 60HP engine tractor is a workable but not ideal pairing for this model. For producers baling primarily light-to-medium windrows, the 60HP tractor will work reliably. For producers with significant high-density alfalfa, consider a 70\u201375HP engine tractor to stay in the recommended range.<\/div>\n<\/details>\n
\nDoes more HP than needed cause any problems?+<\/span><\/summary>\n
Excess tractor HP above the baler requirement causes no mechanical problems \u2014 the baler mechanism runs at its rated PTO speed regardless of the additional power available from the engine. The tractor simply operates at a lower percentage of its maximum load, which actually benefits engine longevity through reduced sustained high-load operation. The one practical consideration is the PTO shaft HP rating: ensure the driveshaft between the tractor and baler is rated for the HP being delivered, particularly if you are running a 115HP tractor on a 9YF-2200 that was previously used with a 65HP tractor. The driveshaft must be upgraded to a higher-HP-rated unit if you significantly increase the tractor power. The baler mechanism itself is unaffected \u2014 the shear bolt provides overload protection for the mechanism regardless of tractor HP.<\/div>\n<\/details>\n
\nWhy does my baler miss ties in the afternoon but not in the morning?+<\/span><\/summary>\n
This pattern almost always indicates a PTO horsepower issue linked to tractor engine temperature. Diesel engines produce maximum power at cool operating temperature; as the engine heats through a long working day, available power can reduce by 5\u201310% from the morning baseline on some tractor models. If your tractor is at or near the minimum HP for the baler, an afternoon temperature-related power reduction can push it below the threshold needed to maintain 540rpm under load. The fix is to run the pairing with more HP margin \u2014 a tractor at the recommended HP figure rather than the minimum. If the miss-tie pattern correlates with dense windrows in the afternoon, check that the morning session was not already operating near the HP limit by monitoring PTO speed (many modern tractors show PTO speed on the dashboard).<\/div>\n<\/details>\n
\nCan the 9YF-2200S be used with a 99HP tractor on all crops?+<\/span><\/summary>\n
A 99HP tractor at the 9YF-2200S minimum HP will operate the machine in light-to-moderate windrows at acceptable forward speed. In the crops the 9YF-2200S is primarily designed for \u2014 dense first-cut alfalfa, cotton stalk, corn stover \u2014 a 99HP tractor will be at or above its limit, requiring significant forward speed reductions in the most demanding sections. The 9YF-2200S was designed for use with the full recommended HP range (115HP PTO) to deliver its full productivity benefit in hard-stalk and high-density crops. If you are pairing with a 99\u2013105HP PTO tractor and primarily baling standard grass hay with occasional hard-stalk material, the pairing is workable. If corn stover or dense first-cut alfalfa is the primary use case, a 115\u2013125HP PTO tractor is the correct choice for the 9YF-2200S.<\/div>\n<\/details>\n
\nDoes bale density setting affect the HP requirement?+<\/span><\/summary>\n
Yes \u2014 higher density spring tension settings increase the peak HP demand per plunger stroke because the plunger must compress the bale against higher spring resistance. The effect is a larger amplitude of HP demand peaks during each compression stroke, which the engine must absorb without PTO speed reduction. In practice, the difference in HP demand between minimum and maximum density settings is approximately 8\u201315% at the same forward speed. This means that a tractor that is borderline at minimum density may begin to show PTO speed fluctuation when density is increased to maximum. For tractors already near the minimum HP pairing, it is advisable to operate at moderate density settings rather than maximum, unless the crop and market require maximum density.<\/div>\n<\/details>\n
\nWhat is the correct PTO speed for a 9YF square baler?+<\/span><\/summary>\n
The correct PTO speed for all 9YF series square balers is 540rpm \u2014 this is the rated output speed for the standard agricultural PTO connection used across all 9YF models. The 540rpm output must be maintained at the tractor PTO shaft throughout the baling session. Operating consistently below 510rpm causes knotter timing shifts and increased miss-tie risk. Operating at exactly 540rpm is the calibration basis for all knotter adjustments, density spring specifications and feeder timing settings. If your tractor has both 540rpm and 1,000rpm PTO settings, always use the 540rpm setting. Using the 1,000rpm PTO output with the standard driveshaft and baler gearbox designed for 540rpm input will cause catastrophic failure of the baler input gearbox in seconds.<\/div>\n<\/details>\n
\nHow do I check my actual PTO speed during baling?+<\/span><\/summary>\n
Most modern tractors display PTO speed on the instrument panel or cab display \u2014 check whether your tractor includes this feature before relying on the engine RPM gauge as a PTO speed proxy. Engine RPM and PTO speed are related by the tractor gear ratio but are not interchangeable figures. If your tractor does not display PTO speed directly: consult your tractor manual for the engine RPM that corresponds to 540rpm PTO output on your specific model, then use that engine RPM as your target during baling. An alternative method is a portable tachometer device that attaches to the PTO shaft end and displays actual shaft speed. These devices are widely available at farm supply stores and provide direct confirmation of PTO speed that is more accurate than calculating from engine RPM. Monitoring PTO speed directly \u2014 either via dashboard display or external tachometer \u2014 is strongly recommended for any tractor pairing at or near the minimum HP range for the baler model.<\/div>\n<\/details>\n<\/div>\n

<\/p>\n

\n

Ready to Match the Right Baler to Your Tractor?<\/p>\n

Tell us your tractor PTO HP, primary crop and annual bale target and we will confirm which 9YF square baler model<\/a> pairs with your machine \u2014 and whether your driveshaft rating matches the pairing.<\/p>\n

\n Match Your Tractor HP to the Right 9YF Square Baler<\/a>
\n View 9YF Square Baler Horsepower Specifications<\/a>\n <\/div>\n

\u30a2\u30e1\u30ea\u30ab\u30fb\u30a8\u30d0\u30fc\u30d1\u30ef\u30fc\u30fb\u30d5\u30a9\u30ec\u30fc\u30b8\u30fb\u30d9\u30fc\u30e9\u30fc\u30fb\u30a4\u30af\u30a4\u30c3\u30d7\u30e1\u30f3\u30c8\u793e \u00b7 1401 21st ST STE R, Sacramento, CA 95811<\/p>\n<\/div>\n

\u7de8\u96c6\u8005: Cxm<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"

Technical Reference \u00b7 9YF Series \u00b7 Updated August 2026 Square Baler Horsepower Requirements A small square baler requires between 40HP and 140HP at the PTO, depending on the model and crop type. The 9YF-1700 pairs with 40\u201355HP compact tractors; the shredder models (9YF-2200S and 9YFS-2.2) require a minimum of 99HP. Running a baler below its rated PTO horsepower causes PTO speed to fall under 540rpm \u2014 shifting knotter timing and producing missed ties. This guide gives you the exact HP figure for every 9YF model, explains the critical difference between engine HP and PTO HP, and shows how crop density affects your real HP requirement in the field. Covers: HP […]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[28],"tags":[],"class_list":["post-1278","post","type-post","status-publish","format-standard","hentry","category-forage-baler"],"_links":{"self":[{"href":"https:\/\/foragebaler.com\/ja\/wp-json\/wp\/v2\/posts\/1278","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/foragebaler.com\/ja\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/foragebaler.com\/ja\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/foragebaler.com\/ja\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/foragebaler.com\/ja\/wp-json\/wp\/v2\/comments?post=1278"}],"version-history":[{"count":0,"href":"https:\/\/foragebaler.com\/ja\/wp-json\/wp\/v2\/posts\/1278\/revisions"}],"wp:attachment":[{"href":"https:\/\/foragebaler.com\/ja\/wp-json\/wp\/v2\/media?parent=1278"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/foragebaler.com\/ja\/wp-json\/wp\/v2\/categories?post=1278"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/foragebaler.com\/ja\/wp-json\/wp\/v2\/tags?post=1278"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}