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This question comes up a lot. NH 271 or older, & JD 14 & 24 balers all take about 15 hp to run the baler itself. HOWEVER.... Also it takes 5-7 hp to pull the tractor & baler through the field. Takes another 5-7 hp to pull a wagon, or deal with hills. Now, the HOWEVER part. A blaer _uses_ 50 hp to push the plunger back & form the bale. That big flywheel stores 50 hp. It can back-feed through the pto shaft to your tractor. Your tractor needs to be able to handle that kind of stress. Most new little diesels are _not_ so designed to handle the stress pulse of powering that big flywheel on an irregular power push. As well, a baler full of hay is pretty heavy. You get out in the field with a light tractor, & you will have the tail wagging the dog. Tongue weight is often negative as the bales drop off. The plunger is pushing forward & back, bouncing the tractor. Turn a corner & the baler will want to push the tractor, just too light. It is more than just raw hp needed. It is very, very hard to bale with less than 25 hp. It is very hard to find a newer tractor of less than 35 hp built tough enough to handle a baler, both in the pto drive components and physically able to manuver the baler in the field - they are too light weight. --->Paul
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