Go BottomHow much PTO HP do I need for a 5 cutter
 | bigbouey
Join Date: Dec 2005 Posts: 6 Atmore, Alabama 
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2005-12-13 120971
Thanks in advance for any help. I am retiring my old 601 Workmaster and going to purchase a new tractor. I want to get a John Deere 3120 with a eHydro transmission. This tractor has a 22HP PTO rating. Will this be enough to handle my 5' Woods cutter?
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 | Peters
Join Date: Feb 2002 Posts: 3034 Northern AL 
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2005-12-13 120978
Good question: I was working on this problem on the post concerning PTO and HST. My 955 will move a 6 ft HD in regular grass, but it is 32 HP and 27 PTO, but I would not want to do it all the time or in the woods. Therefore I was looking for something a little stouter.
Like the BushHog the Woods mowers increase HP requirement with heavier mowers. The 5' light is 25HP and the 5ft medium is 30 HP requirements. I assume that is gross HP not PTO. You need a good 25 PTO for the medium duty cutter. Deere recommends only the light unit.
This is what started the other post. The older hydrostat drives you lost about 5 HP on the PTO. The newer designs are more like 8 HP. This means you can not run a 5' medium duty rotory mower on the 30 HP tractors (according to specs). With the pounding a mower takes I would not go to a light 5 ft unit unless you have no brush only grass. ....
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 | dsg
Join Date: Jun 1999 Posts: 528 Franklin, Maine 
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2005-12-13 121003
Not sure where I learned this but it sticks in my mind as 4.5 pto hp per each foot of bush hog, I think thats minimum pto hp. So use this info. for what its worth:)
David ....
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 | kwschumm
Join Date: Feb 2003 Posts: 5764 NW Oregon
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2005-12-13 121006
I pull a medium duty JD MX5 5' cutter with 25 pto hp and it does fine. I'd think 22 hp with a light duty cutter would work, but you may need to slow down a bit in the heavy stuff. ....
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| DK35vince
Join Date: Feb 2002 Posts: 689 Western,Pa.
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2005-12-13 121010
You should be OK with a 5' mower.
I ran a 5' brush mower on my JD 850 ( 22 PTO HP).
It ran it fine most of the time. I would have to go slow in higher,really thick/heavy grass.
....
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