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Ford 9N, 2N & 8N Discussion Forum
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how much pto power for brush cutting

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PeterC

02-19-2005 20:41:06




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I"ve been shopping for a big brother for my 8N. I need to deal
with neglected pasture with lots of 1" diameter trees and shrubs. Some of this stuff is pretty dense. I have been told that a Deere with a 990 has enough power for a 6 foot Deere mower which will cut up to 2" diameter and cut it at ground
level. I have also been told at other places that I need more than 4o pto hp and either a Woods or Bushhog mower, and that I can cut up to 6" stuff with a Woods mower rated for 1", and that I can run a Bushhog which says you need 40 pto hp with a Kubota which has 37.5 pto hp, and that Woods are better-built than Bush Hog, and that I can't expect to cut closer than 1 1/2 or 2 ", and that at least I won't have to have brush piles all over the place because stuff will get chewed up so completeley and etc. - How about some replys from people with real experience? The idea of cutting stuff down to ground level
so there are no protruding stubs sounds too good to be true.

My other concern is center of gravity for cutting on side hills, and my 8N looks awfully good compared to what is out there now: the compacts don"t seem to have as much tread width adjustment, and the utility tractors generally seem too high off the ground. Any ideas?

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Dean

02-20-2005 05:59:51




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 Re: how much pto power for brush cutting in reply to PeterC, 02-19-2005 20:41:06  
Most bush hogs will cut saplings up to around 2" dia. or so but, like Soundguy said, they will not remove the stumps nor cut them at ground level. Some of the heavier made machines with larger tractors can cut somewhat larger saplings but I have never seen or heard of any agricultural type set up that can cut anything near 6" dia. As to the 2" limit, it depends upon what is growing. I would not hesitate to drive over a 2" willow, buckeye or box elder but will get the chainsaw out for a 1" osage orange (hedge).

Also, as Soundguy said, when going over the ground the first time, make sure that the blades are not sharp as dull blades are less likely to cut the saplings cleanly leaving sharp spears that can puncture your tires on the next round or cutting.

As to HP: HP is kind of like money and women: Some's good and more's better. I have cleared a lot of ground with a heavy 5 foot cutter and a 51 8N but the N has a combo Sherman which reduces both ground speed and PTO speed, multiplying torque in the process. I also use a 55 860 with 6 foot cutter. I can cut heavier brush with the 8N 5 footer in low underdrive than I can with the 860 6 footer even though the 860 has a very low first gear. Both cutters have slip clutches, which I highly recommend over shear bolts for ground clearing providing that they are properly adjusted for your tractor and not rust frozen. Even with the slip clutches I would never attempt to cut any hedge over about 3/4 inch.

Finally, as to stability, the early Fords are hard to beat due to their low center of gravity. I have seen some later model LCG tractors that would probably be better but they would also cost considereably more. The best set up that I have seen is a Friends 1979 JG 2440 Orchard. This 50 HP machine makes my 8N look like a high-crop. I have my eye on it and hope to talk him out of it someday as much of my ground is steep. He bought it new and it has less than 1000 hours on it.

Dean

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MarkB 2N MS

02-19-2005 23:47:03




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 Re: how much pto power for brush cutting in reply to PeterC, 02-19-2005 20:41:06  
If you"re looking for recommendations for a JD with 45 to 55hp my choice was John Deere"s 5105.

It has 8 gears forward, 4 reverse and shuttle shifting between low range forward and reverse. The 6" stance is stable and if you opt for the MFWD model, it"s even more stable. I enjoy mine and they are available used at reasonable prices.

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souNdguy

02-19-2005 21:14:37




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 Re: how much pto power for brush cutting in reply to PeterC, 02-19-2005 20:41:06  
When you say cut 6" I hope you mean.. 6" tall.

Most mowers on the market will cut 1" and 2" stuff. 2" green .. 2" woody gets iffy depending on the mower and machine.

A 9/2/8 N will handle a 5' hog.. a Naa or hundred series will handle a 6' hog

The JD mowers are good and heavy duty.. just like the ford 95x series... i would put them in line with other first rate equipment like bushhog brand and woods. There are economy lines like kodiak, howse, and king cutter that end up doing pretty well, at about half to 3/4 the cost.. and less weight tan the other units. that less weight means they are only medium or light duty.. but they are also easier to tote on an older machine. I have used a 5' king kutter for a number of years now. Iv'e cut 2" woody material with it.. but don't make a practice of it. 1.5" woody is fine.. and green stuff is fine.

I can adjust the mower to cut about 1.5" to 2" from the ground.

Don't expect a brush mower to de-stump for you.. 1" woody stumps make sharp spears that can find tires.. though most cutters end up splintering wood, not cutting it clean.. that's why you don't want a razor sharp blade.. pluss rocks eat em up worse the sharper they are. A 3/32 flat on a blade cuts just fine.

N's do tend to stick to slopes better than others.. however any slope that is questionable should always be traversed up and down.. not sideways.

Also.. gearbox hp is the max hp you can feed it safely. A 40hp gearbox doesn't need 40hp to run it.. etc. For instance.. my 26 hp N runs the 40hp gearbox on my 5' cutter just fine.

Soundguy

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HOOKER

02-19-2005 20:52:58




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 Re: how much pto power for brush cutting in reply to PeterC, 02-19-2005 20:41:06  
in my opinion// it might cut 6" material once but i sure cant see it cutting that much very long// but if you do that please tell the future buyer of that piece of equipment that you used it for that. i know guys that have done nearly the same thing cut a bunch of big stuff and sold it and the next guy(me) had to sink a lot of money in it to get it going right again. if i would have known that before i made the deal on the internet i never would have bought it.
BUYER BEWARE ON ALL USED EQUIPMENT!!!!!

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