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Implement Alley Discussion Forum

Adjusting a JD brush hog cutter

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mmsb27

02-08-2006 11:03:21




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We have a 5 foot JD "brush hog" type cutter/mower (rounded back end that is closed). We pull it with a Ford 600, 3 point hitch. PTO speed is 540. It cuts low grass and brush ok, but taller hay bogs the mower down to the point it can stall the tractor. I've notice there is an adjustment for the rear follower wheel. I think there are 5 or six holes. It is set in the middle position. Does anyone know if adjusting this will allow the cut grass to escape, granting us more ability to cut taller grass? I know it was meant for cutting brush, but our IH Super C sickle bar bar mower is broken, and I can't find parts for it....Thanks
Mark

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hay

02-09-2006 02:45:19




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 Re: Adjusting a JD brush hog cutter in reply to mmsb27, 02-08-2006 11:03:21  
some BUSH HOG and JD rotary cutters were made with a closed rear shielding. something about safety so it would not throw a object out. kinda silly thinking because all the grass and any objects come out the front and thus right upon the operator of the tractor. i used one of those closed type for several years and took a lot of hits from sticks, rocks, and even heavy wadded grass. i think it is best to have a open rear cutter for operator safety. if you just have to have a closed type, at least adjust the tail wheel so the rear of the cutter has some space and lets the grass out without bogging down. safety can go too far as well as not enough.

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ebbsspeed

02-08-2006 14:06:12




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 Re: Adjusting a JD brush hog cutter in reply to mmsb27, 02-08-2006 11:03:21  
I always run the back end of my hog a little higher than the front. If the back end is lower that the front then you are actually cutting the same grass many times, just cutting another millimeter or two off with every swipe of the blades as you move forward. Set it the way I do, and the blades only contact the grass in the front of the mower. Once it is cut the blades don't touch it again.



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mmsb27

02-08-2006 14:23:34




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 Re: Adjusting a JD brush hog cutter in reply to ebbsspeed, 02-08-2006 14:06:12  
Thanks Ebbsspeed. I'll give it a little front down angle, and see if it helps. Thanks

v/r
Mark



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boo

02-08-2006 13:40:19




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 Re: Adjusting a JD brush hog cutter in reply to mmsb27, 02-08-2006 11:03:21  
I gotcha !! Maybe you'll figure something out. I 'll bet the tractor PTO being ground driven ain't helping the situation..good luck!



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souNdguy

02-09-2006 05:30:06




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 Re: Adjusting a JD brush hog cutter in reply to boo, 02-08-2006 13:40:19  
The common 4 and 5 spd trannies on the ford 600 were not ground driven. They were either tranny driven on the 640 and 650, and tranny driven and live on the 660...

He needs to angle the back of the cutter a bit higher than the front.. or he is cutting it twice. A 600 series in average condition will run a 6' mower.. so should really spin the blades on a 5' unit.

If he has the 5sp ( 650 ).. or preferably the live 5spd ( 660 ).. he should be able to run a tiller ok. The 4spd was just geared a bit too high.

Soundguy

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mmsb27

02-09-2006 05:42:35




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 Re: Adjusting a JD brush hog cutter in reply to souNdguy, 02-09-2006 05:30:06  
Thanks Soundguy. Our Ford 600 (640?) is a 1957, 4 speed with "Sherman" tranny. The Sherman has a lever on the left side of the tranny case, allowing a high, regular, and low range on each gear. We normally run in the medium range. With rhe clutch pushed in the PTO will engage when I disengaged the clutch. PTO will turn in reverse as well. I dont think it is a "live" PTO, or constant running PTO. I think I need to raise the rear of the mower deack, via the adjustment holes on the back side of the mower. Thanks for your help
v/r
Mark

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souNdguy

02-09-2006 06:06:38




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 Re: Adjusting a JD brush hog cutter in reply to mmsb27, 02-09-2006 05:42:35  
I'm not up on all the many variations of the sherman ( over/under/combo/reverser-shuttle/etc ) but wasn't aware of a ground spd unit for the 4spd tranny.

The pto should stop when you press the clutch on the 4spd. Also.. what you are calling 'medium'.. is 'straight thru'.

Post more info on this reverse pto deal. Any chance you have a reverser.. like a forklift might use..??

To be constant, it would have to be independent. To be live.. it would need to be independent, or 2 stage clutch like the *6* models, or have a live pto add on.. I htink dearborn made those as a hand clutch.. etc..

Soundguy

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boo

02-08-2006 11:32:03




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 Re: Adjusting a JD brush hog cutter in reply to mmsb27, 02-08-2006 11:03:21  
Is there anywhere on the cutter where the grass can escape? If the back end is closed up..see if somebody welded a plate on it. I think it should be opened. Unless the grass comes out the front...but then you're gonna get covered up when using it. As far as the rear wheel goes..that's just to set so the cutter will run the same distance from the ground as the front.(Another words ..the cutter should run pretty level front to back.)Any tractor is gonna bog down if the grass can't get out of the cutter.You'll be cutting the same grass over and over.

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mmsb27

02-08-2006 11:38:58




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 Re: Adjusting a JD brush hog cutter in reply to boo, 02-08-2006 11:32:03  
Thanks Boo. It as designed so the rear eand was curved, and solid for strength. The front is open, but the grass does get clogged up in the mower. The mower deck is level. If I raise the mower it will cut through the taller grass, but then the angle of the prop stresses the yokes on the spline. Cracked one already - so I know that is not a good solution. Makes me wonder if our machine will run a tiller attachment. PTO is not a "constant speed".... Thanks for the advice..
v/r
Mark

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