Mr.AKFISH your info was great. 5075M pto HP is rated at 57 HP. Other tests rated the 75m at 65 to68 pto HP. So I'm very surprised to hear that your 16f 16 r had to run in a1 or a2 gears . Not doubting your word sir but I'm thinking.. my jd970 28 pto HP with a 60" rhino 260 rotary shredder cuts brush oak 1/2" to 1" in 4 th gear (3.1 mph) heavy brush 1"to 2" in 2/3 gear (1.6/1.3 mph) and 1" to 3" in 1st gear (.9mph) using only half the width of the shredder. I had real high hopes that a tractor with 60 to 68 pto HP with a good mulcher could handle 1"to 3" heavy brush in a higher gear 3.1 mph and maybe even 4 mph. Any thicker brush I realize I'd have to take in much slower gears. But I guess I'm just showing my inexperience "rookie!" Lol.
As for low profile tractors, I took a trip with my brother a few weeks back. In Brownfield TX I found a GN 5090 JD. Specialty tractor for grapevine farming. Ideal for me !, very low profile, 90 pto HP ! Price tag $70k. Ouch.
Thank you Gentlemen again . Very grateful for your time and help. Still hunting
I also owned a JD970. Great little tractor! Mine had a 8A backhoe as well.
The newer model 5075E and 75M use the 3-cylinder, 2.9liter engine and JD lists them @ 57hp pto. Nebraska Test has that engine @ just over 63hp.
My 75M has the 5-cylinder, 3.0liter engine @ 60hp pto. Nebraska Test has that engine @ just over 65hp. Very similar. The 5-cyl has a little better torque rise and higher power bulge, though.
I think the difference in our discussion is how you're looking at using the mulcher versus how I used the MeriCrusher. When I turned that mulcher loose on a thick stand of small trees and brush, the ground was black and smooth and you could plant grass when I was finished.
It looked like it had been roto-tilled. The chips and leftover slash, etc. were ground up and well mixed into the dirt.
My neighbor has a Bobcat T320 or T330 (forget exactly) but it was the biggest rubber tracked Bobcat made at the time, and he mounted a Fecon mulcher head on it. He uses it to both clear brush and trees (big trees - 24" dia.) but also to deep mulch the brush and leave a plantable, dirt surface with most of the chips, etc. incorporated into the dirt. If you do that... you're gonna have to go slow.
So, the distinction is... Are you just gonna mow and clear or are you planning to leave a mulched seedbed?
If your objective is just to clear the brush and leave the roots and rootwads in place, then you could use a brush-hog mower and knock that stuff down. And yes, I can work my 8' brush-hog, MX-8 in 4th and 5th gear if that is the job.
Mulching with the MeriCrusher is a different exercise. The objective is to make the land ready to re-seed with either a hay crop or pasture. So, that carbide tooth drum is grinding through the stumps and roots as well as the tops and churning through the dirt up to 10" deep. Takes alot of horsepower and it's a sloooow grind!
I paid around $62K ($3K shipping) for my 75M in 2011. $70K for that 5090 doesn't sound all that bad... Really depends on hours, condition, earlier use, etc.
I really recommend a creeper transmission if you are considering the option of seedbed prep work. It will save you money, in the end.
Best of luck.