Who makes the higher HP HST utility tractor?

[daugen]

It's probably because of the weight of the tractors can't handle the hp available.

Agreed that weight and traction are issues and limit horsepower being put to good use; why not put a hydrostat in a 5 series JD or an M Kubota?
I agree that a two ton tractor isn't likely to be able to handle much more than 60 or 70 hp.
something tells me this is more transmission limited than horsepower
And yes, as hp increases, more likely one is seeing commercial/true ag/row crop use of a tractor and there fuel efficiency is much more important.
Those of you with larger tractors with shuttle shifters ,how do these compare in ease of use to a hydrostat?
Can anyone compare hydro, IVT and shuttle as trans options for us non commercial farmers?

 

[jeff9366]

The issue is more loader Versus no-loader tractors. HST on a non-loader tractor is rare. Why spend the money?

All ag operations want one medium size tractor in the herd with a loader. Loader tractors forward/reverse/load most efficiently in terms of operator's time with HST. Factors are max torque when shoving loader into material and fast, sure direction change with HST pedal(s).

If JD saw DEMAND for an HST in a 5 series tractor, JD would offer it.

When pulling down 1/4 mile or longer rows, the advantages of HST are nil, and increased fuel consumption of engine/HST combination becomes a significant factor over lower fuel consumption of a geared tractor of same horsepower.

Over-the-road speed of HST Vs Gear may also be a factor.

HST transmissions are made in very large sizes. Large HSTs are used on gigantic mining cranes and ocean container transport ships, among other applications. Go to Wikipedia.

I have been around tractors awhile. I HAVE NO IDEA WHAT IVT IS.

 

[Turbys_1700]

Daugen, I have no direct experience with hydro for extended periods of time but have run them. My last two tractors were mechanical shuttle shifts. They are great for loader work but extended use of my left leg to depress the clutch can get tiresome. I've run some Power Shift units in Ag settings. Just shift the tractor and go once a range is selected. Again fine for Ag operations but not useful for loader work. Hydro IMHO is the way to go when FEL work is your major function or mowing around obstacles that requires change of direction or variations in speed. I know the arguments about separate versus treadle hydro pedals. I would suspect that the fatigue for hydro is somewhat similar to shuttle operations the difference being the stress is placed on the right ankle and lower portion of the foot for hydro versus left leg for shuttle. Ergonomics and operator platform layout along with individual physical size would play an important role in it also.

 

[TripleR]

Our two main tractors are an L5740HSTC and M8549HDC, we find ease of use pretty close in most applications though if operated for a long day, you'll be a bit more fatigued if you are an occasional user. If used daily, it's going to be close to a wash as long as you manage to avoid getting old.

 

[jenkinsph]

We have discussed this before and I would be interested in larger hydrostatic tractors for my work. Some of the work I do which is very close to obstructions and new dump trucks would make this a good choice. Hydrostatic transmissions are very handy for box blade work and larger sizes for bigger jobs would be desirable for my work.

 

[ArlyA]

I grew up in central SD and from the AG business, about 1/2 family is in it today. I was telling my bro-in-law that we were looking at a compact tractor and a JD. His family has a long term love affair with JD's so when I asked him about compacts, I quickly learned he'd never operated one and knew next to nothing about them. He had just recently purchased one for my sister who's seriously into gardening. (a master gardener) It wasn't a deere, but he liked it just the same. We'll get a HST tranny.

 

[daugen]

I HAVE NO IDEA WHAT IVT IS.
infinitely variable transmission
unlimited gears
but I had the acronym wrong:
CVT, continuously variable trans
AGCO's Continuously Variable Transmission (CVT) Explained - YouTube

Fendt calls it Vario
Deere calls it?

 

[holeycow]

Our two main tractors are an L5740HSTC and M8549HDC, we find ease of use pretty close in most applications though if operated for a long day, you'll be a bit more fatigued if you are an occasional user. If used daily, it's going to be close to a wash as long as you manage to avoid getting old.

The facts. Simply and well stated.

 

[pmsmechanic]

I HAVE NO IDEA WHAT IVT IS.
infinitely variable transmission

Deere calls it?

Deere calls it IVT.

I don't know how the other makes do it but Deere's is 80% mechanical and 20% hydraulic. 80% of the power transmission is mechanical. Like as in actual gears transmitting the power and the rest (20%) is done through a hydraulic motor spinning a planetary gear set at variable speeds. Once the hydraulic motor reaches it's rpm limit either up or down the computer shifts the transmission into the next mechanical gear with the hydraulic portion making up the difference in speeds. It's all done so seamlessly that you never feel the actual mechanical gear shifts.

Transport gears are arraigned so that top speed going down the road is done at less than full throttle to save fuel. Again the computer manages the engine speed and the transmission ratios while accelerating to top speed. The engine slows down and the tractor goes faster.

 

[Sawyer Rob]

I still think the best IVT comes from the folks that put it in a tractor first and got it right, first try, Fendt/AGCO.

As for going down the road, when you road travel with a AGCO IVT, the IVT swings out of the way, and you go into direct gear drive......very efficient.

SR