Comparison Which manufacturer has the highest HP true HST tractor?

[Fallon]

AS LouNY said, you will have a hard time to find agricultural tractors 60+ HP with HST it is not robust enough for that, but you'll find KVT in the case of Kubota or CVT in other makes or PS (power shift)

800+ hp dozers run HSTs. It's not that they aren't strong enough. It's that bigger than CUTs efficiency matters a bit more than convenience. Bigger machines tend to be ag machines rather than utility machines.

 

[LouNY]

800+ hp dozers run HSTs. It's not that they aren't strong enough. It's that bigger than CUTs efficiency matters a bit more than convenience. Bigger machines tend to be ag machines rather than utility machines.

I was under the impression that most of them where 3 or 4 speed automatics or power shift transmissions.
Which ones are hydrostatics?

 

[Industrial Toys]

Many large Ag tractors are Infinitely Variable. Probably not oil driven. Too much heat and hp loss. Not to mention noise!

 

[ruffdog]

Good article:

https://www.equipmentworld.com/the-pressures-on-hydrostatic-transmissions/

 

[Fallon]

Good article:

https://www.equipmentworld.com/the-pressures-on-hydrostatic-transmissions/

Ya, good article. It's from 2007, so not exactly a recent development either (regarding lots of HSTs in big machines). The downside to HST has always been cost/complexity & efficiency.

Sometimes it's worth it (big time for CUTs) when precise control & manuverability is paramount. Sometimes not (big ag tractors) where they just pull a huge plow or impliment in circles all day at the same speed.

I think the current crop of CVTs is closing in on the efficiency of geared machines while still giving the control of a HST. I havent seen any in the CUT market yet, but I believe there are a handful in the UT range. Not sure what the price premium is, but I bet it's a bit as essentially you have a small HST ontop of a geared transmission that's more complex than a clunker 3 speed on every HST (at least in the CUT range).

 

[Agvg]

Many large Ag tractors are Infinitely Variable. Probably not oil driven. Too much heat and hp loss. Not to mention noise!

The noise must come from bad design, larger equipment with hydrostatic drive dosent whine like microtractors, know only one Kubota BX and the noise is very unpleasant.

 

[Bavarian]

Fendt 207 Vario has the best transmission there is, stepless from 0.02 to 40km/h but not particularly cheap to buy.

..And all the way up to the 1050 Vario with 500hp.

 

[Agvg]

Yes, Fendt is very popular here I live.

 

[Trillium Farm]

..And all the way up to the 1050 Vario with 500hp.

Also MF has the very same transmission.

 

[searcyfarms]

you wont find one in the 60hp range as far as pto HP is concerned