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Tractor Talk Discussion Forum

What is the oldest hydrostat?

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Chris Jones

08-31-2003 19:27:39




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Just curious what tractors were the first offered with a hydrostatic transmission? How about the power shift transmissions?




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Anthony

09-13-2003 20:35:35




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 Re: What is the oldest hydrostat? in reply to Chris Jones, 08-31-2003 19:27:39  
i thought it was the minniapolis moline unisystem combine from the 50s, it was a little open cab 3 wheeler powered by a v-4 wisconsin.



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sebas

09-01-2003 12:05:56




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 Re: What is the oldest hydrostat? in reply to Chris Jones, 08-31-2003 19:27:39  
I know here in europe the first Fahr combine with hydrostatic drive came out arount 1965 or 1966. These machines had two oil rotors, one for each wheel and had no tranny. They need a lot of power to move. Now the hydrostatic drives come with 3 or 4 speed transmission and need less power to work.



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Don Wadge

08-31-2003 21:01:03




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 Re: What is the oldest hydrostat? in reply to Chris Jones, 08-31-2003 19:27:39  
I know this isn't the first tractor with hydrostatic drive and swathers are a little off your topic but this may be interesting to some. Versatile's first 100 self-propelled swathers in 1953 had hydrostastic drive. They then went to the dual variable belt drive due to some problems with the hydrostatic and the variable belt drive was cheaper to produce. I wouldn't doubt this was possibly the first use of hydrostatic drives on agricultural equipment. I have one of these drives. In 1973 Versatile produced the Model 300 "Hydro-Mech" 142HP 4wd (not the bi-directional). This tractor could be operated in any of three modes- hydrostatic, hydro-mechanical, or mechanical. This is possibly the first use of hydrostatics in large 4WD tractors. I happen to own the proto-type of this tractor built in about 1968 or 1969. If you want more info go to

versatile-tractors.com/M300HYDRO.htm

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Aces

08-31-2003 20:38:06




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 Re: What is the oldest hydrostat? in reply to Chris Jones, 08-31-2003 19:27:39  
Chris IH came out with 544 Hydro around 1965 Ford had the selectospeed in the 1950's



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bernhard

09-02-2003 21:38:14




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 Re: Re: What is the oldest hydrostat? in reply to Aces, 08-31-2003 20:38:06  
As I know, I was the Hanomag R 455 ATK.



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