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Farmall & IHC Tractors Discussion Forum
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hydro

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sam in mo

01-24-2007 05:55:55




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Can someone please tell me what a hydro is? I think it is like a auto trans but not sure. If it is does it take much hp away from the tractor"s drawbar? thanks Sam




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sam in mo

01-24-2007 15:09:32




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 Re: hydro in reply to sam in mo, 01-24-2007 05:55:55  
Thanks to all who posted. Sam



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Russ in CO

01-24-2007 07:54:29




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 Re: hydro in reply to sam in mo, 01-24-2007 05:55:55  
I have a Hydro 84 with a snow blower on the 3 point. The variable speed is very handy when blowing the heavy snows we've had this year. I can creep into the deep snow and speed up for the lighter stuff.



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Hugh MacKay

01-24-2007 07:29:01




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 Re: hydro in reply to sam in mo, 01-24-2007 05:55:55  
Sam: Hydrostatic transmission is nothing more than a hydraulic pump and hydraulic motor with a variable delivery valve. They loose considerable hp from engine to rear wheels. Contrary to what most folks would have you believe it was actually developed for use on vegetable harvesters. Very high value operations where infinate variable speeds were required. They work fine on loaders as well but I doubt if one could justify a new one for baling hay. You start doing the repairs on an old one, it would have to be one heck of a valuable hay crop.

I have friends that bought these hydros new for potato harvesting, planting and spraying. Other than that they leave them parked, just too much repair and maintinence for low value crops like hay. Most of these guys are on a rotation of potatoes, hay and grain, and it's their tillage tractors that do the hay.

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Allan In NE

01-24-2007 08:14:20




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 Re: hydro in reply to Hugh MacKay, 01-24-2007 07:29:01  
Yeah, What Hugh said.

They are absolutely the cat's meow for certain types of work, but a total disaster for any real "tractor tasks".

Have your billfold at the ready. :>)

Allan



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Hugh MacKay

01-24-2007 10:20:22




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 Re: hydro in reply to Allan In NE, 01-24-2007 08:14:20  
Allan: What makes the hydros valuable on a potato harvester is the ability to crowd he harvester so one is just nicely rid of the soil as potatoes reach the truck or wagon. My friend estimated the hydro cut down his losses from bruising about 15%. Potatoes bouncing over those chains without soil cost a lot of dollars with older gear drive tractors in the past. He had a gear drive 856, gear drive 1066 and a 1066 hydro. After some years he built a self propelled harvester and mounted the 1066 hydro up top as the power source. He put sprokets on the rear axle with chain drive down to harvester wheels. His pull type had been two row, the self propelled was four row. That was 30+ years ago, today they are buying factory self propelled harvesters.

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Steven@AZ

01-24-2007 06:25:36




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 Re: hydro in reply to sam in mo, 01-24-2007 05:55:55  
As far as a Farmall/International is concerned, a hydro is a fully hydraulic transmission with infinitely variable speed from barely crawling up to about 20 miles per hour.

They have a high range and a low range, most work will be done in low range as it is good for around 6 to 8 miles per hour if I remember correctly. Very light work such as raking could be done in high range, but generally speaking most people only use high for road transport.

The hydro system takes a pretty good chunk of horsepower to operate and hydro tractors do not work well for heavy drawbar pulling. They are best suited for haying operations and loader work, in my opinion.

If you get a gasser they are really tough on fuel, the diesels aren't as bad, but still worse than a comparable gear drive.

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Roger Mills

01-24-2007 06:19:30




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 Re: hydro in reply to sam in mo, 01-24-2007 05:55:55  
Can be a high speed boat, hydrofoil or hydroplane; can be an automotive transmission, hydromatic; can be a drive system, hydrostatic; can be short for hydraulic; can mean water or other pressure, hydrostatic.



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MikeinKy

01-24-2007 06:23:35




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 Re: hydro in reply to Roger Mills, 01-24-2007 06:19:30  
When hydro is used in this context, it means a hydroststic transmission. Which has a lever that changes the ground speed infinitly as you move the lever forward or back. like a lawnmower. It does, I think cost some horse power. It is also convienient for a lot of jobs.



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