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 11-12-2007, 07:35 Post: 148119
Hettric



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 John Deere Electronic vs Mechanical Controllers

Hi, I have a JD 755 and like everybody aspire to a larger tractor. In my case a 30 hp JD. I like to work on my own stuff so am Leary of upgrading to a computer controlled model. It frustrates me to no end that I am helpless to do much on my car and truck. please advise what was the latest pre computer model (4300?)I thought was the 4310 but I see ads listing E-hydro. Or is this a non issue, that is, are needed computer diagnosis or related problems rare.
Thanks






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 11-12-2007, 07:59 Post: 148125
hardwood

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Hetric; I have the JD Tech manual for my 4310, it explains most all the systems well enough that even I with my quite limited computer knowledge and an ohm meter would feel comfortable working on it. Frank.






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 11-12-2007, 08:45 Post: 148126
Hettric



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 John Deere Electronic vs Mechanical Controllers

Thanks Frank, I knew you had a 4310, hoped you would comment.Have you had or heard of any computer related problems? Just what does the computer control?
Thanks






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 11-12-2007, 09:10 Post: 148127
kwschumm



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 John Deere Electronic vs Mechanical Controllers

The computer mostly controls the transmission and safety interlocks. The most common problem seems to be with the wiring underneath getting caught on sticks and brush and getting damaged or, in the case of the eHydro, getting the potentiometers out of whack. If the wiring is protected by tucking it up tight that's half the battle. Or you can get a skid plate kit from JD if you don't use a mid-pto. That will protect it very well. The computer does have a semi sophisticated diagnostic system that flashes a light in patterns to point you to the problem. A tech manual, like Frank mentioned, is a very good idea if you do your own work. Not cheap but knowing how stuff works can set your mind at ease. Rarely some items would require special diagnostic equipment to fix, for others a meter would do fine.






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 11-12-2007, 09:12 Post: 148128
hardwood

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Hetric; I just gave the tech manual another look. I don't see a main computer anywhere in the wiring schematic. Far as I can see most everything is pretty simple to diagnose with a meter. I remember someone on the form having a problem with the E-Hydro switch under the pedal, but nothing other than that. Frank.






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 11-12-2007, 09:16 Post: 148129
hardwood

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 John Deere Electronic vs Mechanical Controllers

KWE; Perhaps the poteometers, cruse dontrol switches, etc. each have a small built in computer of some sort, but nowhere in the tech manual is the word computer used. Frank.






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 11-12-2007, 09:43 Post: 148130
Billy

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I think the technical name is Controller instead of computer.






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 11-12-2007, 12:38 Post: 148138
kwschumm



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In the electronic world the terms "processor" and "microcontroller" (or controller) are often used interchangeably, with the difference being a microcontroller has additional hardware to more easily interface to the outside world of inputs and outputs (relays, switches, etc). The term "computer" sort of encapsulates all of them. And then there's the ever popular "brain" Smile






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 11-13-2007, 00:34 Post: 148166
candoarms



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 John Deere Electronic vs Mechanical Controllers

If the M1 Garand doesn't need digital controls, neither does a tractor.

The day some idiot puts a chip in my combat rifle, I'll club him upside the head with it........for that's about all it would be good for anyway.


Joel






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 11-13-2007, 09:13 Post: 148177
kwschumm



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If a horse doesn't need hydraulics then why should a tractor Smile

There's nothing inherently wrong with electronics, it just takes a different way of looking at things. They are often easy to troubleshoot and fix with a little knowledge. Cost, well, that's another story but custom machining of obsolete parts isn't cheap either. In the case of the 10 series JD machines they can be retrofitted with the previous generation parts for the non-electronic approach if the electronics are no longer available. Myself, I'd like electronics a whole lot more if it wasn't for ROHs. Look for the lifespan of anything electronic, including life saving products, to be reduced by half or more in the coming years. Thanks a lot, EU.






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