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Tractor Talk Discussion Forum

Ugh...Stupid Electronics

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in-too-deep

10-25-2006 17:01:34




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I'm running a New Holland TJ 450 and it's really getting on my nerves. Was chisel plowing for about 5 hours last night, and decided to stop because nature called. Got back in to run again, and it won't come out of park. I can put it in gear and it will move, but the computer thinks it's in park, and puts the tractor in neutral a few hundred feet later. Put it in gear again, go a few more feet and so on. It wouldnt work this morning either, but sure enough, as soon as the mechanic came out, it worked fine. He says it's possibly a "park switch" and ordered one. I tried it again tonight and it did the same thing when I stopped. I tell ya, I'm longing for a 50 year old tractor right about now...doesn't have all that electrical mumbo-jumbo.

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davpal

10-25-2006 21:59:46




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 Re: Ugh...Stupid Electronics in reply to in-too-deep, 10-25-2006 17:01:34  
I feel your pain. I have a Lincoln Navigator that probably has more electronics on it than most new vehicles and also has a ton of problems that go along with it. It was actually voted consumer reports least reliable vehicle this year. I have it at the Lincoln dealer right now because the electronically controlled transmission likes to go into neutral when you are going down the highway at 65 mph. Nice huh? I never take anything to the dealer as the internet usually has all the fixes you can need on most forums but this time I did. The code reader was useless for this problem so far and the truck has been at the dealer now for a week. After changing a shift solonoid pack in the valve body it is now believed to be the ECM that controls all the powertrain that is faulty. They basically can not figure it out. I guess the thing that bothers me is not fixing the transmission but the overwhelming amount of electrical problems that this vehicle will have in the future as moisture takes its toll on everything and rust. I try my best to buy newer stuff to keep it updated but I am becoming more leary of too much electronic control on cars and tractors. I bet it looked impressive at the dealer though the first time you stepped in the cab and all the lights were blinking. I was impressed too but now my truck cant get me 20 miles to work and you cant chisel plow! Good luck, I hope it is an easy fix.

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430WLPG

10-25-2006 19:50:26




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 Re: Ugh...Stupid Electronics in reply to in-too-deep, 10-25-2006 17:01:34  
You mean the mechanic didn't hookup the laptop?And if the tractor has a performance monitor you can get to the error codes from it also. But it will have left some codes



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Brad in WI

10-26-2006 21:27:18




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 Re: Ugh...Stupid Electronics in reply to 430WLPG, 10-25-2006 19:50:26  
NO check engine light means no problem. I had a 1992 ford pickup that would never idle down Ford dealer put in 7 sensors with no change. I replaced a sticky throttle body and the truck ran fine. Mechanics don't know old school anymore. That is why I am going to fix my 1986 Chevy with the carb on her still.
Brad



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Bob

10-25-2006 18:43:10




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 Re: Ugh...Stupid Electronics in reply to in-too-deep, 10-25-2006 17:01:34  
I'm not familar with the NH's, but most of the modern stuff will spit out a trouble code, if you know what to "tickle". Do you know if your's has a diagnostic feature accessable by the customer?



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in-too-deep

10-26-2006 09:04:39




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 Re: Ugh...Stupid Electronics in reply to Bob, 10-25-2006 18:43:10  
Yes, it's got a diagnostic button, but I haven't messed with that. It's the boss's tractor so I don't want to get in over my head. When it would shift back to neutral after a few hundred feet, it would say "Trans Fault" I bet that couldv'e told me what was happening. That park switch sounds reasonable, though.



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430WLPG

10-26-2006 17:37:19




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 Re: Ugh...Stupid Electronics in reply to in-too-deep, 10-26-2006 09:04:39  
Had a similar problem on a STX440 (same tractor) and it was a bad connection at a connector where the wiring harness goes up the steering colum right under the edge of the dash



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buickanddeere

10-25-2006 17:35:26




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 Re: Ugh...Stupid Electronics in reply to in-too-deep, 10-25-2006 17:01:34  
I make my living maintaining that sort of stuff. Wit some practice and trouble shooting techiques, no problem. As for those techs who guess and throw parts at a problem instead of trouble shooting. They need a good swift kick in the family jewels.



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in-too-deep

10-26-2006 09:11:39




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 Re: Ugh...Stupid Electronics in reply to buickanddeere, 10-25-2006 17:35:26  
Yeah I hear ya. I wasn't there when the mechanic looked at it, so all I hear is second hand info from the boss.



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doogdoog

10-25-2006 17:19:09




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 Re: Ugh...Stupid Electronics in reply to in-too-deep, 10-25-2006 17:01:34  
Aloha, I would get the schematic and check all the possibilities. If it started right up for the mechanic, then it could be heat related because it seems that it happens only after you were working the machine and tried starting it up again. It may be like an automobile, with many safety features like, ignition key which releases the shifter from park and also by the brake (just and example).

Mahalo,
doogdoog

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in-too-deep

10-25-2006 17:26:32




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 Re: Ugh...Stupid Electronics in reply to doogdoog, 10-25-2006 17:19:09  
I wouldn't know where to start with schematics. I think it's a 2001 tractor and has more computers and sensors and switches than I could shake a stick at. All the controls in the cab are by-wire. I don't think it's heat related, although that did cross my mind. They're gonna try a new "park switch" and see if that helps. You're on the right track though, it's some kind of safety switch.



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