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JD850 overheats

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stan

05-13-2003 10:04:51




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I lost the last message so:I have a 1983 JD850 Diesel that is real sensative to over heating when the screen,which is so close to the radiator,gets clogged.This happens especially on windy days when mowing. Do I just keep stopping and cleaning the screen or is there some good fix?




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JDGnut

05-13-2003 12:07:27




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 Re: JD850 overheats in reply to stan, 05-13-2003 10:04:51  
I have put a few heads on the 850's because people ran them too long after overheating them... the cause was always a bad radiator... the rad.. might be clean out the outside.. but sometimes the tubes get so clogged on the inside it cannot cool the engine while working... Dont run it too long hot.... Good Luck
JDGnut



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Mike

05-13-2003 11:40:21




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 Re: JD850 overheats in reply to stan, 05-13-2003 10:04:51  
The purpose of that screen is to keep grass from clogging the radiator itself. If it is clogging quickly, check the grill assembly for cuts or open areas in it or around it that is letting the grass get in to the screen. Make sure all the foam is around the grille, and it is installed properly. There should be no open areas or gaps around the edges.Keep a close watch on the temperature, those engines can crack a head real quick from overheating

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F-I-T

05-13-2003 11:04:50




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 Re: JD850 overheats in reply to stan, 05-13-2003 10:04:51  
Stan:

I had heard that the little -50's were a bit sensitive to overheating. My neighbor has a 950, and he has been very pleased with it. Anyway, here are a few things you could try:

1) Make sure the thermostat is not sticking at a near closed position. Also check condition of hoses.

2) Flush and re-fill the coiling system so you're getting maximum efficiency

3) You might consider adding some of the compounds that increase the "efficiency" of the coolant. I have seen a product called "Water-Wetter" used to help a marginal cooling system by allowing the coolant to shed it's heat faster.

4) Make sure the radiator fins are straight and the core is free of grease and dirt. Many tractors that had overheating problems have been solved by a blast from the power washer ! Just be careful around those delicate radiator parts.

5) Make sure the fan belt is good and tight. That small waterpump has to be working well to push that coolant through that small radiator.

Good Luck with it !

Frank-in-Tallahassee
70D // 855

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