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JD50 lever under radiator? What is it?

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Guy

12-04-2001 05:00:42




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There is some sort of lever (with a pull rod attached to it) that is located directly under the radiator and behind the steering box on my 50. I was able to free it up relatively easily, but have no idea what it does. With the nose piece on, I can't see where a guy could even get access to it. I only noticed it when I removed the nose piece. Just wondered what it is and what it does? Thanks!




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Guy

12-04-2001 07:44:19




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 Re: JD50 lever under radiator? What is it? in reply to Guy, 12-04-2001 05:00:42  
Yes, this tractor is an early one....a '53 actually. Where should this shutter be for normall use? This tractor will not see winter temperatures very often a I am restoring it and will mainly run it in the summer. It seems to move pretty nicely. Probably hasn't been used for years. I was suprised that it worked at all. Just took a little cleaning of the couple inches of dirt that was over it (that probably protected it from rust) and a little WD40 and it was free and smooth. Should the shutter be out or in or in between, or? Thanks for any help!

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dave g

12-04-2001 11:50:26




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 Re: Re: JD50 lever under radiator? What is it? in reply to Guy, 12-04-2001 07:44:19  
Guy,

You could probably get away without doing anything. Just pull the shutters off, or leave them open all the way, and you'll have a nice cool running engine. I've got an AR that we use for just putting around the yard and light work, and the temp has NEVER got above 170 (that's where the guage starts, and it DOES work)



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Don Gillespie

12-05-2001 15:33:28




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 Re: Re: Re: JD50 lever under radiator? What is it? in reply to dave g, 12-04-2001 11:50:26  
Dave,
You need to change the email address that's listed in these posts. It's mine!

thanks



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PAT

12-05-2001 13:59:08




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 Re: Re: Re: JD50 lever under radiator? What is it? in reply to dave g, 12-04-2001 11:50:26  
Hey guys, I would want some sort of device to allow the engine to warm up. If the engine runs cold all of the time, it will lead to cyl.wall glazing, and eventually the rings will not seal well-(dropping compression). Hope this helps, LATER



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Pat

12-10-2001 17:06:17




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 Re: Re: Re: Re: JD50 lever under radiator? What is it? in reply to PAT, 12-05-2001 13:59:08  

I wanted to appologize for the wrong info I gave. I didn't catch it until today when I re-read it-seems my brain was working backwards the other day.

About the problem, I said it would cause glazing-which is wrong, glazing occurs when an engine is run too hot.

What will result in a cold running engine is excessive wear. This is due to the fact that when assembly clearances are given, they have factored in allowances for the engine parts to expand while running at operating temperature. If the engine never "warms up" the clearances for minimum wear will be met.

This may never be noticeable if the tractor is not run much, but as expensive as pistons and engine boring in my area is, I would'nt chance it. Clooney had a great idea of swapping in later 50 parts, This is what I plan to do to a 60 I am doing if I can not get the thermostat to work. Hope this Helps!

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Clooney

12-04-2001 08:00:51




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 Re: Re: JD50 lever under radiator? What is it? in reply to Guy, 12-04-2001 07:44:19  
Guy, the shutter should probably be wired completely open or just removed if it doesn't operate with the thermostat. I don't think that in-tank thermostat is still available from Deere but you could try. The other options are trying to find a used in-tank thermostat that works or make a control system so the shutters can be manually controlled from below the radiator or some other inconspicuous place. Most people just remove them rather than repair the system. If you could find the right donor tractor you could probably update to the later water flow limiting thermostat from a later 50.

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Clooney

12-04-2001 07:36:55




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 Re: JD50 lever under radiator? What is it? in reply to Guy, 12-04-2001 05:00:42  
Guy, it sounds like you have an early 50 that has a thermostat & shutters. The thermostat was mounted in the lower radiator tank & used a toggle type linkage & rod to control the shutters as the water temperature in the lower radiator tank heated up. It was supposed to be automatic with no control needed by the farmer so was covered up. That system worked so poorly due to dirt & corrosion it was replaced by a conventional thermostat in the coolant flow on the later 50's.

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Larry W.

12-04-2001 06:18:49




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 Re: JD50 lever under radiator? What is it? in reply to Guy, 12-04-2001 05:00:42  
Guy, I don't know much about 50's but could this be the lever and linkage that open and closed the shutters that were mounted in front of the radiator core? I don't know if the 50 had shutters, but the older lettered tractors did. It was a way of controlling engine temperature as there was no thermostat or water pump. I know 50 has a water pump, but maybe they did still have shutters which the farmer took off and threw away after the first winter as they were probably rusted stuck by spring.

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