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Farmall & IHC Tractors Discussion Forum

thermostat assembly

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03-21-2007 16:20:59

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Hi folks,
My tractor is a German built model with a 3 cylinder (1.8 liter)diesel. The thermostat is connected in the upper radiator hose (about 1 1/4 inch)with a smaller bypass connector that goes to the lower radiator hose. The whole assembly is about the size of a pony beer can. The link below has a picture of the tractor (unfortunately not mine) if it helps to compare.
I need a thermostat, and was told today by the dealer that they are no longer available. I'm wondering if the american models have anything that compares. Or, can I just do away with the thermostat without ruining the engine?
Any advise is appreciated.



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03-22-2007 06:34:40

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 Re: thermostat assembly in reply to dave2, 03-21-2007 16:20:59  
A way to go is to strip the guts out of the existing unit, and put a new tstat that contains a bleed hole in it to allow some very restricted flow in the hose between the upper outlet, and the housing for the old one. I think a 1/4" (6mm) hole would be fine. Choose a replacement which has an OD just a bit bigger than the hose, and modestly tighten a hose clamp on it when it is in place. JimN

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MN Scott

03-21-2007 20:26:03

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 Re: thermostat assembly in reply to dave2, 03-21-2007 16:20:59  
I ran into the same problem with my early 756 with the 310 geman diesel. The only option is to get a new style water pump carrier from a newwer german diesel tractor. Its the cast peice that the water pump bolts to. It uses an avaiable thermostat from CNH under the top water outlet were the top radiater hose connects instead of the "tin can". CNH has this carrier but they get $1000 for it so try to find a used one. One from a 3, 4, or 6 cylinder will work. You will also need the cast water outlet and a top radiater hose from a newer model plus 2 gaskets and the hose that connects the carrier to the water manifold. You do not want to run and engine without a thermostat as it will run cold causing increased fuel usage and rapid engine wear.

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03-21-2007 17:36:57

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 Re: thermostat assembly in reply to dave2, 03-21-2007 16:20:59  
I wouldn't have thought it would be good for your engine to run without a thermostat although it's not likely to do a diesel as much harm as it would a gas engine. Have you tried going to somewhere like NAPA and see if they can find you a 'will fit' thermostat? tractorsam

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03-21-2007 18:29:16

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 Re: thermostat assembly in reply to tractorsam, 03-21-2007 17:36:57  
Thanks, I'm sure that there is something around somewhere, just know that whoever has one will be real proud of it. There's not alot of make do kind of folks here as far as parts stores. You have a mercedes or BMW, you buy your parts for the mercedes or BMW. I'm sure something will turn up though.


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karl f

03-21-2007 19:41:16

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 Re: thermostat assembly in reply to dave2, 03-21-2007 18:29:16  
depending on your climate, or the temperature when you operate the tractor, a thermostat might be unnecessary. however, you still should have a restrictor washer to provide proper coolant flow. the purpose is to keep the coolant in place long enough to absorb the heat from the block (although this point is debated alot). a cheap way to make a restrictor washer is to remove the interior valve portion of your thermostat and reinstall the outer ring.

are you in Deutschland? sounds like your parts supply system is different than what we in the US and Canada are accustomed to! maybe we can come up with a solution for you that might be locally obtainable or someone might be willing to ship to you. i work in an auto parts store and could see what might work for you. feel free to email me if you need help!
-karl f

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03-21-2007 18:59:25

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 Re: thermostat assembly in reply to dave2, 03-21-2007 18:29:16  
Just this afternoon I was at a local auto parts store, looking at a STANT thermostat catalog for an 8N Ford thermostat, and noticed a "canned" thermostat like you mention.

I didn't notice the application, nor do I have any idea of hose size, but I'll take another look tomorrow.

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03-21-2007 22:01:07

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 Re: thermostat assembly in reply to Bob, 03-21-2007 18:59:25  
Thanks. I guess before I panic, I'll take it off and tour a few parts stores. There has to be something that will work. I guess the trick will be the bypass hose.

Thanks, Dave

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karl f

03-22-2007 16:11:23

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 Re: thermostat assembly in reply to dave2, 03-21-2007 22:01:07  
don"t worry about the bypass. find a t-stat first, the bypass can be added as an afterthought. one company we carry at work makes a nipple you can attatch to a radiator hose to get a bypass, heater, or whatever you need for a hose. you cut a hole in the hose, and this nipple threads into a nut and washer assembly placed into the hose. it is supposed to seal perfectly, but i would reccomend a new hose to work properly.
karl f

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