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Minneapolis Moline Tractors Discussion Forum
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M5 radiator spewage

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Jerry E.

09-28-2004 19:46:27




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We have an aggravating ole M5 gas moline. Bought it stuck, and rebuilt the engine and whatnot. Aside from the numerous trickles of oil, the typical amplitorque woes, (that we"ll fix as soon as the clutch gives up the ghost) and the weak hydraulics, the radiator spews when the tractor is brought up to operating speed. It spews out the overflow. I put a collection jug on it, that didn"t help. I"ve tried 17 lb caps to 7 lb caps with no luck, I even ran it loose, but it still spews. The tractor is a gas, but we put propane heads on it. Would that cause the problem? It runs extremely cool, (as i don"t think it has a thermostat...something I need to fix)but after after it spews for an hour or two it tries to get hot due to the lack of fluids. This tractor is used for farming. Tractor pullers are easy on their machines compared to what I put the ole minnies through as this is how I get my jollies. I hope someone can help me end the spewage soon, and spend less time pouring water in, and more time makin" the ole gurl paw for sod.

Thanks in advance

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Curt Cooke

09-30-2004 06:54:45




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 Re: M5 radiator spewage in reply to Jerry E., 09-28-2004 19:46:27  
I had a similar problem with my M5 diesel. I could find no other evidence of a cracked head (plus I didn't want to have to admit it to myself). The problem was solved by installing a PROPER thermostat which slowed the coolant down. See, I had no problem with water but the minute I put antifreeze in, it was suds city. I strongly suggest you install a PROPER thermostat AND drill a couple of small (1/8") holes in it to be certain you have some by-pass. Without some by-pass, the thermostat doesn't get to sense the water temp until it's so hot that spewage will again occur.

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SWMolines

09-29-2004 06:51:48




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 Re: M5 radiator spewage in reply to Jerry E., 09-28-2004 19:46:27  
Since it is doing it at the hiher RPMs, I would suggest you get a thermostat installed. The water pump is likely moving the water to the top side of the radiator faster than it can flow back to the bottom. The thermostat will regulate (reduce) the flow. If it continues to be a problem, you might have a compression leak.



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Larry O.

09-29-2004 03:48:19




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 Re: M5 radiator spewage in reply to Jerry E., 09-28-2004 19:46:27  
With out seeing the tractor, I'd say it has a cracked head. I had a 670 doing that and that was its problem.



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Jerry E.

09-29-2004 19:54:00




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 Re: M5 radiator spewage in reply to Larry O., 09-29-2004 03:48:19  
thanks fellows I'll install a thermostat, and see if that helps.
The heads were reconditioned when we rebuilt it, so if thats it, then I'll just be addiung coolant.
Thanks for your help,
Jerry



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deadeye

09-30-2004 06:53:51




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 Re: M5 radiator spewage in reply to Jerry E., 09-29-2004 19:54:00  
Jerry:

My "U" and "GTB" done that also. I put 4 lb. caps on with an 1/8 inch hole drilled in the top of it with it just turned on the radiator a little bit....Worked for me.---JB--deadeye

Of course on the "GTB" I soldered a radiator cap connector on the old flat plste style lid that snapped on with the wire bale.



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Jerry eaton

03-07-2006 04:21:33




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 Re: M5 radiator spewage in reply to deadeye, 09-30-2004 06:53:51  
I installed a proper 180 degree thermostat and that helped, but did not solve the problem.
I think the moline engineers were drunk the day they came up with the M5. A U is a much better tractor. the 3 pt is an afterthought, it over-centers on a mole hill, leaks every fluid imaginable (some I didn't know it had:)and drinks fuel. If you can get is hooked up to something, and the hydraulics will work, then chances are its going to spew something else. If I only had experience with this M-M I'd probably haul it off and buy green.

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