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JD M Cooling System

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J. Jackson

07-03-2001 19:45:54




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I just purchased A 1948 M. The gets up to almost 230 degrees. Is this to hot or is it normal. I assume it does not have a water pump because I cant find. Any imformation on this will be a big help.




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ToddT

07-05-2001 03:06:28




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 Re: JD M Cooling System in reply to J. Jackson, 07-03-2001 19:45:54  
Here is some information on the M/40/320 cooling system. Yes, these do run hot. However, there may be some suggestions here that will insure that the cooling system is running properly.

M/40/320 Cooling System

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Rick

07-04-2001 18:50:49




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 Re: JD M Cooling System in reply to J. Jackson, 07-03-2001 19:45:54  
J. We have both a M and MT. They both run pretty hot particulary the M. Like the others we have just ran them and made sure they are full of coolant. Rick



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Will

07-04-2001 13:42:24




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 Re: JD M Cooling System in reply to J. Jackson, 07-03-2001 19:45:54  
Since I owned my B I ran just water. It would run no hotter than 200 degrees. Put in 50/50 water and antifreeze for winter for the first time. Got out the 2-16 that I always pulled and the B was running 230 degrees. It would get to 200 degrees doing nothing. One guy told me to run just water again. So I did, and back to 200 degrees under full load. Just did a parade pulling a 20' trailer in 80 degree weather and never went over 150 degrees. This is just my 2 cents worth.

William

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Bus Driver

07-04-2001 17:11:20




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 Re: Re: JD M Cooling System in reply to Will, 07-04-2001 13:42:24  
It is true that water alone is more efficient at transferring heat than the water/antifreeze mixture. Water alone will cause rusting, which will make heat transfer less efficient. Could we stipulate that many of the freeze-damaged tractors were a result of owners using water only and waiting one day too long to get the cooling system drained for the winter? Also, adding water to a dry cooling system in the winter and then cranking the tractor may also result in freeze damage. The cold air through the radiator may freeze the water before it gets warm enough to start circulating. Then the engine will boil! Don't ask me how I know these things!

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Skip

07-03-2001 20:29:10




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 Re: JD M Cooling System in reply to J. Jackson, 07-03-2001 19:45:54  
That sounds about right it seems like my MT runs in that range. It used to concern me but after 10 or 12 years it dosen`t seem to bother me anymore. You were right about the water pump there ain`t one, the little engine cools by radiant convection. Just keep it full of water and antifreeze and as long as she isn`t boiling over I think you are ok.



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Chuck

07-04-2001 20:38:47




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 Re: Re: JD M Cooling System in reply to Skip, 07-03-2001 20:29:10  
be sure you have a good radiator cap that will seal. This is add to the siphon effect of the cooling. Would recommend a lighter mixture of coolant and water.



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