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Allis Chalmers Discussion Forum
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Cool running Model B

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DavidKittle

11-16-2006 09:58:43




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Hello;

I have a 1951 Model B that runs at 140 degrees with the radiators shutters closed after running and driving it for thirty minutes.I believe that this is supposed to be more around 190 or so,not at 140. The temperature here is 40 degrees. I also have installed a new thermostat and no change. Any ideas would be appreicated. thanks




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jeffalex2

11-17-2006 03:15:06




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 Re: Cool running Model B in reply to DavidKittle, 11-16-2006 09:58:43  
That's normal...it'll climb if you mow with a 5ft bush hog or pull something heavy like a loaded haywagon around for a while. Their designed to work hard...not just cruise around.



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85_Ranger4x4

11-16-2006 13:03:08




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 Re: Cool running Model B in reply to DavidKittle, 11-16-2006 09:58:43  
Most of our tractors will just get to the bottom of the operating range unless we are working them. I have ran a couple most of the day at parades and shows and they never come up past the edge of the green, up to it but never over.



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D13

11-16-2006 12:23:54




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 Re: Cool running Model B in reply to DavidKittle, 11-16-2006 09:58:43  
Why would you want it hot? As long as you can take the choke off and have it work, it's fine. Ran ours with NO thermostat plowing snow at 10F for many years, just have to keep the oil changed to prevent sludging.

Unless it's a distillate (kerosene?)model, in which case you are correct. The shutters should hel but yes the engine needs to be hotter to vaporize the fuel. In which case swapping the thermostat would be good.

The radiator in a B is about twice what it really needs. They will run 100% under full load with water and no pressure cap in the middle of summer (BTDT). When the pressure cap (raises boiling point) and glycol were added later that just increased the capability of the cooling system.

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RandyN

11-16-2006 12:14:11




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 Re: Cool running Model B in reply to DavidKittle, 11-16-2006 09:58:43  
If I'm correct, I believe the original thermostats for the B's were 145 degrees. It seems like I remember reading this in the owner's manual. I just sold a C that had a 145 degree thermostat in it. (Physically held it in my hand and it had 145 degree stamped on it) Later on, probably for parts inventory purposes, they changed to the 180 degree thermostat.

RandyN



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Tracy brown

11-16-2006 10:12:31




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 Re: Cool running Model B in reply to DavidKittle, 11-16-2006 09:58:43  
Stick a cooking thermometer in the radiator and make sure it is running at 140 and not just a bad gauge. That's what I would try first...



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DavidKittle

11-16-2006 10:21:49




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 Re: Cool running Model B in reply to Tracy brown, 11-16-2006 10:12:31  
I tried that and it says 140 degrees.



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