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Discussion Forum

Re: Model B Thermostat

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John W.

10-27-2002 17:15:49

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Rick; You must remember these tractors are low pressure cooling systems. Installing a 170 or 180 degree thermostat will cause the system pressure to rise well above the 6 to 7 pounds the radiator was designed to work under. Two problems with this come to mind. 1) You will blow out a core or split a tank on the radiator. 2) You could cause a blown head gasket, They were not designed to seal this high of pressure. Something to think about before you raise the cooling system pressure.

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10-28-2002 10:00:05

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 Re: Re: Model B Thermostat in reply to John W., 10-27-2002 17:15:49  
I don't understand how it would get over 6 psi if it had a 6 psi pressure cap.

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10-28-2002 16:09:52

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 Re: Re: Re: Model B Thermostat in reply to DaveInMI, 10-28-2002 10:00:05  
i took mine to AUTO ZONE and matched it up with a 180 degree unit for a car. Installed and it still runs 130. ??? I know it is spring loaded and might leak by a little bit. Alos has a weep hole to keep some recirculation with thermostat closed, but i wonder if the motor really puts out any heat. My radiator is normally cool and i dont heavy load the tractor.

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Bryan Smith

10-30-2002 08:13:16

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 Re: Re: Re: Re: Model B Thermostat in reply to steve, 10-28-2002 16:09:52  
It's just a cool-running tractor. You can run them without thermostats as mentioned, but I did order one for one of my B's - it was a 150 degree thermostat. The tractor runs 150 to 160, maaaybe 170 on a 95+ degree day. I haven't seen it it 180 at all. My CA is the same way, and I've cultivated with that tractor in 100 degree weather for 10-12 hour days when I was younger.

I think the thermostat is a good idea - get the temp up to try and get at least some of the condensate out of the crankcase. If you don't have that regular oil changes are a must.

And by the way, if the fan stops turning it will overheat in about 3 minutes or less - had that happen when I installed too long a bolt in the cowling by accident - which hit a fan blade and stopped it from turning (had an althernator and a small belt on it at the time and was easy to stop the fan).

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