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Avery cooling

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David B

09-18-2002 18:12:05




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A friend wonders if the Avery tractors with out a water pump would have a pressure radiator cap. He thinks his top hose gets so much hotter than the lower one that he has a cooling proplem.




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Alberta Mike

09-19-2002 05:40:40




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 Re: Avery cooling in reply to David B, 09-18-2002 18:12:05  
The top hose getting hotter than the bottom one is normal since the coolant inside the top hose is coming directly out of the cylinder head (hot) while the coolant leaving the bottom rad hose has been cooled inside the radiator. As far as the pressurized cap, to my understanding the reason is simply to raise the boiling point of the coolant so the tractor could run hotter without the coolant boiling over. I would think it would be up to him to use one, I don't think the pressure change is going to affect the thermosiphon functioning, that works because of a basic principle of physics, heat rising and cold dropping.

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Gene Davis

09-18-2002 19:22:37




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 Re: Avery cooling in reply to David B, 09-18-2002 18:12:05  
Please excuse the extra post, hit the send button twice. gene



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Gene Davis

09-18-2002 19:20:24




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 Re: Avery cooling in reply to David B, 09-18-2002 18:12:05  
This is known as the thermo-siphon cooling principle, based on the theory that the hot water rises, and the cooler water sinks.These systems seem to work best with copper, or brass radiator cores that could dissipate heat well, the fan must move a good air flow through the radiator. If you are going to use anti-freeze in these systems, you must mix it BEFORE putting it in the raditor, because if not mixed thoroughly, the antifreeze will settle to the bottom of the system and because it is thicker than the water it will affect circulation and make the system run hot. Gene Davis

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Gene Davis

09-18-2002 19:17:42




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 Re: Avery cooling in reply to David B, 09-18-2002 18:12:05  
This is known as the thermo-siphon cooling principle, based on the theory that the hot water rises, and the cooler water sinks.These systems seem to work best with copper, or brass radiator cores that could dissipate heat well, the fan must move a good air flow through the radiator. If you are going to use anti-freeze in these systems, you must mix it BEFORE putting it in the raditor, because if not mixed thoroughly, the antifreeze will settle to the bottom of the system and because it is thicker than the water it will affect circulation and make the system run hot. gene Davis

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David B

09-18-2002 20:29:23




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 Re: Re: Avery cooling in reply to Gene Davis, 09-18-2002 19:17:42  
I understand about the thermo-siphon principle, how about the type of radiator cap?



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Esev

09-19-2002 09:54:29




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 Re: Re: Re: Avery cooling in reply to David B, 09-18-2002 20:29:23  
David, A pressure radiator cap will not make a difference. If you notice just inside the top of the radiator there is a overflow/vent tube that leads to atmosphere, thus will not allow the pressure cap to build pressure. I would leave it as it is, and maybe slap a temperature gauge on it to see what it is doing. Should run about 165 to 185 degrees. Could run as high as 195 without being to much of a problem. The little Herc will let you know if it is running too hot.

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