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Tractor Talk Discussion Forum

cooling system

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Donnie

07-28-2003 20:45:26




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I have a '57 WD 45 and have a few questions concerning it's cooling system. I noticed a few days ago that after the engine heated up, steam was coming out of the radiator overflow tube near the radiator cap. Does this mean that my brand new radiator cap is not sealing properly? Any way to fix that? Also, while in the process of checking this out, I decided to replace the thermostat. Well, when I took it apart I discovered that there isn't even a thermostat currently installed. Is this normal? Sorry for my ignorance, but which way do I put the new thermostat in? Finally, is there a way to check to see if the water pump and radiator are working properly? Thanks in advance.

Donnie

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wdTom

07-29-2003 17:11:16




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 Re: cooling system in reply to Donnie, 07-28-2003 20:45:26  
Since you are putting a gauge and thermostat in and will know what it is running, do you know what it should run? AC says in their manual for gas it should be 170 and, 190 for low octane (tractor fuel). These are MINIMUM temperatures. The AC gauge had a green or normal zone up to 220 degrees. The standard radiator cap for a WD was not pressurized, the pressure cap was an extra to allow higher operating temperatures. This information is right of my reprint of an AC operators manual. If you don't have one it is very informative as is the repair manual.

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I like Case

07-29-2003 06:36:03




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 Re: cooling system in reply to Donnie, 07-28-2003 20:45:26  
You need a thermostat (or a restictor). Without it the coolant can flow to fast to cool-don't spend enough time in the radiator. The bulb end of the thermostat goes toward the engine-the pointed end toward the radiator hose. Beyond that check that you can see through the fins of the radiator-if you can't, clean it out. Is there corrosion in the tubes? If so you may need to remove it and have it boiled out. With the lower radiator hose off, start adding water to the radiator. If you can fill the tank faster than the water is coming out the bottom it is restricted. If you are pushing pressure out the radiator cap maybe you have a head gasket leaking compression into the cooling system. Is the tractor running hot?

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Donnie

07-29-2003 16:29:40




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 Re: Re: cooling system in reply to I like Case, 07-29-2003 06:36:03  
Thanks for the advice. I don't know for sure if the tractor is running hot. The temp gauge doesn't work, but I'm replacing it today, so hopefully will have more info later. This steam thing just recently started happening. I had it running for a couple hours at a time earlier this spring moving dirt and never noticed any problems. Anyway, thanks again and I'll try all that you've suggested.

Donnie

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Kraig

07-29-2003 00:04:16




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 Re: cooling system in reply to Donnie, 07-28-2003 20:45:26  
If there isn't a thermostat in it somebody had a problem with it over heating and took it out to get extra waterflow. Is your radiator in good shape? Blow it out make sure the fins are clean, check for scale down in it or flush it out. Feel the top radiator hose to see if u have good waterflow with the engine running, u can squeeze on it and feel the water rushing through.If u do try another thermostate make it one with the lowest opening temperature possible. If it is steaming even without a thermostaat in it, it is still getting pretty warm for some reason. (Maybe the waterpump is bad or a loose belt.

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