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Re: When WD tractor is running should the radiator cap be ho

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10-02-2012 21:59:59

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I am just going to take a guess here...don't know if I am right or not but taking an educated guess. When the tractor is running the thermal-syphoon system or however you say that, is flowing the anti-freeze through the block and radiator cooling it. When you stop the tractor the anti-freeze isn't being pushing through it, so I am thinking it picks up all the head from the block and your feeling that. But the motor isn't running and your not working the tractor so it's not doing any harm, just cools down slowly then. Just make sure to idle it a few minutes before shutting it off after working hard, I do that with my Super A and it's fine. Sure others will chime in...

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10-02-2012 23:01:26

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 Re: When WD tractor is running should the radiator cap be ho in reply to Badger08, 10-02-2012 21:59:59  
Your theory and observation is right, but it's not a thermo-siphon system- that's in the older JD two bangers that had no water pump. WD has a water pump, and if just idled down and shut off, 'latent' heat in the engine makes the temp go up.....water is not being circulated by the pump and being cooled by the radiator. Heat rises- on the WD, right up the hose to the temp gauge screwed into the top of the tank.

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