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  1. #1
    New Member Blueflint's Avatar
    Join Date
    Dec 2005
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    24
    Location
    Winchester, Ohio
    Tractor
    Deere 1020

    Default Correct thermostat for 1020 gas Deere?

    I almost have the engine back together in my 1969 135 ci gas 1020 (in frame rebuild after sleeves were leaking). I had picked up a replacement thermostat that Stant listed in their catalog, pn 45358, 180 degree. This evening while cleaning up the housing getting ready to assemble things, I noticed the thermostat I removed was 160 degree. This is a low hour (1,500) un-molested tractor and it appears to me to never been apart so I am tinking this is the original factory installed unit??????? The one I removed from the tractor is a Robert Shaw Controls Company unit. Was this factory installed? What temp should I use?

    Thanks, Tony

  2. #2
    Super Member Tx Jim's Avatar
    Join Date
    Jan 2007
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    5,065
    Location
    North Texas
    Tractor
    JD 4255/Kubota M7040 HDC

    Default Re: Correct thermostat for 1020 gas Deere?

    I think the 180 degree thermostat will be better no matter what tractor came from the factory with. Warmer operating temp. to a point is better than colder temp's.

  3. #3
    Veteran Member
    Join Date
    Dec 2001
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    1,017
    Location
    Maryland

    Default Re: Correct thermostat for 1020 gas Deere?

    The factory thermostat for the gas was 160*. The diesel was 205*. 180* was optional for either engine. It depends on what you will be doing with it. If doing mostly light duty work, I would recommend the 180*. If you will be doing heavy work, (plowing for example) I would recommend the 160*. Should be a little less likely to have problems with vapor lock in hot weather. Just my opinion, for what it's worth.

  4. #4
    New Member Blueflint's Avatar
    Join Date
    Dec 2005
    Posts
    24
    Location
    Winchester, Ohio
    Tractor
    Deere 1020

    Default Re: Correct thermostat for 1020 gas Deere?

    I am going to run the 180 and see how it goes. I know on most water cooled carburated engines, 180 seems to work the best. I'll keep an eye on things and go from there. Thanks guys. Tony

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