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  1. #1
    Veteran Member foggy1111's Avatar
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    Dec 2008
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    2,488
    Location
    Nisswa, MN
    Tractor
    JD 3320 eHydro w/ 300CX Loader

    Default 790 block heater??

    I have a 790 tractor that I would like to put a block heater on. I like the frost plug style heaters and saw the left side of the tractor has an easy-to-get to plug that I had planned to use (measures 1.175".....so it must be a metric size plug) and its at the back of the engine block. I didnt find any mention of the heater in the JD operator manual.

    HOWEVER...when I went to the NAPA store to get the heater....the guy behind the counter comes up with a thread-in plug. I have an older (02?) 790. Do they have a threaded spot in the block for a heating element?? I would prefer that....but have been unable to locate that.

    Anyone put a heater on the 790? What did you use? Also, is there a way to check the serial number for the production year? I think this may be an issue with parts as time goes on......so I better find out for sure. As my 790 has a model 70 loader.....It may be a bit older model than I thought when I bought it.

  2. #2
    Veteran Member
    Join Date
    Mar 2008
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    1,499
    Location
    Maine
    Tractor
    Deere 3520 Cab, Deere F935

    Default Re: 790 block heater??

    http://www.phillipsandtemro.com/User...atalog_WEB.pdf

    Head on down to the Yanmar section...PG 65 in the catalog
    Looks like the same setup as what was on my F935...JD wants you to buy a ton of parts...see attached...
    I went with the Zerostart PN# 3500001 which was basically "Everything in one" and it only cost 35.00 for the whole shebang including the cord and even the installation bolts. Dunno if it would fit yours....
    I'm guessing if you keep what you got, you'll need to get the adaptor plate from JD: "M800125 - ADAPTER FITTING"
    Attached Thumbnails Attached Thumbnails -heater-jpg  

  3. #3
    Gold Member KENSFM's Avatar
    Join Date
    Dec 2002
    Posts
    470
    Location
    MA
    Tractor
    JD 2210 JD318 JD332

    Default Re: 790 block heater??

    Dave,
    Where did you get the Zerostart P/N 3500001 for $35? It looks like just what I need for my JD2210. The company in your link will not sell direct to me.
    Thanks, Ken
    "Wake up, if you want your dreams to come true."

  4. #4
    Advertiser kennyd's Avatar
    Join Date
    Jul 2003
    Posts
    11,591
    Location
    Westminster, MD
    Tractor
    John Deere 4110, 455

    Default Re: 790 block heater??

    Also, is there a way to check the serial number for the production year?
    Sure, just take the S/N to a JD dealer and they will look it up, they can also give you a service history on it if it's ever been to any dealer for service.

    JD does sell a block heater for your tractor, have you priced it?
    KennyD
    www.boltonhooks.com



    Bolt On Grab Hooks, Weld On Grab Hooks, Specialty Chain Accessories, Specialty Hydraulic Components.

    Simple JDParts Tutorial HERE

  5. #5
    Veteran Member foggy1111's Avatar
    Join Date
    Dec 2008
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    2,488
    Location
    Nisswa, MN
    Tractor
    JD 3320 eHydro w/ 300CX Loader

    Default Re: 790 block heater??

    Quote Originally Posted by kennyd View Post
    Sure, just take the S/N to a JD dealer and they will look it up, they can also give you a service history on it if it's ever been to any dealer for service.

    JD does sell a block heater for your tractor, have you priced it?

    Thanks for the advice on the SN.....gonna check that out.....and I will check to see what John deere has for the heater. Thanks

  6. #6
    Veteran Member
    Join Date
    Mar 2008
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    1,499
    Location
    Maine
    Tractor
    Deere 3520 Cab, Deere F935

    Default Re: 790 block heater??

    Quote Originally Posted by KENSFM View Post
    Dave,
    Where did you get the Zerostart P/N 3500001 for $35? It looks like just what I need for my JD2210. The company in your link will not sell direct to me.
    Thanks, Ken
    A local "Napa Type" shop that specializes in heavy truck parts & pieces...The kind of place you go if you want some LED lights for your 53' Reefer trailer and a 55 Gallon Drum of Rotella T.... I had googled ZeroStart dealers in my area and thats how I found them. They had to order it, and actually got a laugh at how small it was, but they were excelent....I brought them a print out of the Catalog Page, highlighed, etc...so all he had to do was pick the phone up & call.

  7. #7
    Bronze Member
    Join Date
    Nov 2007
    Posts
    96
    Location
    New Brunswick, Canada
    Tractor
    JD 755, Kioti DK40SE

    Default Re: 790 block heater??

    I wish I had known about the Zerostart option about a week ago, I just bought the kit for my 755 from my local dealer for about $120 for both pieces. The heater works great and warms the engine up pretty fast but I'm sure the $35 heater works just as well.

    Jason

  8. #8
    Gold Member Mech's Avatar
    Join Date
    Jan 2007
    Posts
    404
    Location
    Pine, CO
    Tractor
    3520 CAB

    Default Re: 790 block heater??

    My element burned out and I think it was $65 at JD. The short cord that plugs into it is an additional cost. You will have to drain your anti-freeze to put it in.

  9. #9
    Veteran Member
    Join Date
    Mar 2008
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    1,499
    Location
    Maine
    Tractor
    Deere 3520 Cab, Deere F935

    Default Re: 790 block heater??

    Quote Originally Posted by unimog_jason View Post
    I wish I had known about the Zerostart option about a week ago, I just bought the kit for my 755 from my local dealer for about $120 for both pieces. The heater works great and warms the engine up pretty fast but I'm sure the $35 heater works just as well.

    Jason
    The heater on my F935 (Zerostart) is 3x the heater thats in my 3520....in 40 minutes I could get the water in the F935 to the point of the block being HOT to the touch...it would literally melt the snow off the hood...
    I left my 3520 plugged in overnight accidently the other day (factory Heater) and it was barely lukewarm....I mean it was warm, but nothing like the other one....I suspect the Zerostart unit is of higher wattage, when I plugged it in the lights in the garage would dim...no joke... When I plug in the 3520 it doesnt draw as much juice. So realistically, I feel that the not only is the Zerostart cheaper, its BETTER by a long shot.

  10. #10
    New Member
    Join Date
    Dec 2008
    Posts
    13

    Default Re: 790 block heater??

    Will that Zerostart part number work in a 770 as well? Is the Yanmar model the same part match? Thanks...

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