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  1. #1
    Silver Member
    Join Date
    Apr 2008
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    215
    Location
    Bigfork, Mn.
    Tractor
    JD 4110HST

    Default Testing a block heater

    I have a 2004 JD 4110 with a JD block heater. Is there a test I can do to see if it is working? This morning I had it on for about an hour and a half. When I went to start it, it turned over rather slow, but started OK. Of course, one other possibility is the battery is getting tired--it is the original battery. Any feedback is welcomed. Thanks, Jim
    P.S. It was zero degrees but in a garage.

  2. #2
    Super Member grsthegreat's Avatar
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    Jan 2011
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    6,425
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    north idaho
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    dk45se hst cab

    Default Re: Testing a block heater

    if you have a clap on meter, you can do an amp test on one leg of the circuit. see if theres a draw. you cant just clamp it around the entire cord, you need to do it around only one wire (black) of the 120 volt circuit.
    currently own
    2011 Kioti DK45SE HST CAB tractor/loader, Jimna 6" - 3 point wood chipper, 60" JD Brush Hog, JD 60" Rototiller, 3 point post hole digger with hydraulic assist, 3 point spring tooth rake, Fimco 55 gallon weed sprayer with 12 foot boom, 3 point hydraulic wood splitter (home built)
    Quick Attach 79" loader mount snowblower & rear powerpack
    Quick Attach 84" Snow Blade
    Quick Attach 42" pallet forks

  3. #3
    Veteran Member
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    Mar 2010
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    1,736
    Location
    Ontario
    Tractor
    CT235

    Default Re: Testing a block heater

    Cord should get warm to the touch. Make sure the extension cord it's on is a decent gauge and not too long.
    Tim.

  4. #4
    Super Member RickB's Avatar
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    Sep 2000
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    7,220
    Location
    Eastern NY
    Tractor
    Case 885, JD 730D, Ford 4000

    Default Re: Testing a block heater

    Easiest way to test them is to plug them in to a known power source. Every one I have ever owned or used that was functional got hot to the touch within seconds.
    We have too much gun control.
    What we need is more idiot control.

  5. #5
    Super Member grsthegreat's Avatar
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    Jan 2011
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    north idaho
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    dk45se hst cab

    Default Re: Testing a block heater

    Quote Originally Posted by RickB View Post
    Easiest way to test them is to plug them in to a known power source. Every one I have ever owned or used that was functional got hot to the touch within seconds.
    but you have to remove it from block to test it this way. A meter can test it while installed.
    currently own
    2011 Kioti DK45SE HST CAB tractor/loader, Jimna 6" - 3 point wood chipper, 60" JD Brush Hog, JD 60" Rototiller, 3 point post hole digger with hydraulic assist, 3 point spring tooth rake, Fimco 55 gallon weed sprayer with 12 foot boom, 3 point hydraulic wood splitter (home built)
    Quick Attach 79" loader mount snowblower & rear powerpack
    Quick Attach 84" Snow Blade
    Quick Attach 42" pallet forks

  6. #6
    Super Member RickB's Avatar
    Join Date
    Sep 2000
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    7,220
    Location
    Eastern NY
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    Case 885, JD 730D, Ford 4000

    Default Re: Testing a block heater

    Quote Originally Posted by grsthegreat View Post
    but you have to remove it from block to test it this way. A meter can test it while installed.
    What?????? Plug it in, touch it, how much easier can it be? No removal necessary, no meter necessary. They either work or they don't.
    We have too much gun control.
    What we need is more idiot control.

  7. #7
    Super Member grsthegreat's Avatar
    Join Date
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    north idaho
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    dk45se hst cab

    Default Re: Testing a block heater

    Quote Originally Posted by RickB View Post
    What?????? Plug it in, touch it, how much easier can it be? No removal necessary, no meter necessary. They either work or they don't.
    ?? my block heater on the JD870 didnt get hot to the touch at all. Maybe im thinking of something else than what your talking about. I cant even reach the ones on my trucks...there buried up underneath everything else.

    The only way i knew my old JD was working was the tractor started up easier with it plugged in.
    currently own
    2011 Kioti DK45SE HST CAB tractor/loader, Jimna 6" - 3 point wood chipper, 60" JD Brush Hog, JD 60" Rototiller, 3 point post hole digger with hydraulic assist, 3 point spring tooth rake, Fimco 55 gallon weed sprayer with 12 foot boom, 3 point hydraulic wood splitter (home built)
    Quick Attach 79" loader mount snowblower & rear powerpack
    Quick Attach 84" Snow Blade
    Quick Attach 42" pallet forks

  8. #8
    Super Member RickB's Avatar
    Join Date
    Sep 2000
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    7,220
    Location
    Eastern NY
    Tractor
    Case 885, JD 730D, Ford 4000

    Default Re: Testing a block heater

    Quote Originally Posted by grsthegreat View Post
    ?? my block heater on the JD870 didnt get hot to the touch at all. Maybe im thinking of something else than what your talking about. I cant even reach the ones on my trucks...there buried up underneath everything else.

    The only way i knew my old JD was working was the tractor started up easier with it plugged in.
    The OP has a tractor. Coolant heaters I have owned were installed in tractors, with one exception. Generally you can walk up to a block heater in a tractor and touch it, sometimes after opening a hood or removing a side panel. I can't imagine a functioning block heater on a Deere 870 or anything else for that matter that didn't get warm to the touch. By definition they make heat. It's kind of amazing to even be involved in a discussion of this nature. I've been using coolant heaters in diesel tractors for the past 40 plus years. It's not new technology, or something I'm guessing about.
    We have too much gun control.
    What we need is more idiot control.

  9. #9
    Super Member grsthegreat's Avatar
    Join Date
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    6,425
    Location
    north idaho
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    dk45se hst cab

    Default Re: Testing a block heater

    Quote Originally Posted by RickB View Post
    The OP has a tractor. Coolant heaters I have owned were installed in tractors, with one exception. Generally you can walk up to them and touch them, sometimes after opening a hood or removing a side panel. I can't imagine a functioning block heater on a Deere 870 or anything else for that matter that didn't get warm to the touch. By definition they make heat.
    My 870 had it in a freeze plug somewheres on the engine...dont remember where. There was a plug that ran down and was zipped tied next to the starter. thats all i remember about it. Whenever i want to know if something electrical is working, i use a clamp on meter. a can get a reading and know in a matter of seconds how many watts its pulling. Been an electrician for 30 years. Old habits are hard to break
    currently own
    2011 Kioti DK45SE HST CAB tractor/loader, Jimna 6" - 3 point wood chipper, 60" JD Brush Hog, JD 60" Rototiller, 3 point post hole digger with hydraulic assist, 3 point spring tooth rake, Fimco 55 gallon weed sprayer with 12 foot boom, 3 point hydraulic wood splitter (home built)
    Quick Attach 79" loader mount snowblower & rear powerpack
    Quick Attach 84" Snow Blade
    Quick Attach 42" pallet forks

  10. #10
    Epic Contributor Soundguy's Avatar
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    ym1700, NH7610S, Ford 8N, 2N, NAA, 660, 850 x2, 541, 950, 941D, 951, 2000, 3000, 4000, 4600, 5000, 740, IH 'C' 'H', CUB, John Deere 'B', allis 'G', case VAC

    Default Re: Testing a block heater

    Quote Originally Posted by Pipestone Kid View Post
    I have a 2004 JD 4110 with a JD block heater. Is there a test I can do to see if it is working? This morning I had it on for about an hour and a half. When I went to start it, it turned over rather slow, but started OK. Of course, one other possibility is the battery is getting tired--it is the original battery. Any feedback is welcomed. Thanks, Jim
    P.S. It was zero degrees but in a garage.
    a good 'combo' to go with a block heater is a trickle charger on t he battery.

    have a timer setup to turn the block heater and the trickle charger on. additionally.. a mag heater on the oil pan and the hydro pan will help.. that way you have warmed coolant.. engine oil.. and hydro oil.. plus a topped off and warmed battery. that's a magic combo for good starting in cold weather for a diesel.
    souNdguy

    sent from my NOKIA LUMIA

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