4010 positive ground
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    4010 positive ground

    I bought a gas 4010 JD not running, it still has the generator on it. It has a new battery on it and it's hooked up neg ground. How can I tell which way it needs to be hooked up. It has a very weak spark the way it is now.

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    AlKozak's Avatar
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    Quote Originally Posted by dvskenny View Post
    I bought a gas 4010 JD not running, it still has the generator on it. It has a new battery on it and it's hooked up neg ground. How can I tell which way it needs to be hooked up. It has a very weak spark the way it is now.
    If I understand correctly, this is actually a 24v system. Two 12V batteries in series (4 6V batteries from the factory). 24V is used for the starter, which is supposed to be floating (I've never seen such a beast, but that's no reason to believe it doesn't exist). The connection between the batteries (assuming 2 12V) is where the system is grounded, so depending on your point of reference it is a positive ground for one of the batteries and negative for the other. The 12V loads are shared between the batteries. The generator supposedly needs to be repolarized if the charging system is ever disconnected.

    Here is some information I found.
    Refers specifically to some of the later diesels but tractordata.com says the 4010 system is a 24V floating, 12V positive ground so I assume yours is similar.

    Al
    Last edited by AlKozak; 09-24-2018 at 03:01 PM.

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    flyweight's Avatar
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    Quote Originally Posted by dvskenny View Post
    I bought a gas 4010 JD not running, it still has the generator on it. It has a new battery on it and it's hooked up neg ground. How can I tell which way it needs to be hooked up. It has a very weak spark the way it is now.
    If you 4020 GASOLINE tractor is wired as factory(has not been changed over), it should be a 12 Volt system, with a POSITIVE ground(see cable 24).

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    Michael

    2019 JD Z540R, 54" cutting deck w/MulchControl™
    1984 JD 750 Tractor
    1971 JD 15 Chainsaw, ← hasn't run since ~1975

    Also have a bunch of other useless stuff.










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    dvskenny (09-24-2018)

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    Thank you very much, that is the way it's wired. I'll check everything over and make her come to life again. It's a really nice all original tractor, just hasn't been used in the last year.
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    flyweight, is the white wire to the coil the one that goes to the starter area or is it the white wire to the key switch. I currently have no fire to the coil.
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    flyweight's Avatar
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    Quote Originally Posted by dvskenny View Post
    flyweight, is the white wire to the coil the one that goes to the starter area or is it the white wire to the key switch. I currently have no fire to the coil.
    It's been a while; and I don't have a Technical Manual, but to the best of my knowledge, the white from the coil goes to the "I" terminal at the Ignition Switch.

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    Michael

    2019 JD Z540R, 54" cutting deck w/MulchControl™
    1984 JD 750 Tractor
    1971 JD 15 Chainsaw, ← hasn't run since ~1975

    Also have a bunch of other useless stuff.










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    If your 4010 is positive ground be sure wire from ign switch to coil is attached to negative(-) post on ign coil.
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    Quote Originally Posted by flyweight View Post
    It's been a while; and I don't have a Technical Manual, but to the best of my knowledge, the white from the coil goes to the "I" terminal at the Ignition Switch.
    Ditto I think you're correct.

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    Quote Originally Posted by Tx Jim View Post
    If your 4010 is positive ground be sure wire from ign switch to coil is attached to negative(-) post on ign coil.
    It is, thanks. Thats what made me start thinking the battery was incorrect
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    Update on 4010

    Repaired the wire to the coil and hooked the battery up correctly, installed a new gas filter and changed the plugs...... Didn't turn over 1 full time till it started and run like a champ. Thanks everyone for their help

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