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  1. 02-02-2013, 02:53 PM #1
    Plysage
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    Mf 135, JD 750

    Default JD 750 won't start

    I've never had a problem with it before. Fired right up this morning. Now it Won't turn over. All ignition lights etc come on when I turn the key. All lights, flahers etc work fine. It will start jumping across the starter leads. Check the PTO switch, neutral switch, harness, ground, tried jumping (no luck), checked ignition switch. Everything seems to be in order. Ideas?
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  3. 02-02-2013, 03:23 PM #2
    DFB
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    Default Re: JD 750 won't start

    Starter relay?
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  4. 02-02-2013, 04:09 PM #3
    grsthegreat
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    Default Re: JD 750 won't start

    i used to have issues with my JD870's seat switch.

    very touchy little things. when it gave me issues, tractor wouldnt start up.

    had to keep it cleaned and lubed.
    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
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  5. 02-02-2013, 04:28 PM #4
    DFB
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    Default Re: JD 750 won't start

    I did some site searching for you and found 2 threads dealing with similar problems. Seems there is no starter relay on that model but you can easily add one to the starting circuit. Check wire from key switch to starter.

    http://www.tractorbynet.com/forums/j...-starting.html

    http://www.tractorbynet.com/forums/j...-starting.html
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  6. 02-02-2013, 04:30 PM #5
    Plysage
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    Mf 135, JD 750

    Default Re: JD 750 won't start

    Where is the relay on this tractor? grsthegreat suggested seat switch. I don't see a seat switch on this. At least not the type I'm familiar with like the on the 455.
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  7. 02-02-2013, 04:43 PM #6
    Plysage
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    Default Re: JD 750 won't start

    Thank you for the links, good info. I've gone over the harness/connections pretty well and they seem fine and in good condition. Seems the relay idea is pretty popular. Is the relay acting as a step up transformer or capacitor? How involved is the install?
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  8. 02-02-2013, 04:48 PM #7
    Rock knocker
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    Default Re: JD 750 won't start

    Quote Originally Posted by Plysage View Post
    Where is the relay on this tractor? grsthegreat suggested seat switch. I don't see a seat switch on this. At least not the type I'm familiar with like the on the 455.
    These series tractors only have a neutral and (?)PTO safety switch.
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  9. 02-02-2013, 04:50 PM #8
    Rock knocker
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    Default Re: JD 750 won't start

    Quote Originally Posted by Plysage View Post
    Thank you for the links, good info. I've gone over the harness/connections pretty well and they seem fine and in good condition. Seems the relay idea is pretty popular. Is the relay acting as a step up transformer or capacitor? How involved is the install?
    No, a relay is a relay.
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  10. 02-02-2013, 04:54 PM #9
    DFB
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    Default Re: JD 750 won't start

    Shouldnt be difficult relays act as the contact from ignition switch to starter/solenoid
    Last edited by DFB; 02-02-2013 at 05:31 PM.
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  11. 02-03-2013, 03:17 PM #10
    Plysage
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    Default

    Problem solved. Faulty/intermittent PTO switch. Thanks guys.
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