JD 950 with Yanmar engine electrical issue
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Thread: JD 950 with Yanmar engine electrical issue

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    JD 950 with Yanmar engine electrical issue

    I am having trouble with getting my 950 to start. When I turn the key, I just get a click from what I think is the voltage regulator and no turning of the starter. I have replaced the ignition switch, checked connections and searched for broken wires, etc. I don't know where to turn, as I have had this tractor for about 4 years and had no problem like this before. Looking for help with ideas on what to do next. Oh, I did try to jump the starter and could not get anything then either. Thanks
    Yank and trboxman like this.

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    trboxman's Avatar
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    You might want to give the starter a medium whack with a rubber mallet and try to start it again. Sometimes a bit of rust will keep the starter gear from engaging the teeth on the flywheel.
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    If Im not mistaken (Im, old, I could be) piggybacked on the starter motor (you may know this- apologies if so) is the starter solenoid- its jobs are to 1. pull a plunger in that engages the starter gear into the flywheel ring gear AND THEN 2. close a set of heavy contacts that connects the starter motor directly to the battery. Wear, corrosion or misalignment of these contacts (they usually resemble a washer and two heavy stud contacts) will fail to close the motor circuit - motor no run but the solenoid clicks. There are rebuild kits for most solenoid switches short of a full starter R&R.
    Last edited by Superglidesport; 05-27-2019 at 11:53 AM.
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    John R's Avatar
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    Check the ground from the battery to the frame, these things can cause all kinds of problems.
    Make sure it's clean and tight.
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    John

    2016 JD 3046 R Cab, With 165 Loader / Power Angle Rear Blade / Brush Hog / Forks / Box Blade / and Tiller.

    Previous tractors: 2002 JD 4310 E Hydro, 2006 Kubota 2350, Both gone to new homes.

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    theduke's Avatar
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    Oh Lord this brings back memorys...

    Fought this issue with one of our 955's till it finally exited the premisis.

    Heres what we did to start it.

    Get yourself a hefty chunck of wire...whatever 12 G ish. about a foot long.

    When it... " clicks".
    Pull the small wire from starter..it just plugs in ..the tiny one.

    Take your new "friend" /wire.....hold one end on Hot post of starter

    THEN

    take other end and stick in hole where Tiny wire was connected to starter.
    ------------------------------------------------------------------------------
    MINE IS A HYDRO TRANNY yours is a STICK

    Be Sure its in NEUTRAL
    ------------------------------------------------------------------------------------------------
    If you do this while Key is on...tractor will start.

    Sometimes it just needs a "bump" ( key off) and you can RE connect small wire and it will start as normal.


    JD dealer could never fix this for us..We Begged them to replace ignition switch and they refused..said they never go bad

    Checked the grounds @ motor mounts.. nothing ever fixed it.

    Possible starter issue to the tune of $450 bucks..Yea I passed on that...1 foot of wire ..bent in a circle..stored under hood around fuel cap.

    Always got it going... Usually after the first start and warmed up it would start every time as normal.

    It was a intermitten issue with no rhyme or reason...reminds me of another issue..

    My story...yours may differ...it was a cheap easy fix for a pita situation.

    --------------------------------------------------------------------------------------------

    And Yes ...these tractors are very insitant on Clean Battery connections.

    Like Nothing I've ever dealt with before.

    If you think its clean...scrape it again till shiney lead is showing.

    Get the Red battery grease/spray whatever once you are sure both battery wire and bat terminal are Clean.
    Goop it up.

    Good luck & post your fix please...
    Last edited by theduke; 05-13-2019 at 11:43 PM.
    Dan


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    Quote Originally Posted by trboxman View Post
    You might want to give the starter a medium whack with a rubber mallet and try to start it again. Sometimes a bit of rust will keep the starter gear from engaging the teeth on the flywheel.
    Thanks- I tried that and no luck.

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    Thanks for the suggestions. I ordered a new voltage regulator yesterday. Don't know how that might affect starting, but mine had several wires broken and corroded. Tried splicing together, but still got the click and no starter turning. I'll try some of the other tips and see what works.

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    steveontheridge2's Avatar
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    You better check your battery.

    Try this, use another known good battery to jump the starter.

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    My 650 had the same problem, it was just the battery being low. Another time it was a loose cable.
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    I have a 650 as well. I have had issues with starting it, but usually it was just a weak battery or a loose connection at battery terminal. Checked all these on the 950 and no luck so far. Waiting for new voltage regulator to see if that makes a difference.

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