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Subject: 9n wont turn over

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will    Posted 06-09-2020 at 19:52:19 [URL] [DELETE]        [Reply] [Email]  
  • 9n wont turn over
  • My 9n with 12 volt system will not turn over now. I have had the starter rebuilt and even turned the starter ring gear with a screwdriver to put it with a new spot on the ring gear.I checked voltage with a meter and am getting 12 volts to the starter when I hit the starter switch but nothing happens. New battery and cables.I am stumped and help would be appreciated. I'm thinking worn ring gear but not sure. Dont want to split tractor if I dont have to...

    Jack - Iowa    Posted 06-10-2020 at 07:12:27 [URL] [DELETE]        [Reply] [Email]  
  • Re: 9n wont turn over
  • It would appear your problem is in the ground path. Did you happen to run that starter before you installed it? Was it painted during the rebuild?

    Try measuring for voltage between the starter case and the grounded post on the battery. Sounds like somewhere in that circuit you will find the problem.

    I can't remember if the 9N used a Bendix but if the starter gear is extended into the ring gear, the starter will not pick up that load.

    will    Posted 06-10-2020 at 12:50:57 [URL] [DELETE]        [Reply] [No Email]  
  • Re: 9n wont turn over
  • Starter is good and has been tested. I checked volts from starter post to ground on battery and got 12+ volts. I took the starter off several times and turned over the flywheel to get a new spot for the bendix because I thought maybe ring gear is worn out?

    Jack - Iowa    Posted 06-10-2020 at 13:59:09 [URL] [DELETE]        [Reply] [No Email]  
  • Re: 9n wont turn over
  • But was that starter repainted? You must have an electrical connection from the starter case to the grounded terminal on the battery. That is the second half of your circuit. May have to scrape/sand some paint off. Also check for dirt/grease on the mating surfaces. You could try a jumper cable from the grounded post to the starter case if you have a place where bare metal is showing.

    Tim Daley(MI)    Posted 06-10-2020 at 06:08:15 [URL] [DELETE]        [Reply] [No Email]  
  • Re: 9n wont turn over
  • HiYa Will-
    Verify your battery is good; don't assume just because you apply a charger it is good -have it tested at a trusty shop. Next, verify the entire wiring system is correct. Essential Manuals and Wiring Pictograms by JMOR are required reading if'N ya wanna be an N-Owner. Many 12V switch out jobs are done by 'shadetree mechanics' and wired incorrectly. There are but a few methods to switch over to 12V and a thousand incorrect ways to do so. The 9N starter motor is a 1-Wire Unit with NO solenoid. Is this what you have? next, the 9N (after s/n 12500) & 2N models used the roundcan cutout circuit with the generator. Is the cutout removed from the 12V circuit? It should be removed. Is the OEM Ballast Resistor in the circuit? It should be in the circuit. Does your new alternator have the correct fan belt AND a belt tensioner device installed? It should be? Is your coil the OEM 6V one? If so, you need to add an inline white ceramic 1-OHM resistor to the circuit. If your coil is 12V the extra resistor is not used. Are you running lights? If so, disconnect for now, you can hook the lights back up when you get all else right. Take the battery to your trusty shop and get it bench tested under load, and meanwhile use your VOM (NOT a test light)set to continuity and your Pictogram diagram to verify the entire electrical wiring system is correct. Don't assume wire colors are right, they seldom are OEM, and colors don't conduct electrons. take NO shortcuts or skip steps. Don't assume. Root cause problem solve.

    FORD 9N/2N WIRING 6V & 12V:


    FORD N-SERIES TRACTOR FRONT MOUNT DISTRIBUTOR 9N-12250 BALLAST RESISTOR:


    EXTERNAL IN-LINE 1-OHM CERAMIC RESISTOR – REQUIRED WITH THE FRONT MOUNT DISTRIBUTOR WHEN USING A 6-VOLT COIL:


    FORD 9N-10505-B CUTOUT –USED AFTER S/N 12,500 TO S/N 258504 ON 9N & 2N MODELS ONLY:


    *NOTE: Eliminate cutout along with the generator when doing a 12V switch over job.


    FORD 9N/2N TRACTOR ESSENTIAL OWNER/OPERATOR/PARTS/SERVICE MANUALS:

    Tim Daley(MI)

    http://www.ntractorclub.com/howtos/pdfs/JMORs-Wiring-Pictograms.pdf

    Bruce(OR)    Posted 06-09-2020 at 20:37:44 [URL] [DELETE]        [Reply] [No Email]  
  • Re: 9n wont turn over
  • Is the ground cable at the same spot as the meter was connected to? Usually a bolt as close to the starter, well cleaned and lightly greased, is the best option.

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