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Subject: NAA Starting issues

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Dan J    Posted 06-28-2020 at 19:41:04 [URL] [DELETE]        [Reply] [Email]  
  • NAA Starting issues
  • I have a question for everyone. I have a 54 NAA, when I try to start with the starter button it will crank over but not fire up. If I pull the tractor with a truck and chain it will start and run like a top. If it dies on me it won't start again without pull starting. I'm not sure why it is doing this. Any help would be much appreciated. Thanks for any info.

    Jack - Iowa    Posted 07-01-2020 at 14:59:11 [URL] [DELETE]        [Reply] [Email]  
  • Re: NAA Starting issues
  • Bruce mentioned it but do not ignore the dragging starter. Those starters were/are equipped with a bushing on the brush end. Not unusual for the bushing to wear out and drop the armature on the fields. Back in the day you could purchase a end plate complete which made for an easy fix.

    Bob in KS    Posted 06-29-2020 at 08:12:19 [URL] [DELETE]        [Reply] [Email]  
  • Re: NAA Starting issues
  • 6 volt or 12 volt conversion?

    If it is a 12 volt conversion with an added resistor between the switch and coil try jumping across the resistor.

    Some 12 volt conversion kits are supplied with a resistor with too high an ohms value.

    If resistance between + and - on coil is about 1 1/2 ohms it should have a resistor of same approximate value.

    If 3 ohms across coil do not use a resistor

    Tim Daley(MI)    Posted 06-29-2020 at 06:01:53 [URL] [DELETE]        [Reply] [No Email]  
  • Re: NAA Starting issues
  • Likely root cause is a weak or dead battery as Bruce said. I suggest you take your battery to your trusty starter/alternator shop (auto parts store in a pinch) and have it bench tested under load with their test equipment. Do you have a fan belt tensioning device on your generator or alternator? The battery is the heart of any machine and must meet specific gravity levels to sustain a full charge under load. A clicking solenoid and/or non-cranking engine is a sure sign the battery is dead. Simply connecting a trickle charger won't charge a dead battery. The constant discharging and recharging of a battery will deplete its life span quickly. Bargain house units have a reputation of only giving 2 years or less of life so invest in a good brand (INTERSTATE, DEKA, DURACELL/East Penn, EXIDE) GP1 6V AG or GP25 or GP 35 12V battery. The best investment you can make to ensure a long battery lifespan is to buy and use a float charger. NOTE: A basic battery charger is not a 'float charger'. Simply charging a battery does NOT mean it is good. It must maintain a full charge under load, meet the specific gravity specs by testing with an hydrometer or bench tester at a shop. When the vehicle is idle, i.e not running, you keep the float charger connected so it will maintain a full charge and it is 100% ready to go when you need it. Keep it connected if tractor is idle for 10 days or more. I just keep mine on every time when idle and use the DELATRN BATTERY TENDER units –reliable and guaranteed. Your local trusty starter/alternator/generator shop guy can bench test the battery, generator or alternator, ammeter, voltage regulator or cutout, ignition switch, and starter motor. Scheduled periodic preventative maintenance is the key. Check wiring and fan belt tension often. If your generator or alternator does not have a belt tensioning bracket, it will never keep the belt tight and thus will not keep the battery charged. Whether 6V/POS GRN or 12V/NEG GRN, dead battery and/or mucked up wiring are #1 causes of non-starting issues. Your OEM NAA Owner's Manual, 39-53 MPC, and the I&T FO-19 Manual have the wiring diagrams. See JMOR's Wiring Pictograms for more including 12V wiring. Finally, if you need a jump start, you can use your truck battery and jumper cables with the starter motor -no need to pull the tractor in tow. Make sure you know how to connect cables for the 6V and the 12V system.



    FORD TRACTOR 1939-1953 MPC:


    Tim Daley(MI)

    Bruce(VA)    Posted 06-28-2020 at 20:16:59 [URL] [DELETE]        [Reply] [Email]  
  • Re: NAA Starting issues
  • probably because you do not have enough voltage to turn the starter and get you a spark.

    That is likely caused by:

    1. A weak battery (charge it & check it per tip # 49. Or get it load

    2. Dirty grounds/connections (remove the cables & clean the connections)

    3. Bad cables or incorrect sized cables (replace them - see tip # 41)**

    4. Bad ground between the starter & the block. (pull the starter away from the block & clean the mating area - see tip # 36)

    5. A dragging starter ( do a voltage drop test)

    ** You can't see corrosion under the insulation.

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