Ford Tractor Help Needed!

[Anonymous-0]

I have a Ford 600 with a side mount distributer. I have had two coils explode in the past 2 weeks.
I just bought the tractor and need some insight as to what might be the problem. It has a 12 volt battery in it. The first coil that blew was a 6 volt coil which is understandable. The second coil that blew was a 12 volt coil with an internal resister.
Thanks for any help you may give me!

 

[Brian Saylor]

There are a couple different values of internal resistors for 12v coils. That shouldn"t matter much if you are running at 12V. Assuming you are running 12V with a newer alternator, the problem may be the alternator has a bad regulator and you are charging MUCH higher voltage, 18-20V at high RPM. If this is the case, your headlights will be extra bright or just blown out. Check the voltage output from the alternator when you get your new coil put back in. If you are higher than 14V, then the regulator has shorted out.

 

[TMo]

Shooting from the hip here. Are your wires hooked up correctly corresponding to postive and negative? Negatives are all grounded? Wire from solenoid to ignition coil on correct post?

 

[Anonymous-0]

Both times were when charging the battery after it had run down, when I replaced the first coil the negitive wire went to the distributor, i replaced them exactally as i took them off, upom doing some research I find that this tractor should be a positive ground, it has the negitive cable going to ground (12 volt battery) all else seems to be 6 volt starter and generator managed to find a wireing diagram but it does not tell me which post to place the coil wires in regards to + or -. Am going to totally go through the wireing to see what I can discover. any and all help is helpful.

 

[Jerry/MT]

Make sure the electrical charging system is not causing the system voltage to get too high. I think you may have a failed/maladjusted voltage requlator thats allowing the too high a voltage which increases the primary current in the coil causing it to over heat.
I"ve haven"t seen t all but I"ve never seen one explode.

 

[Sean in PA]

Yes, that tractor had a 6 volt positive ground system from the factory, but most 12volt conversions also switch the system to negative ground. The starter will spin the proper direction with either positive or negative ground so all that you need to make sure of is that the battery polarity matches the way that the generator & voltage regulator are hooked up (or alternator if it's been converted from a genny).

If it's still got the original 6 volt generator then you need a 6 volt battery, or you need to replace the generator and voltage regulator with 12 volt versions (or an alternator if you like).

 

[TMo]

As mentioned, I think you might have polarities mixed and match +'s to -'s and visa versa. Make sure you have a complete 12 volt system or a complete 6 volt system. You also mentioned having to charge the battery twice after it went dead. Were you able to start and drive the tractor on a fully charge battery, then when you turned the tractor off, you could restart because battery was drained?

When you said "does not tell me which post to place the coil wires in regards to + or -." Wire from "I" post of solenoid to + post on ignition coil, wire from - post of ignition coil to ground.

 

[souNdguy]

you need to find out if your gen has been swapped for a 12v or rebuilt as 12v, since you have a 12v battery.

also read the fine print on the coil.. some say they are for use on 12v system with external resistance.. meaning you need to ADD a resistor.

i use napa IC14SB coils.. they run on 12v fine, no resistor needed.

also.. PS.. I really REALLy R-E-A-L-L-Y doubt you have a coil with an internal restive element. While I imagine you can get them from specialty or restoration supply houses.. most modern coils simply have the correct resistance built in to their primary based on wire diameter and number of turns of wire... no nasty restive element hiding in there taking up space.

post abck..

soundguy

 

[M-MAN]

Your wiring or switch is scr--ed up. That coil ain't going to explode without too much juice and it isn't supposed to have any on it at all when you are charging the battery. Turning the switch on powers the coil. Something is shorting out.