300 INT TRACTOR ALTERNATOR

i got my starter back on. she starts from the new switch. i have some sparking on couple brushes on my alternator im not sure how to hook it up. on the two wired connector they have wired those two wires together and hooked them to the coil. on the outside of the alternator there's a lug that i hooked to the amp meter but that didnt work. it seemed as though i got feedback immediately when i hooked the battery up so i have posted photos so maybe i can get some comments. Delco reemy alternator. thanks

The black wire on the BAT output post should be wired directly to the + battery source, either through the amp meter, or to the starter solenoid battery post.

The red wire should loop over to the same BAT post.

The white wire should connect to the ignition side of the ignition switch, but there must be a diode, indicator light, or a resistor in the line.
Alt Wiring

the red and white wires are connected together so are you saying i need to separate them then wire them up. Thanks

Yes, move the red to the BAT post, olong with the battery wire. The white isfed by the ignition circuit through the diode or lamp or resistor.

Yes, that is what he is saying, rewire per the diagram. If under that tape on the white wire you find a diode then it could be wired nearly correctly. It does ..work.. to have the number 2 white wire ..voltage sense.. connected as it is there but generally it just loops over to the Bat terminal on the back as shown in Steves diagram. If there is no diode under there your alternator is not charging or the blue wire on the Bat terminal is not connected to the battery properly. If that was all working your engine would keep running when you shut off the key. That is the purpose of the diode to allow power from the ignition to energize the excite circuit in the internal regulator. But the diode does not let the voltage the alternator is producing to feed back the opposite way to the ignition coil when you turn off the key. A charging alternator with no diode will keep the engine running when the ignition is turned off. And once the engine is stopped by some other means the alternator will be sending voltage out of that terminal which will cause the battery to go dead over time. You must be watching very close to see sparking at the brushes. They are covered fair well. Could be a sign that they are worn, easily replaced says he who has had probably 50 or more of those alternators apart for repair.

i think i understand now, thanks

I just noticed the close paired black wires that come over the top of the alternator. I believe you mention them on your post on this in the IH board. Do they just go to a bolt that holds the two halves of the alternator together? If so remove them the were likely a ground on whatever the alternator originally came off of. As far as you saying you have ..feed back.. are you connecting the battery with the NEGATIVE post counting to the chassis and the POSITIVE post to the starter? The tractor needs to be negative ground now, with an alternator it can no longer be ran in the original positive ground configuration. Follow Steves linked diagram right down to battery polarity. Hooking the battery up as positive ground will almost immediately burn out the diodes in the alternator. The feedback you got on the IH forum was missing some details in both cases, again I will echo follow the diagram provided here.