Need some ideas on how to hook up an alternator-2

Rod

• rewire alt.

At 6 volt I was faced with finding a way to excit alternator, without diodes or resistor lights. Remember quick was the order of the day, not experimenting to see what lights or diodes would work. I hooked battery to main terminal of alternator. He also gave me one of those pigtails that plug into side terminals. I hooked one wire to main terminal and the other I left as a jump wire I could touch on frame to excit alternator. It worked great.

A few days later when I had a bit more time, I made this more perminent. Since the SA had an extra wire in harness, I hooked it to my jump wire, drilled a hole on dash for a push button type switch and grounded the open side. Now all I have to do when I start tractor is hit that push button switch and system is charging. I watch the amp gauge as I do this, thus I know what is happening. Amp gauges don't show a charge very long after starting a SA that fires up quick. That was almost 13 years ago and the system has worked perfect ever since. No fooling around with those damn diodes or lights. I have since converted 130 and 140 to 12 volt alternators and used the same type push button for exciting alternators. I had a light and diodes on 130 for awhile and something was always not working. I soon said the He## with that.

An interesting note, quite often these start charging on their own without pushing button even at idle. 140 about 90% of time, SA about 50% and 130 about 20%. I wouldn't fool with being fancy, most of these old girls need warmup time anyhow, you may as well have something to do during that time.

Yes I do like some of what you speak of particularly those smaller alternators. I think along those lines old and I come from the same school, "You don't throw it out until it serves no usefull function, and you certainly don't change for the sake of change alone." I will gladly listen to anyone, but you better be prepared to give me a 15 year absolute guarentee on alternator ideas. I did have my first tractor job in 1948. You don't sell this old bird any pie in the sky unproven ideas.

Thankyou, but I will stick with push buttons for exciting alternators on my tractors. Don't talk to this old bird on modern vehicle electrical systems.

Remember to loop the #2 over to the charge stud.

Soundguy

Soundguy

have fun

Soundguy

If you go to the local parts store, NAPA, or wherever, tell them you want a fuel pump switch. This is a low oil pressure cutoff switch for the fuel pump. The switch itself will be a 3 prong job. One terminal is for the normal oil pressure switch (idiot light circuit), which is normally open under pressure (ground for no oil pressure, light comes on). The other 2 terminals are normally closed under pressure, which can supply power to a fuel pump, or in this case, the alternator. Just run a power wire from a terminal block or power source (alternator BAT terminal), through this pressure switch, and then up to the alternator. I guess it wouldn't hurt to stick an inline fuse in there, but I don't. There's no need for resistors or any of that crap, just a straight power feed to excite the alt. I can't see any other way to accomplish this *neatly* without installing a switch, unless there is some sort of ignition/instrument switch that can be wired into. The last pressure switch I got for that job cost about 10 bucks at NAPA. HTH.

Rod

John T

John T

As long as you're sending him to Bob M's diagram site, why not send him to diagram # 10? Ignore the magneto, and it's perfect for the job!

• Bob M's wonderfuldiagrams