I am appreciative of our having a starter & alternator rebuilder in our local area. I had them rebuild both alternators for our 1973 Mach 1 and Mustang Convertible. Neither alternator was bad, but both we for the original vehicle, neither of which were highly options and were non-A/C cars. Thus, their original alternators were 42 or 43 amp units. I had installed a lot of additional electrical goodies on both Mustangs (
dual electric cooling fans, Classic Air Air Conditioning, DashCam, GPS with Backup Camera, Power Outlets on the full length console for 12 v sockets, and dual USB outlet, etc). When had all of the electrical circuits turned on in total they were pulling just over 40 amps, so at engine RPMs below 2,000 the alternator simly could not keep up. I had both rebuilt using a rotor with far more field windings, so the new output was well over 65 amps at 2,000 RPM, and more than 40 amps at idle. I would have rebuilt both myself, but I do not have a heavy duty soldering iron needed to properly and quickly handle the diode soldering.
With one of the rebuilds I did run into a problem. The brush holder also held the terminals for the Stator and Field Circuits (side terminal alternator for the Mach 1). When I first connected the rebuilt alternator I initially had intermittent output from the Alternator, then soon after no output (per a voltmeter I mount4d on the Center Console digital voltmeter). I did some testing and found the field circuit had to current traveling through it (0 amps), but the wiring to the alternator terminals was good.
I pulled the rebuilt alternator and found the spade terminal, held in place by the brush holder, was pushed down into the terminal slot portion of the brush holder, as opposed to locking in place when protruding. I took the alternator back and asked if I could get a new brush holder. The owner was really good about the situation, and suggested he just epoxy the spade terminal in its protruded position, which I was fine with. He pulled the sunken spade terminal out into its proper position, put a dab of epoxy on it, then bench tested the alternator.
I got back to our place and reinstalled the alternator. This time it ran perfectly, and has given no trouble since. That is the only time I have seen a brush holder for a side terminal alternator fail to lock a spade terminal into its protruded position. But, it was unusual enough to cause me to do a video on how I diagnosed the issue, then how it was corrected.
https://youtu.be/-ur-4TSZoRU
There is another video Lynda and I did showing how we reinstalled the locally rebuilt alternator into our 1973 Mustang Convertible. There are a lot of goodies in this video:
https://www.youtube.com/watch?v=Vm88glOT7LY