rebuilding an alt
Before opening it up start with the basic checks for the field circuit being grounded or open, and the output terminal (stud) isn't grounded. Then do field current draw test on the bench.
Ignore the mess. Grounded field alternator.
On your isolated field alternator its almost the same hook up.
1. Connect the field terminal to the battery negative (unlike the photo yours is not and should not be grounded).
2. Set the multimeter for 10 or 15 Amps. For this meter pictured it means plugging one of the leads into the 15 amp position and turning the dial. Connect the one lead from the meter to the second field terminal.
3. Connect the other lead of the the multimeter to the battery's positive.
Try to turn the pulley while the reading the current. (you should feelk some resistance) Disconnect. Done.
Compare the field current measured to the spec for the alternator.
If you didn't have a second meter reading the voltage while testing, best you can do is check the battery voltage after. As long as its over 12 volts its close enough.
The holders and brushes for all but the revised squareback alternators shown here:
Alternator repair, a little show and tell.
Two on-line companies I've used for new parts:
https://www.aspwholesale.com/index.php?route=product/category&path=71_152
Quick Start: Alternator Exploded Views & National Quick Start Sales, High output alternator, Alternator & Starter Parts
Alternator repair, a little show and tell.
Before opening it up start with the basic checks for the field circuit being grounded or open, and the output terminal (stud) isn't grounded. Then do field current draw test on the bench.
Ignore the mess. Grounded field alternator.
On your isolated field alternator its almost the same hook up.
1. Connect the field terminal to the battery negative (unlike the photo yours is not and should not be grounded).
2. Set the multimeter for 10 or 15 Amps. For this meter pictured it means plugging one of the leads into the 15 amp position and turning the dial. Connect the one lead from the meter to the second field terminal.
3. Connect the other lead of the the multimeter to the battery's positive.
Try to turn the pulley while the reading the current. (you should feelk some resistance) Disconnect. Done.
Compare the field current measured to the spec for the alternator.
If you didn't have a second meter reading the voltage while testing, best you can do is check the battery voltage after. As long as its over 12 volts its close enough.
The holders and brushes for all but the revised squareback alternators shown here:
Alternator repair, a little show and tell.
Two on-line companies I've used for new parts:
https://www.aspwholesale.com/index.php?route=product/category&path=71_152
Quick Start: Alternator Exploded Views & National Quick Start Sales, High output alternator, Alternator & Starter Parts
Alternator repair, a little show and tell.