Im no alternator expert but if its similar to the Delco 10 SI family of internally regulated alternators heres what No 1 and No 2 terminals are for:
Of course, frame ground the case with the big main output stud wiring to the ammeter/battery:
SMALL SPADE TERMINALS 1 & 2
#1 Thats the external connection used to excite the alternator until such time (and RPM) that it becomes self excited....
That needs to be wired to a voltage source that becomes hot when the ignition switch is switched ON. So, where are such sources.
a) Well the IGN output of the ignition switch is a good source,,,,,,,,,,,
b) The same point electrically is where the wire down from the IGN switch wires to the high input (NOT to distributor) terminal on the ignition coil on non ballast resistor systems,,,,,,,,,,,
c) The same point electrically is where the wire down from the IGN switch wires to the high input (NOT to coil) side of a ballast resistor on ballasted systems
Soooooooo take your pick and wire the small No 1 terminal to any of the three locations listed above.
HOWEVER: It may happen that the tractor will still run after you turn off the ignition (alternator backfeeds coil) Sooooooooooo you fix that by installing a 10 ohm current limiting resistor in the wire from the source to the alternators No 1 terminal
ORRRRRRRRRRRRR some install a 3 to 5 amp 50 PIV or more diode in the line from the source to No 1 on the alternator (wire cathode band end towards alternator)
ORRRRRRRRRRRRR some install a small incandescent "idiot light" in that same line which prevents backfeed, limits current, and provides an indication of charging
# 2 Thats the voltage sensing terminal used to measure battery voltage so the regulation circuit can do its job. Many gents simply jump wire from No 1 up to the big main voltage output stud since thats "nearly" the same voltage as on the battery.
SUMMARY you can excite a GM 10 SI family of alternators by feeding off the input (NOT to coil) side of an external ballast resistor. However Id add a series 10 ohm resistor or a diode in that wiring to prevent backfeeding the ignition coil. Id wire the No 2 terminal to the big main output stud
IF THATS NOT THE ALTERNATOR YOU HAVE (GM 10 SI family) OR I MISSED ANYTHING HOPEFULLY THE OTHER FINE GENTS CAN ADD TO THIS
We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]
Today's Featured Article - Box Plow Blues - by Tom Schwarz. One of the first implements most tractor owners obtain is the box plow. For very little money, this piece of equipment promises to plow and flatten any hill or vale on your ranch road or farm. At least that's what I thought! As simple as a box plow appears, it can be rather challenging to make work correctly. In our sandy soils of Florida, traction is king. You can never have wide enough tires or heavy enough weights to get all the traction you want … unless you own a monster tractor. U
... [Read Article]
Latest Ad:
Oliver 550 Diesel runs like a watch three point hitch pto engine gone threw about two hundred hours ago nice clean tractor
[More Ads]
All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy
TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.
