(800) 853-2651
SHOP NOW

TO-20 Converted to 12-Volt - Dumb Question...

T

Tom Bowman

Member
This will vividly illustrate my lack of knowledge about tractor electrical systems, but here goes.

My TO-20 had previously been converted to 12-volt, negative ground, with what I think is a one-wire alternator. (It only has one wire running to it, anyway.)

I won't be changing any of the electrical stuff, but I've had the battery, alternator, starter, etc. all unhooked for a long time.

I've read about polarizing a [i:3328af1cd9]generator[/i:3328af1cd9], but do I have to polarize an [i:3328af1cd9]alternator[/i:3328af1cd9]?
 
No, you do not need to do anything but start it up. Alternators
are self exciting and to the correct polarity. If you have not
changed over to a 12volt coil you will need a resistor to bring
the voltage down to 6volts though.
 
No, but you may have to "rev" the motor up pretty fast to get that one-wire alternator to start charging. Some of the one-wires are built to self-excite at a relatively slow speed - some are not. Either way, once it starts charging, both will charge at slow motor speeds.
 
Thanks, Tom and Hills.

Just to clarify, I didn't do the 12-volt conversion; it had already been done when I bought the tractor at auction a couple of years ago.

I don't know what the voltage of the coil is, but the tractor started and ran fine, and the battery charged.

Should I be able to find markings on the coil? (It looks pretty old.)
 
You must log in or register to reply here.

Similar threads

A
Ted-20 12 volt battery type
Replies
6
Views
225
Charles in Aus.
Charles in Aus.
P
300 u 6 volt gen to 12 volt alternator condition question
Replies
8
Views
437
Paul 300 U
P
P
300 u 6 to 12 v conversion update problem
2
Replies
28
Views
912
Paul 300 U
P
V
1955 Ferguson TO-35 Gas wiring diagram
Replies
4
Views
936
Bruce(OR)
B
A
case vac-14 12 volt conversion
Replies
8
Views
361
AdamC3825
A
Tractor Parts Tractor Manuals

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.

Copyright © 1997-2024 Yesterday's Tractor Co.

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.

Yesterday's Tractors - Antique Tractor Headquarters
Website Accessibility Policy

Back
Top