(800) 853-2651
SHOP NOW

6 V Autolite Generator output ????

Crazy Horse

Crazy Horse

Well-known Member
I have a Massey Harris 101 Junior with an Autolite 6 V 3rd brush generator. Just lately, it seems to be charging at a much higher amperage rate than before. With the 3 position light switch in position #1 (low charge), the charge rate approaches 20 amps when in operating RPM range. It drops off to about 3-4 amps at slow idle in this #1 position. When in the #2 (high charge) position, it pins the needle past the top 20-amp mark on the ammeter. When in #3 (high charge with the lights on)it drops back down a bit but still approaches 20 amps of charge. Seems to me this is a bit high. The 3rd brush is adjusted into the lowest amperage output position in its rotation.

Here is my question ..... does this seem to be somewhat high for amp output? And can my battery be damaged by this rate of charge?
 
I would check it to see if you really are getting that high of a charge out of it. Your ammeter maybe bad. You can use a known good ammeter or a good charging system tester.
 
That much constant output may damage both generator and battery. Check to make sure the 3rd brush lead is not shorting to the "Hot" armature brush lead. It sounds like you may be getting full generator voltage to the field coils.
 
Another idea is a shorted field winding. If internally shorted it acts like a much lower voltage device. This means it will draw much more amps through the field and make way more output. Jim
 
Check to be sure the third brush hasn't moved closer to the adjacent brush. Moving it further away should reduce the charge rate.
 
A poor ground can make a 3 brush run wild.You better take some voltage readings and hydrometer readings.Steady overcharge can boil a battery dry.12 alternators can blow the caps off a battery and bulge the case.Most drivers cant read an ammeter or voltmeter.
 
You must log in or register to reply here.

Similar threads

F
Voltage regulator question
Replies
12
Views
521
JMOR
J
S
424d Generator and VR test and question
2
Replies
34
Views
613
Janicholson
Janicholson
C
'53 Farmall Super H generator dead and gone?
Replies
6
Views
356
used red MN
U
F
There any Hobart experts out there?
Replies
10
Views
567
Fritz Maurer
F
D
Repairing glow plug/starter switch wiring farmall 504
Replies
18
Views
486
BarnyardEngineering
BarnyardEngineering
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