(800) 853-2651
SHOP NOW

farmall A generator putting out 13.7V + ground

M

major257

New User
My farmall generator is putting out 13.7V pos ground at idle and 19 or so at operating rpm.

It is a magneto ignition so there is no coil.

There is a burned out 6v regulator on it and a 6v battery in it.

I really don"t care whether it is 6v, 12v, pos or neg I just need to know where to start so it will charge. It starts fine with the 6v pos ground battery but all the info I read say that a 6v generator puts out around 10v.

So any help would be great.

Thanks

Matt
 
If that battery has 3 cells its a 6 volt battery.
If it is a 6 volt system you need to have your generator and regulator checked at your local repair shop that does alternators, starters & generators. If the battery has 6 cells its a 12 volt battery, but charging at 13.7 & 19 volts is too much for your battery. For a 6 volt system it should be charging around 7.25 volts & 14.5 on a 12 volt system. Hal
 
Matt - Most likely replacing the 6 volt regulator will have your tractor charging again.

Reason: If the "burned out" regulator has failed open on in cutout circuit (a common VR failure) the generator is now operating open circuited. And open-circuited, a healthy 6 volt generator can develop 12+ volts at idle and 20 - 25 volts at governed RPM.

You might try this: With a known good battery connected and and the engine operating at governed RPM temporarily jumper the GEN and BAT terminals at the VR. If the ammeter shows a strong charge (10 - 15 amps) when the terminals are jumpered a new VR will solve your problem.
 
I'm with Bob. Don't be deceived, those generators will put out big voltage. The job of the VR is to control how much voltage is sent back to the battery. If you're measuring the voltage being sent back to the battery and getting those readings, it's likely that the VR is baked.
CC
 
You must log in or register to reply here.

Similar threads

F
Ford 600 Tractor Electrical
Replies
7
Views
703
FordFarm600
F
J
1953 Farmall Super C with a 2-wire distributor.
Replies
5
Views
193
Joe Kimbriel
J
M
SWD9 battery ground
Replies
7
Views
335
John T
J
K
Farmall 300 6v generator, with a 12v system and battery
2
Replies
29
Views
885
Kevinjd1981
K
F
Voltage regulator question
Replies
12
Views
554
JMOR
J
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