(800) 853-2651
SHOP NOW

Charging

K

KTNC

Member
I just replaced a battery on my M which is converted to 12V. It starts fine, but I am wondering should the voltage guage by light switch show that it is charging (point to right)when running? It does do that when I turn the lights on. When running with no lights, it remains in the middle... Is this right?

Thanks
 
With respect, that is an amp gauge measuring electrical flow, not pressure (voltage). if it is an alternator that is a perfect reading for a charged battery. When the battery is fully charged, the system's voltage regulator allows the charge rate to prevent over charging.
A generator system is less likely to do such a good job, but it is supposed to.
when running at 3/4 throttle it should read 14.2 volts measured across the battery. (a needle type meter is best for this reading) Jim
 
Is it a VOLT meter or an AMP meter?

What does the face of the gauge say?

Farmall M's came from the factory with an AMP meter, but that could have been changed to a VOLT meter.

An AMP meter would stay in the middle only if the tractor is off. When you turn on the ignition and/or lights with the engine off, the needle should move to the left. When you start the engine, the needle should move to the right.
 
It's an amp meter, looks like the original. When I turn on the lights with engine off, it goes to the right. Same place it goes when engine running and I turn the lights on. I'm thinking guage is hooked up wrong, maybe when it was converted to 12V..?? BTW should the guage still function the same as when it was on 6V? Battery is brand new...
 
The gauge will read the same whether it is used with six volts or twelve volts. Most likely when the tractor was switched to twelve volts it was also switched to negative ground instead of the original positive ground. If the wire on the back of the ammeter are not switched when the ground is switched the gauge will read backwards.
 
You must log in or register to reply here.

Similar threads

4
Farmall A charging questions
Replies
14
Views
569
gene bender
G
R
1954 Super H Still Not Charging
Replies
7
Views
273
BarnyardEngineering
BarnyardEngineering
Dillsburg 560D
  • Question
Farmall 656 shut down issues
Replies
2
Views
317
used red MN
U
M
Battery Charging Issue
Replies
8
Views
359
560Dennis
560Dennis
P
SUPER A CHARGING ?
Replies
4
Views
288
Pembroke
P
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