Welcome! Please use the navigational links on your left to explore our website.

Company Logo Shop Now
   Allis Chalmers Case Farmall IH Ford 8N,9N,2N Ford
   Ferguson John Deere Massey Ferguson Minn. Moline Oliver
 
Marketplace
Classified Ads
Photo Ads
Tractor Parts

Community
Discussion Forums
Project Journals
Tractor Town
Your Stories
Show & Pull Guide
Events Calendar
Hauling Schedule

Galleries
Tractor Photos
Implement Photos
Vintage Photos
Help Identify
Parts & Pieces
Stuck & Troubled
Vintage Ads
Community Album
Photo Ad Archives

Research & Info
Articles
Tractor Registry
Tip of the Day
Safety Cartoons
Tractor Values
Serial Numbers
Tune-Up Guide
Paint Codes
List Prices
Production Nbrs
Tune-Up Specs
Torque Values
3-Point Specs
Glossary

Miscellaneous
Tractor Games
Just For Kids
Virtual Show
Museum Guide
Memorial Page
Feedback Form

Yesterday's Tractors Facebook Page

Related Sites
Tractor Shed
TractorLinks.com
Ford 8N/9N Club
Today's Tractors
Garden Tractors
Kountry Life
  
Farmall & IHC Tractors Discussion Forum
:

Installing volt gauge on magneto tractor

Welcome Guest, Log in or Register
Author  [Modern View]
farmall pete

05-14-2019 05:04:54




Report to Moderator

Anyone done it? Got an H with magneto ignition converted to 12v one wire alternator. Ammeter went bad & I have a spare voltmeter laying around. Scratching my head trying to figure out how it could be wired with the existing magneto kill switch.




[Log in to Reply]   [No Email]
Bob M

05-14-2019 08:11:51




Report to Moderator
 Re: Installing volt gauge on magneto tractor in reply to farmall pete, 05-14-2019 05:04:54  
Possible easier solution: Wire the voltmeter direct to the starter "hot" post so it reads constantly, even when the engine is shut down.

Many (most?) voltmeters draw only a few milliamps of current - less than the internal leakage current of the battery and thus can be connected all the time.

Using an accurate VOM, measure the resistance across your voltmeter terminals. If it's more than about 2,000 ohms, you can safely leave the voltmeter connected constantly for MONTHS without appreciably draining the battery.

This is how the voltmeter is wired on my old Kenworth 10 wheeler. It can sit unstarted 6 months yet will start right up when I need it.

[Log in to Reply]  [No Email]
farmall pete

05-14-2019 07:25:19




Report to Moderator
 Re: Installing volt gauge on magneto tractor in reply to farmall pete, 05-14-2019 05:04:54  
[quote="CVPost-Bob"](quoted from post at 11:08:40 05/14/19) Install a two terminal normally-open oil pressure switch and feed the power to the Voltmeter through it.

Now that is an elegant solution! Thinking outside the box. Thank you.



[Log in to Reply]  [No Email]
Bob

05-14-2019 07:08:40




Report to Moderator
 Re: Installing volt gauge on magneto tractor in reply to farmall pete, 05-14-2019 05:04:54  
Install a two terminal normally-open oil pressure switch and feed the power to the Voltmeter through it.

Or a relay powered by one of the alternator stator leads.



[Log in to Reply]  [No Email]
farmall pete

05-14-2019 05:45:09




Report to Moderator
 Re: Installing volt gauge on magneto tractor in reply to farmall pete, 05-14-2019 05:04:54  
Yes I am aware of how a magneto works. I know I can buy a new ammeter. Not interested in cobbling up another switch. Thought there may be an elegant way to do it. I have gotten pretty good at disassembling and repairing old ammeters. Guess I ll take this one apart and fix it.



[Log in to Reply]  [No Email]
bass

05-14-2019 05:42:50




Report to Moderator
 Re: Installing volt gauge on magneto tractor in reply to farmall pete, 05-14-2019 05:04:54  
one on my M has a mag. the key is the switch.... I used a double point, double throw, normally off



[Log in to Reply]  [No Email]
John T

05-14-2019 05:27:32




Report to Moderator
 Re: Installing volt gauge on magneto tractor in reply to farmall pete, 05-14-2019 05:04:54  
Of course it has nothing to do with the magneto and basically wires across the battery to measure its voltage WELL DUH YOU SAY LOL. If you're thinking about some sort of a basic On Off switch so its connected ONLY when you run the tractor and you want to tie it into a Mag kill switch that's possible. Some sort of a double pole double throw toggle or push switch can be rigged so when ON the mag isn't grounded and the circuit from volt meter to battery is in place,,,,,,,,, but when OFF the mag is grounded out and the voltmeter is disconnected.

John T

[Log in to Reply]  [No Email]
rustyfarmall

05-14-2019 05:16:59




Report to Moderator
 Re: Installing volt gauge on magneto tractor in reply to farmall pete, 05-14-2019 05:04:54  
The magneto is completely separate from the charging system. Do not even attempt to connect the 2.
A new ampmeter can be purchased at most any auto parts store and it will fit where the original was. Price should be very reasonable.



[Log in to Reply]  [No Email]
[Options]  [Printer Friendly]  [Posting Help]  [Return to Forum]   [Log in to Reply]

Hop to:


TRACTOR PARTS TRACTOR MANUALS
Fast Shipping!  Most of our stocked parts ship within 24 hours (M-Th). We have the parts you need to repair your tractor - the right parts. Our fast shipping, low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]

Home  |  Forums


Copyright © 1997-2019 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