Old, we are working with 12v Stewart Warner resistance gauge movements & senders. They are not polarity sensitive, there is no positive or negative. Makes no difference if the tractor is wired pos or neg ground.
The gauge movement is grounded to the gauge board, the gaugeboard to the sheet metal completing the power coil circuit to the tractor frame. That provides a constant magnetic flux at the power coil pole.
The sender coil is grounded at the threads on the temp sender and the flange screws on the gas sender completing the sender coil circuit. The senders are varible resistors so the current in the sender coil and thus the magnetic field strength at the sender coil pole varies to move the pointer pole one way or the other.
All you need to do is have a switched 12v power source to the power terminal (right) and the sender connected to the sender terminal (left). Make sure the gaugeboard, gas sender flange, and temp sender threads are well grounded to the tractor frame.
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. [ About Us ]
Today's Featured Article - Usin Your Implements: Bucket Loader - by Curtis Von Fange. Introduction: Dad was raised during the depression years of the thirties. As a kid he worked part time on a farm in Kansas doing many of the manual chores. Some of the more successful farmers of that day had a new time saving device called a tractor. It increased the farm productivity and, in general, made life easier because more work could be done with this 'mechanical beast'. My dad dreamed that some day he would have his own tractor with every implement he could get. When he rea
... [Read Article]
Latest Ad:
2022 John Deere 5045E, 4wd, front end loader and 3rd function with grapple. 120 hrs, 55k new, must sell
[More Ads]
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.
