Posted by rasman57 on January 06, 2011 at 19:27:28 from (67.142.167.21):
So you guys have never steered me wrong on the wizardry required to deal with the electrons....looking for advice on how to troubleshoot this. I get a new gas gauge for my 69 Case 580 12 volt negative ground with an keyed ignition. The tank sending unit has a single wire in the center and the ground wire mounted to the frame. The new gas gauge ordered from the Case dealer has 3 terminals; one marked S (sender?) one marked I (ignition?) and a G (ground).
So, being a product of a public school, I connect the wire from the sending unit to S, a wire from the ignition terminal of the switch to I. and ground wire to the G. Turn the key and bingo it pegs the gauge past full.....problem is that the tank is only 1/4 to 1/2 full. No instructions or diagram so I am convinced it is so simple as the gauge is already marked but maybe not.
The sending unit with float looks good but I do not know how to determine if it actually works. I assume the float mechanism acts on a metal strip creating a varied resistance out the sole wire which in turn would be reflected in the voltage through the gauge? Is there a method to test the sending unit? I also tried hooking up a small 6 volt battery to the gas gauge thinking reduced voltage would perhaps only show 1/2 full? Wrong.... it still pegged past full with 6 volts? So now I have exhausted my "sparkie" abilities and hope you can explain how this style of gauge actually works in theory and how to test a sending unit. Then I can do some troubleshooting I hope.
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 - A Cautionary Tale - by Ian Minshull. In the early 1950s my father bought an Allis Chalmers B and I used it for all the row crop work with the mangolds and potatoes, rolling and the haymaking on our farm. The farm and the Allis were sold and I have spent a lifetime working on farms throughout the country. I promised myself that one day I would own an Allis. That time event
... [Read Article]
Latest Ad:
1964 I-H 140 tractor with cultivators and sidedresser. Starts and runs good. Asking 2650. CALL RON AT 502-319-1952
[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.
