Ford 9N, 2N & 8N Discussion Board |
Re: Bench Testing a 9N coil
[ Expand ] [ View Replies ] [ Add a Reply ] [ Return to Forum ]
Posted by souNdguy on June 26, 2006 at 11:35:22 from (12.65.192.81):
In Reply to: Bench Testing a 9N coil posted by Chuck Gibson on June 26, 2006 at 09:30:00:
These is no easy shadetree mechanic coil test.. unless you have a real ignition anylizer.. or other specialized equipment for testing a coil.. like . I think.. Bob on the N forum does. In any case.. you can do a few basic tests, and make a few assumptions based on that after watching it in operation. First.. test for pimary continuity... Use ohm meter on lowers setting and test between top post and the pigtail contact on the bottom. Depending on the sophistication and calibration of your ohm meter.. you may read anywhere from 1/2 to 2 ohms.. ( also depending on if you are testing a 6v coil.. or 12v coil ). Ohm meters are just not real accurate. Now.. if it measures anywhere close.. the primary at least has continuity.. though some windings may be shorted... etc. Test secondary.. from top post to flat spring contact.. should be using the kohm scale.. Should read somewhere in the 4-8k range. Best way to diagnose these is to get good points set at .015, and install it ont he tractor.. run a hot wire right to the coil top and check spark by bumping tractor over in neutral. many spark problems are dirty connections and bad switches.. lastly.. bad coils.. etc. T do a cheapy non scientific test on the condensor, take the lead on the condensor and touch it to its case.. now.. set ohm meter on lowest scale. and put leads across the condensor case and lead. Watch the scale on the meter... ( analog is best ).. It will swing from a low resistance to a high resistance ( as the cap charges.. and will show infinite or so.. when it is fully charged. ) Your tractor itself will be the easiest diagnostic tool to test that coil.. short of some specialized bench equipment. Soundguy
Replies:
Home
| Forums
Today's Featured Article -
History of the Nuffield Tractor - by Anthony West. The Nuffield tractor story started in early 1945. The British government still reeling from the effects of the war on the economy, approached the Nuffield organization to see if they would design and build an "ALL NEW" British built wheeled tractor, suitable for both British and world farming.
... [Read Article]
Latest Ad:
Oliver 550 Diesel runs like a watch three point hitch pto engine gone threw about two hundred hours ago nice clean tractor
[More Ads]
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 HeadquartersWebsite Accessibility Policy |
|