I would measure the voltage at the coil input side when points are closed so current is flowing through the coil, and compare that voltage with battery voltage. If over .2 volts difference you have too much drop through wiring, ign switch, ammeter etc. Then I would measure battery voltage while starter is cranking the engine, if below very min of 4.5 volts you have poor battery, or low battery, or if battery is good, too much current draw from starter. A battery load tester can very easily give you a good accurate estimate of how much current starter is drawing. You read battery voltage while starter is cranking engine, then you load the battery with load tester to that same voltage and read the ammeter on load tester and that will be a very good indication of starter draw. Now, how much it should draw, well, that is where the interpetation of gauge readings come into play as temp, oil viscosity, compression, all come into play. Often times, just taking a starter apart on them old girls and lubricating the bushings well help immensely. The biggest single item in a starter that causes excessive current draw is lube and bushing conditions.When you hit that starter, those magnetic fields are drawing that armature toward the side of field that is opposite polarity at that time so and it is moving away from other field winding on other side. That distance causes a reduction in magnetic forces against armature winding. If it moves enough to drag you really have problems. Rarely will you find shorted field windings or armature leakage. Good clean contact of brushs on commutator with good spring pressure and good internal connections is the usual repair along with good tight but free bushings.
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 - Tractor Profile: Allis-Chalmers Model G - by Staff. The first Allis-Chalmers Model G was produced in 1948 in Gasden, Alabama, and was designed for vegetable gardeners, small farms and landscape businesses. It is a small compact tractor that came with a complete line of implements especially tailored for its unique design. It featured a rear-mounted Continental N62 four-cylinder engine with a 2-3/8 x 3-1/2 inch bore and stroke. The rear-mounted engine provided traction for the rear wheels while at the same time gave the tractor operator a gre
... [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]
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.
