The first step is to buy a voltmeter. I bought one at Harbor Freight for $4.00 last week. The next step is to go to the Restoration forum where CNKS has just posted a wiring diagam for the 706.
1) Hook the voltmeter across the brightened terminals of the battery(not the cables, but the terminals) 2)Crank the tractor and read the voltage. It must not drop below 10 and1/2 volts. If it doesn't charge battery and try again. If it fails again replace battery.
Assuming negative ground: Put positive lead of meter on center of positive battery terminal and negative lead on solenoid terminal where battery terminal attaches. 1)While cranking the voltage lost between the battery should be 1/2 volt or less. If not replace with quality cable.
Now place the positive lead of meter on a brightened spot of starter case and the negative lead on the center of the negative battery terminal. While CRANKING the voltage must not drop below 1/2 volt If it does clean the metal between starter and block and clean the battery cable both where it attaches to the block and the negative terminal of the battery. If it fails again replace with a quality cable. While doing these tests unhook the coil primary so the engine doesn't start. Another test is to hook the positive terminal of the meter to the big battery terminal of the solenoid and the big starter terminal of the solenoid and you will have 12 volts at rest, but should have less than 1/2 while cranking. If not replace the solenoid.
Now we are ready for the control circuit where I expect your problem lies since it cranked while bypassing the control circuit. The light switch is not involved according to the diagram. 1) Put the positive lead of the meter on the little S terminal of the solenoid which is hooked to the push button switch. Hook the other lead of the meter to ground and turn the key on and push the switch and you must read 10 volts or more. If you don't you need to keep backing upstream with the positive lead of the meter until you find good voltage while cranking. Where the voltage is lost is your problem.
For a quick test when the tractor is hot and won't crank do this: 1) Hook the meter across the center of the battery terminals and it must read 12 volts then try to crank and it must read over 10 and 1/2 volts. This verifies it is not the battery. Now take a jumper wire you have taken with you with alligator clips on it and being sure the tractor is in PARK clip one end of the wire to the positive terminal of the battery and the other end to the little S terminal of the Solenoid. If it now cranks you don't need to worry about the earlier cable tests as you have bypassed the push button switch, the key switch and their inherent wiring.
My e-mail is jdluvr@swbell.net and my phone # is 918 627 3317. Let me know where you found the problem.
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.
