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phil(va)
07-29-2005 10:52:11
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Re: TO30 ignition switch in reply to KevinK(NY), 07-29-2005 05:48:14
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Kevin, there are two switches required to start the tractor, assuming your tractor is like it was orignally, i.e, stock. One is the key switch on the dash. The other is on top of the bellhousing (where the flywheel and clutch reside). It will have two bolts on top, separated by a non metallic barrier. One bolt will have a large cable from the battery (negative post if stock six volt system) and the other will have a cable going to the post on top of the starter. This lower switch is operated by a rod which is pushed by the gear shift lever. This system is easily troubleshooted with a volt and ohm meter. For example, you should have full resistence (1.0 ohms or better) across the two terminals on this switch when you do not have the gear lever pushed forward as to start the tractor. But check it while someone holds the gear lever in full start position and you should have no resistence (zero ohms). You can use the meter to check your battery, which should have about 6.2 - 6.4 volts across the two battery terminals when the tractor is not running. If your problem might be in the key switch that is easily tested with a meter also, as it will have full resistence when off and no resistence when on. Or just use a jumper wire to jump around the two terminals and bypass the switch and see if that helps it start. These tractors should turn over the engine, however, even if this switch is bad. I am assuming from your post that your tractor engine does not even turn over, and if so, your key switch isn't your problem. Another thing that will keep it from turning over is a bad starter. This is fairly easy to test. Drive a 12 volt car up close and get some jumper cables. Make d... sure your tractor is OUT OF GEAR. Block a wheel if necessary. Attach the cables to your car battery. Attach one end of one cable to the top post on the starter. Just touch the other end onto a good ground on the tractor, like a bolt out of the side of the flywheel, etc. The tractor will turn over fast, if the starter is good. If you turn on the key, it should start. It doesn't matter which cable goes onto the starter post, as the starter doesn't care about polarity. However, DO NOT hook up to the tractor battery or any other part of the tractor system, or you could damage the ignition, coil, points, etc. Just go straight to the starter. As you can see, this puts full voltage directly on the starter, and you will know right away that it is the problem if it doesn't respond to that. Long post. Sorry. Hope it helps.
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