Re: How to diagnose bad resistor?

Posted by Phil Auten (TX) on March 22, 2001 at 12:32:53 from (64.217.53.118):

In Reply to: How to diagnose bad resistor? posted by Lisa on March 22, 2001 at 11:24:38:

Lisa,
One thing, sometimes the starter drive, or Bendix, will jam in the flywheel and not allow the tractor to start. Remove the bolts holding the starter to the tractor and jiggle the starter around a bit. Replace the bolts and give it a try. If it works, you just saved a bunch of time and maybe money.

The resistor shouldn't have anything to do with the starter. The resistor drops the 12V down so it won't burn out the 6V coil.

If the starter just hums when you push the button, there's a problem somewhere between the battery post and the terminal on the starter motor. Check the voltage at the battery terminal without doing anything. It should be about 13.6V if the battery is fully charged and good. If it is 12V or a bit more, try charging the battery. If that doesen't help, the battery is likely bad.
If the battery checks out, check voltages down the line at the switch and the starter terminal. If there is a drastic drop in voltage, while cranking, on the starter side of any connection, the component on the battery side of this connection is bad. Don't overlook the cables and their connections. Bad connections will not only cause starting problems, but charging problems too.
If the starter is getting at least 10V while cranking and doesen't spin, have it checked at a shop. They can be rebuilt fairly inexpensively.
You might want to ask around to see if one shop keeps being recommended and then use that one.

Hope this helps,
Phil

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