Use a Multimeter to test the electrical system. Most digital meters will display a (-) sign in front of the voltage reading if you have the polarity backwards. (The red lead is positive, the black is negative) Jump start the tractor, set the meter up to read 12 volts dc, usually the 20 volt setting on most meters. Place the leads on the battery, red to positive, black to negative. A 6 volt system should read around 7.5 to 8.5 volts if the charging system is working. Be careful starting or running a 6 volt system with 12 volts. The coil is designed for a 6 volt battery and will produce more voltage than the points can handle. (The resistance of the 6 volt coil is 1/2 that of a replacement 12 volt coil, so the voltage will be double.) If the tractor is charging properly, your problem could be as simple as corroded connections or a weak battery. It could also be that you need to rebuild the starter, which is not very difficult.
|