Posted by Janicholson on January 10, 2011 at 07:10:49 from (199.17.6.126):
In Reply to: Jump starting M-- Help posted by Buck Clayton on January 09, 2011 at 19:21:39:
I agree with John T. The first thing is to see if the Running tractor is still operational. With all jumpers disconnected, and the tractor running, turn on the lights. If the amp gauge needle flickers and then stays in the middle, it is probably OK. If it goes to discharge, it probably needs to be repaired. Check running voltage across the battery it should be about 14.2 to 14.6 volts. Battery voltage is about 12.6 or so, if this is the reading, the alt will need analysis.
The second question is if the tractor with no battery also had an alternator and is 12 volt. If it did, and it was also negative ground, (probable) you were doing things that if just to see if it would start would be OK but risky. An alternator system needs a battery in all cases to control voltage. If you had gotten it started and disconnected the SM, it could have toasted components on the LPM.
Always assume the need for an installed battery in an electrical system.
If it was a 6v generator based LPM, (assuming the battery leads were isolated from touching ground on the LPM) and if the LPM was magneto equipped, the tactics used would have been better if the jumper was used to touch the starter input on the LPM, and not the starter switch lead. Jim
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