Disconnecting the battery cable while running it not a good way to check an alternator. Doing so will damage the alternator and if you where to get in line with the cable you take off and ground it can KILL you. Disconnecting it like that makes the VR got to max charge and max volts so it is putting out 35 plus amp which is 35 million time the amps it take to kill and max volts can be 90 plus which is more then enough to push the amp to kill you. Just plain and simple a stupid way to do it.
Correct way to check is a volt meter check and a magnet test. Battery volts should read 12.5 plus not running and 13015 volts running. Magnet test is simple also the back of the alternator center should be magnetic when running if not then it is not being excited as need to work
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Today's Featured Article - What Oil Should I Use? - by Francis Robinson. I keep seein this question pop up over and over again in discussion groups all over the web. As with many things there are often several right answers and a few wrong ones. Some purist I'm sure will disagree to no end with what I will tell you but most of us out here in the real world don't really care do we ? Some of them only bring their noses down out of the air long enough to look down them anyway. If you are like me you are only doing this old tractor stuff because you enjoy it. You
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