What does the voltage on the battery read when you place the + lead of the meter to the + terminal on the battery, and the - terminal on the meter to the - terminal on the battery.
Unless you do that and find out what condition the battery is in, you can't make any decisions on what to do next.
I don't get it though... Didn't you look at the BATTERY when you hooked up the charger? My battery wires are all black so I am forced to look on the battery for the little + and - signs molded into the case. Even when there's a red and a black I don't trust it. I always look at the battery case for the marks.
If the battery shows above +10V, then unhook it from the tractor and charge it with a real battery charger.
The alternator is probably fried from being hooked up backwards.
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Today's Featured Article - New Life for an Old Allis - by Tyler Woods. My friend Jon, has an old '39 Allis Chalmers B. He thought it a marginal tractor that had long since served its time. She smoked terribly and never had much power but he couldn't afford another so he was limping along with what he had. Jon's Allis has a small front loader and though it doesn't carry much, it serves his needs. It was the hard starting and low power that made him think it was time to replace the old girl. Jon called me to help him discover why his tractor wouldn't start
... [Read Article]
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