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Charging questions

A

Anonymous-0

Well-known Member
I have an International 424 that I converted from generator to a 2 wire GM alternator. When I 1st installed it, it was charging at about 14.5 volts. Now about 4 weeks later it is charging at 18 volts. Any ideas why? Should I return this one for a new one?
My other tractor a Ford 1900 (I find that the IH guys are more willing to share advice than the Ford guys) which has an alternator and voltage regultor was charging at 17.5 volts. I replaced the voltage regulator and now it is at 15.5 volts, is this a normal voltage? Thanks for any advice. Joe
 
By 2 wire, I assume you have connected the #2 terminal to the output post (Big terminal) this sensor wire controls the voltage output at the alternator. If it is connected well, I suspect the regulator inside the alternator to be out of spec.
Typical voltage at the battery terminals at 1/2 throttle with the battery charged is 14.2 to 14.6 volts. If you operate a system much higher than 14.6 (maybe as much as 15) it will reduce the life of the battery. The exception would be short run times and cold weather. In which case the drain on the battery would compensate for high charge rates.
Before replacing parts, clean all connections to the battery and ignition to Alt and bat to alt wires. Special look at the #2 terminal to output post is warranted. Good luck, JimN
 
You may also want to check to see if the alternator and bracket is grounded to the tractor. Some Pontiacs had a problem like this and they added a small ground wire from the bolthole at the back of the alternator to the engine block. You can test it with a jumper wire with alligator clips. Just make sure it is a very short bolt if you end up installing a ground wire.
 
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