Posted by Brownie 450 on March 23, 2009 at 04:02:08 from (216.51.158.151):
In Reply to: Farmall M overcharging posted by Shawn in PA on March 20, 2009 at 21:40:03:
Just re-reading this whole thing---how much output is your alternator rated at? The amps rating is usually stamped on the case near the tightener hole. See if you can read this value. I always use an alternator rated 37 amps on tractor conversions--but are hard to find now. If your unit is a higher capacity unit, say 63 amps or more, & you are using the original meter, the meter would be reading maximum. Pulley size will affect output also, but not to that large a degree---our SMTA will charge off scale right after starting if not left at idle, but will taper back to less than 5 amps within 1 minute after a "normal" start. Getting back to this 7 amp discharge thing, try unhooking the wire at the coil as well as the Bat. terminal at the back of the alternator--then pull the ignition switch on & see what happens. If you don't have a hold-against ammeter--do you have a spare ammeter which you can use after disconnecting the coil & alternator we need to know where the 7 amp draw is getting away to. We have to isolate between the alt. & coil.
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