Posted by John T on November 09, 2011 at 05:17:56 from (173.243.181.15):
In Reply to: Battery Question posted by Doug Kieta on November 09, 2011 at 03:43:19:
"Several times I have read on this forum that when the battery is disconnected from the electricfal system the generator has to be repolarized" FWIW you havent read that from me!!!
NOT SO WEEDHOPPER
As a matter of fact, if your Cutout Relay or Voltage Regulator is working properly, which they usually are, each time the tractor is shut off the generator is disconnected from the battery. The cutout when open breaks/opens the circuit from the batterys hot ungrounded post via the ammeter to the genny because otherwise the battery would quickly back discharge via the gennys brushes and armature. The fact its (batteries) other grounded post is tied to some huge hunk of rusty iron (tractors frame) dont matter as (unless a short) there no current path
Soooooooo if what you quoted was true, you would have to repolarize the genny before each time you started the tractor back up, because the battery was effectively out of the electrical circuit after the tractro was shut down.
Soooooooooooo when do you need to polarize???
MOST IMPORTANT AND REQUIRED: If you changed battery polarity and BEFORE you start the tractor....... If the armature has been removed form the genny and its sat there a long time Id polarize it before starting just to be safe.......... If the genny has sat a long long time Id probably polarize it just to be safe......... When you buy a new VR it has instructions to polarize the genny but they do that to make sure you dont start it with a batetry at opposite polarity then the genny adn do harm to the new VR
If you just want to, its your tractor to do with as you please, re poalrization dont harm so go for it BUT ITS JUST NOT TRUE EACH TIME THE BATTERY IS DISCONNECTED YOU NEED TO RE POLARIZE THE GENNY. Whether or not it needs polarized has nuttin to do with if you removed or left intact a battery cable when you shut her down provided you re connect at same polarity
NUFF SAID, if I missed anything hope the other fine gents will add to this
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