Subject: Re: DC charging system question
Author: Jtomel-@aol.com
Date: Feb 3, 2003, 12:18 PM
Post ID: 1711866144
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Fred, I'm not too computer literate. I bought a scanner with another
computer and plan on giving it to my daughter in WY. Maybe I should break
down and buy and learn!
You need to know the defference in the method of polarizing an
INTERNAL-ground gen. and an EXTERNAL-ground gen. To determine which system
you are dealing with look at the brush holder that is connected to ground.
An internally grounded gen. will also have ONE of the field leads connected
to it; an ext. grounded gen. will have no other wire connected to the
grounded terminal. With an INTERNAL ground (such as the generators used on
Guzzis) you polarize by DISCONNECTING the FIELD lead and MOMENTARILY touching
it to the BAT terminal on the regulator. With an EXTERNAL ground you just
momentarily connect a jumper wire from the BAT to the GEN or ARM terminals of
the regulator.
I have seen manuy situations where everything else looks okay, but the
generator was not working, and that was remedied by re-polarizing. Folks
take the generator apart to replace brushes and after reassembling, fail to
re-polarize. Do it by the book, and avoid simple problems!
Sorry I don't have a scanner
Tom
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<HTML><FONT FACE=arial,helvetica><FONT SIZE=2 FAMILY="SANSSERIF" FACE="Arial" LANG="0">Fred, I'm not too computer literate. I bought a scanner with another computer and plan on giving it to my daughter in WY. Maybe I should break down and buy and learn! <BR>
You need to know the defference in the method of polarizing an INTERNAL-ground gen. and an EXTERNAL-ground gen. To determine which system you are dealing with look at the brush holder that is connected to ground. An internally grounded gen. will also have ONE of the field leads connected to it; an ext. grounded gen. will have no other wire connected to the grounded terminal. With an INTERNAL ground (such as the generators used on Guzzis) you polarize by DISCONNECTING the FIELD lead and MOMENTARILY touching it to the BAT terminal on the regulator. With an EXTERNAL ground you just momentarily connect a jumper wire from the BAT to the GEN or ARM terminals of the regulator.<BR>
I have seen manuy situations where everything else looks okay, but the generator was not working, and that was remedied by re-polarizing. Folks take the generator apart to replace brushes and after reassembling, fail to re-polarize. Do it by the book, and avoid simple problems! <BR>
Sorry I don't have a scanner<BR>
Tom</FONT>
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