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Posted by . on June 24, 2008, 3:06 pm
> I see there is another post from "." about testing the reg/rect itself
> with battery which would help point the finger at that part if it is bad.
No, I was talking about manually exciting the rotor field by applying
battery
voltage across the B and F terminals.
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Posted by paul c on June 24, 2008, 3:46 pm
. wrote:
>
>> I see there is another post from "." about testing the reg/rect itself
>> with battery which would help point the finger at that part if it is bad.
>
> No, I was talking about manually exciting the rotor field by applying
> battery
> voltage across the B and F terminals.
Oh sorry, I guess you are talking about testing the rotor and stator in
isolation?
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Posted by . on June 24, 2008, 12:25 am
> So, what is best -- replace the rectifier/regulator first and if that
> doesn't solve the problem go ahead and replace the rotor too? Or the othe=
r
> way around?
How about checking the alternator brushes before buying parts you
might not need?
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Posted by Phluge on June 24, 2008, 10:19 am
> So, what is best -- replace the rectifier/regulator first and if that
> doesn't solve the problem go ahead and replace the rotor too? Or the other
> way around?
How about checking the alternator brushes before buying parts you
might not need?
OK, that will be the next thing I will do. Thanks,
pflu
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Posted by . on June 24, 2008, 10:53 am
> How about checking the alternator brushes before buying parts you
> might not need?
>
> OK, that will be the next thing I will do. Thanks,
If the brushes are OK, you can probably disconnect the field leads
from voltage regulator and excite the rotor field with 12 volts DC
direct from the battery and see if that raises the output voltage
while the engine is running.
The voltage regulating function of that type of regulator is just a
transistor which is
turned ON when the ignition key is ON, and then it turns OFF when
battery voltage rises above 14.5 volts.
We discussed CB650 alternators EXTENSIVELY in this group about two or
three years ago, and, AIR, the field leads are the black and white
wires. One CB650 rider e-mailed me images of the pages from his Clymer
or Chiltons manual, but I deleted them already.
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