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Mike
Sometimes a new dynamo needs remagnetizing. It relies on residual
magnetism to start giving out electrical power, All it needs is to
disconnect the field connection ( F Smaller connection) and with a jumper,
lead connect 12 v from the battery to the F terminal. Just about 5 seconds
is sufficient. Reconnect the original connection and see if the red light
has gone out
On Sun, 27 Nov 2022 at 01:47, Mike Sinclair <phoenix722@comcast.net> wrote:
> Need some enlightenment. Awhile back, the car (BJ8) was running fine, but
> I noticed the little red light that says the battery isn't being charged
> was on. (I do keep the battery on a Battery Minder" when not in use.)
> Chased the system down, and discovered the generator was putting out zero
> volts. Adjusted the fan belt, no change. On closer inspection, the rotor
> was damaged (a bar was actually missing). Had the unit rebuilt, and it is
> working fine, but still had the little red light wouldn't go out. Checked
> all the connections, continuity, voltage regulator, couldn't find any thing
> out of the ordinary. Finally, upon closer inspection of the regulator with
> a mirror, found the contacts on one of the coils were welded together, and
> the leaf spring holding that contact was completely severed. According to
> the manual, this is the "cutoff coil". New regulator solved the problem.
>
> Now the questions.
>
> 1. What could cause the rotor to be damaged?
>
> 2. What could cause the points to weld together?
>
> 3. Which likely failed first? Did one cause the other?
>
> 4. I'm guessing the points stuck together first, and caused the leaf
> spring to break, so first the points were always "closed", and then always
> "open".
>
> 5. Would any of this cause damage to anything else, e.g., the battery?
>
> Again, everything seems normal, now. Battery holds charge well.
>
> Mike
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<div dir=3D"ltr">Mike<div><br></div><div>Sometimes a new dynamo needs remag=
netizing. It relies=C2=A0on residual magnetism=C2=A0to start giving out ele=
ctrical=C2=A0power, All it needs is to disconnect=C2=A0the field connection=
( F=C2=A0 Smaller connection) and with a jumper, lead connect 12 v from th=
e battery to the F terminal. Just about 5 seconds is sufficient. Reconnect =
the original connection and see if the red light has gone out</div></div><b=
r><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Sun, =
27 Nov 2022 at 01:47, Mike Sinclair <<a href=3D"mailto:phoenix722@comcas=
t.net">phoenix722@comcast.net</a>> wrote:<br></div><blockquote class=3D"=
gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(20=
4,204,204);padding-left:1ex">
=20
=20
=20
<div bgcolor=3D"#ffffff">
<p><font face=3D"Tahoma">Need some enlightenment.=C2=A0 Awhile back, th=
e
car (BJ8) was running fine, but I noticed the little red light
that says the battery isn't being charged was on.=C2=A0 (I do k=
eep
the battery on a Battery Minder" when not in use.)=C2=A0 Chase=
d the
system down, and discovered the generator was putting out zero
volts.=C2=A0 Adjusted the fan belt, no change.=C2=A0 On closer insp=
ection,
the rotor was damaged (a bar was actually missing).=C2=A0 Had the
unit rebuilt, and it is working fine, but still had the little
red light wouldn't go out.=C2=A0 Checked all the connections,
continuity, voltage regulator, couldn't find any thing out of
the ordinary.=C2=A0 Finally, upon closer inspection of the regulato=
r
with a mirror, found the contacts on one of the coils were
welded together, and the leaf spring holding that contact was
completely severed.=C2=A0 According to the manual, this is the
"cutoff coil".=C2=A0 New regulator solved the problem.</f=
ont></p>
<p><font face=3D"Tahoma">Now the questions.</font></p>
<p><font face=3D"Tahoma">1. What could cause the rotor to be damaged?</=
font></p>
<p><font face=3D"Tahoma">2. What could cause the points to weld
together?</font></p>
<p><font face=3D"Tahoma">3. Which likely failed first?=C2=A0 Did one ca=
use
the other?<br>
</font></p>
<p><font face=3D"Tahoma">4. I'm guessing the points stuck together
first, and caused the leaf spring to break, so first the points
were always "closed", and then always "open".</=
font></p>
<p><font face=3D"Tahoma">5. Would any of this cause damage to anything
else, e.g., the battery?</font></p>
<p><font face=3D"Tahoma">Again, everything seems normal, now.=C2=A0 Bat=
tery
holds charge well.<br>
</font></p>
<p><font face=3D"Tahoma">Mike</font><br>
</p>
</div>
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</blockquote></div>
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