[Healeys] Electrics

[Bob Spidell]

This is a reasonable, perhaps the /only/ explanation, but it's possible 
the rotor damage was coincidental; I think a 'thrown bar' would have 
made a lot of racket.


On 11/27/2022 7:13 AM, josef-eckert--- via Healeys wrote:
>
> Hello Mike,
>
> I presume the points sticked together, causing the generater to 
> produce a high output voltage at the generastor D-Terminal, which 
> resulted in an extremely high current which welded the points 
> together. The generator got extremely hot (had to gave much more power 
> than it was designed for) and the bar broke out.
>
> Simple, but that´s to my opinion what happened.
>
> Josef Eckert
>
> Germany
>
> -----Original-Nachricht-----
>
> Betreff: [Healeys] Electrics
>
> Datum: 2022-11-27T02:52:14+0100
>
> Von: "Mike Sinclair" <phoenix722 at comcast.net>
>
> An: "Healey List" <healeys at autox.team.net>
>
> 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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