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LUCAS ALTERNATOR AUTOPSY

angelfj1

Yoda
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I fried my <span style="text-decoration: underline"><span style="font-weight: bold">15AC</span></span> Alternator driving up to the Glen last Thursday. This adventure is chronicled elsewhere. This morning I swapped out the bad unit with a spare from a parts car and I now have plenty of amps (well maybe 28 amps which is not too much by todays standards).
I pulled apart the bad unit and found two broken wires (leads) connecting the diodes to the stator winding. I would not have guessed that this was a mechanical failure but it was. All six bridge diodes and all three blocking diodes checked out to spec. When I have a chance I'll repair this bridge assembly and then I'll have a spare for the spare. :smile:
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Interesting, one of our club members had to replace the alternator in his TR4 on Sunday. Never heard the verdict, but the replacement unit was good.
 
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