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914World.com _ 914World Garage _ Learn by asking ? What is this part?

Posted by: bandjoey Sep 22 2021, 07:20 PM

This is an old 914 non working alternator. Clay said I could change out the diode from a good working spare alternator. So I tore into this non working one to edumacate myself.

What part plays the diode(s)? 1. or 2. or neither?

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Posted by: jrmdir Sep 22 2021, 07:57 PM

This may help: https://www.thesamba.com/vw/forum/viewtopic.php?t=706007&sid=4fbffebc6247465f770a2e3d2c61ece7

Ron

Posted by: fixer34 Sep 22 2021, 08:53 PM

Number 2 is the diode, #1 is the connection to the alternator brushes which provide the AC voltage/current. The diodes on the curved plate rectify the AC to DC 12 volts. That curved plate is 'hot' (12v) so it must be insulated from the alternator body.

Posted by: bandjoey Sep 22 2021, 09:29 PM

Thanks Ron. That explained a lot.