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M38 Voltage regulator problems
Posted: Wed Jun 09, 2010 5:35 pm
by lucianom38a1
Fellows,
My M38's 24V generator regulator just died... I'm having problems to find another one in good conditions here in Brazil.
So if some colleague knows about where I can find a good one to buy, please let me know!.
Thanks!
Luciano
Posted: Thu Jun 10, 2010 8:11 am
by wesk
Hello Luciano,
Which regulator did you have? Mechanical (Auto-Lite, Prestolite, Delco), or Transistorized ( Vap Air / Motorola )? The mechanicals are easily repaired and there is slowly surfacing some data and parts info to support repair of the others.

Auto-Lite (Prestolite) Mechanical
Delco Mechanical

Vap Air Transistorized
Posted: Thu Jun 10, 2010 1:43 pm
by jeepers52
Hello Wesk,
What usually goes wrong with the mechanical ones, and who should we trust to fix them?
Thank you
Posted: Thu Jun 10, 2010 3:02 pm
by wesk
Trust yourself and follow the Manual TM 9-1825B dated 1952 for Auto-Lite/Prestolite and TM 9-8627 Dated 1953 for Delco. The most common problem is dirty and sticking contacts. You clean and dress those contact points the same way you do ignition points. A very fine metal point file and a quality electric contact cleaner.