Author Topic: 1931 355A charging system  (Read 113 times)

Offline Thomas B.

  • Posts: 43
  • Name: Thomas Brown
1931 355A charging system
« on: October 05, 2017, 09:14:24 AM »
I have had the generator rebuilt, new cut out switch, it is putting out 7.2 - 8.2 volts at the field and on the battery side of the cut out switch.  When I hook the wire coming from the vehicle to the battery side of the cut out switch, I can not get any more than 6.2 volts to the battery.  The battery is fully charged.  Any ideas???  Thomas B.

Offline m-mman

  • Posts: 338
    • CLC Member
      CLC Member #29634
  • Name: Jim Crabtree
Re: 1931 355A charging system
« Reply #1 on: October 06, 2017, 10:04:31 PM »
If original, the charging rate is adjusted by moving the third brush inside the generator. It is a very crude design (adequate for the times)
Not sure I understand your connections. Are you testing with the battery connected? or with the generator running "free'?

If you search "3 brush generator adjustment" you will find a lot of information about dealing with them posted on many other boards for others makes. (back then everybody used 3 brush systems)

The best thing is to just install the hidden solid state electronic regulator.
« Last Edit: October 06, 2017, 10:17:55 PM by m-mman »
1929 341B Town Sedan
1971 Miller-Meteor Lifeliner ambulance
Other non-Cadillac cars
Near Los Angeles, California

CLC #29634