28Q29U Plymouth Forum

General Category => General Discussion => Topic started by: frankp on October 08, 2015, 12:52:14 PM

Title: Generator not generating
Post by: frankp on October 08, 2015, 12:52:14 PM
Last weekend my generator quit, according to dash ammeter.  After doing research, I decided it was the generator and not the relay (cut-out.)  Changed the relay to my used spare, still no charge.  Decided this was beyond my capabilities and tools.  No meter to read up 20a.  Took it to a shop on Tuesday and the generator ok, but relay bad.  He suggested replacing eltromagnet/points with a diode.  Done.  I'm now getting a constant 12a output, cold or hot.  Will see how this performs on the road.  In the process, I installed a new ground cable battery to frame.  Cleaned all terminals in charging system.  They were a little oxidized.  Yesterday, I cleaned all connections on the CLUM and brake switch.  I should probably do the same for all the lamp fixtures.  Too bad I can't get into the CLUM.  Now to get to my pesky carb, again.
Title: Re: Generator not generating
Post by: imoore on October 09, 2015, 03:12:11 AM
So did you remove the cutout relay completely or put a diode in series with the relay.
I had trouble a while back where the gen decided to not regulate. Ended up being melted solders on the commutator. At the time it had one of those electronic voltage regulators. So I chucked that in the bin and went back to the third brush set up. All has been fine since.
Title: Re: Generator not generating
Post by: frankp on October 09, 2015, 09:27:40 AM
Too bad your generator fried.  Were you able to identify the cause?  Glad that you are in good shape now.

The relay, from the outside, looks stock.  Under the cover is the diode with the winding and points completely removed.  The current value is still set by the position of the third brush.  I was not told of any modifications within the generator.  I understood there were none.
Title: Re: Generator not generating
Post by: 29UJohn on November 16, 2015, 10:49:50 PM
When I installed a diode in my generator it worked well for a while but eventually burned out.  I contacted James Peterson and he advise me to use a voltage regulator with the diode.  After I did that, no problems.  James makes the voltage regulators and installs diodes in the cutout box.