For The 50D Alternator Experts

[RickB]

Clifford we had that problem with our old 4905 and it was the regulator when they switched it out they replaced the old one with a new updated model that had no adjustment screw. It was a cheap fix (relatively) and it worked great. The mechanic said that the old adjustable style were nothing but trouble. Funny thing is I think it quit on us in Kingman. Small world.

Rick

[Lee Bradley]

Sounds like your alternator is full fielding all the time. Try disconnecting all the field leads and check the output if it is still 32 volts you probably have an internal wiring problem. With no current to the field there should be zero magnetic field and zero output. Check the voltage at the field terminal with all the leads disconnected expect the main battery terminal; you should have zero voltage. If you have battery voltage, you probably have cross connection inside the alternator supplying battery voltage to the field. 

[gus]

Be very careful grounding stuff. The manual says to never ground something which I can't remember after working on it a few months ago when mine was doing weird things.

I think it was the field but don't hold me to that!

[pvcces]

Cliff, upon thinking about the results of our testing of that unit, I think that the regulator is not grounded and the regulator is passing full field current to the generator. I don't think that I have ever seen one do that, before.

I'm sorry that I didn't think of that while we we there.

For what it's worth.

Tom Caffrey

[luvrbus]

OT how did the Jakes work Tom

good luck

[gus]

My 4107 voltage reg has an added ground wire to the chassis that is not original, so maybe this is a problem?

[pvcces]

OT Jakes work GOOD, Cliff.

Thanks.

Tom Caffrey

[Ed Hackenbruch]

Clifford, did you get it fixed?