What comes first, the charger or the batteries

[OS2Dude]

There is a repair kit for your alternator: https://www.yoyopart.com/oem/7959509...ic-105327.html They may be able to tell you more.

The manufacturer website does not list it anymore, as you likely know, but they have a few tech support numbers. Try them and see if they have any info on it. It has got to be a retrofit item, I've never heard of that brand and it is not what is on our 1985 C30 with an M-25.

I can't imagine someone would replace a 55 amp alt for a 4. Maybe it is just 'code' for 55?

[GordMay]

Originally Posted by a64pilot

Is your charger rather large and heavy and has a 60 hz hum when operating?
If so then I’d suspicion it’s an old dinosaur like mine was, a monstrous heavy transformer that had only one voltage output, no three stage charging. It worked sort of, but nowhere near as good as a modern three stage charger...

Exactly.
The Charles 9000 Series is a (40A max) self-regulating ferroresonant transformer type charger, for flooded lead-acid (FLA) batteries only.