Late IIA six cyl charging issue

Hello,

I have a 1970 IIa with AC Delco 63 amp altenator upgrade. It was
working fine till last night. I've been hearing a sound from the firewall
area resembling a intermittent scraping. I believe there is a relay
that regulated charging in there somewhere that has gone bad. I'm
pretty sure it's not the voltage regulator that is screwed to the firewall?

Anyone have a similar problem? Fixes? Ideas?...before I go rplacing parts.

I can run the car of the battery till the charge drops to low..i.e. the battery
is not being charged and the altenator works.

cheers.:confused:

Well, I'm pretty sure the alternator has it's own internal regulator. Which means that there should be no relay or anything in the circuit. (Some of the older alternators do have external regulators, but you wouldn't want to use one of those.) Not sure what the scraping sound would be, but you should have at least 14 volts at the battery with the engine running if the alternator is working.

You should probably just pull the alternator and take it to an auto parts place and let them check it.

I did pull the Alternator and had it checked...works fine. I believe that the
problem is that the brushes are sticking when it gets hot.
I had this problem before with my FJ60.

I'm going to look for a replacment ALT or new brush kit....
AC Delco Alternator Model SI-10. Anyone know where I can get
replacement parts for these? Or would it be better to just get a whole
new one?

Thanks.

Better off to exchange it for another. Not worth the rebuilding effort, and they shouldn't be that expensive. My 2 cents.

The 10si is internally regulated and easy to rebuild. I would check with your local alt. shop. unless you are way out in the boonies somewhere.. I have all the parts that U will need if you can't find them locally, let me know if I can help..............Donnie

I ended up going down the hill to my local Alternator shop...

Alternators Unlimited. 1464 San Pablo Ave, Berkeley, CA 94702 Map, +1 510.527.7773 ...I highly recommend these guys!

They sold me a new regulator and brushes for 12.00.
I replaced the parts and it works like a charm now.


Thanks everyone.