Sounds like some sticking brushes to me! I have 3 operating one-wire
alternators and None of them have the fluctuating charging characteristics
you've indicated. I guess that maybe your running at a slower idle speed
then me? You could have some grease that moved from the support bearing up
to the brushes that's causing the problem or some weak tension springs and
short brushes causing the problem. A resistance test would tell you the
condition of the brushes. I guess the only way to really know what's going
on would be to test the voltage and amp's with it on the truck and then
remove it and substitute a stock voltage regulator in place of the one wire
to see if the regulator is the problem. I guess what you could do is just
jump a wire over from the bat terminal on the alternator to the #2 terminal
to see if the problem goes away "which takes away the self energize
function".
Joe
-----Original Message-----
From: Gary L Perry <glperry@fwi.com>
To: oletrucks <oletrucks@autox.team.net>; old-chevy-truck@yahoogroups.com
<old-chevy-truck@yahoogroups.com>
Date: Wednesday, April 25, 2001 1:00 AM
Subject: [oletrucks] Alternator flashing
>I have a 54 with a one-wire alternator on it. It's been on 2 years. It's
not
>new 'cept the regulator for the one-wire set-up. Last winter and now that
I'm
>driving again it started to pulsate like the lights and ammeter gauge
needle
>wiggles as it does this. It always charges OK. I have to "blip" the
throttle
>to start it charging which is normal for these. It's real bad when cold and
>first starting, then gets slower as it warms and drives awhile. It goes
faster
>as I accelerate till it looks like it's steady at speed. What may cause
this?
>Is it time for new alt? Regulator bad? Would it be better to hook up the
othr
>two connectors to power that I haven't even used? It used to run steady
w/out
>pulsing when I first put in truck, don't know why different now. Opinions
>wanted.....
>
>G. L. Perry
>Huntington, IN 46750
>50 Chevy COE (project)
>55 GMC COE (project)
>54 Chevy 2-ton (driver)
>MM Jet Star 3 (tractor)
>oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
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