[urq] alternator whine puzzle (X post) long

[brozmotorz]

hi,

before inestigating further, I think I'd try two things first :

_ check alignement with a true straightedge (the one for the cylinder 
heads), not eyeballing, it may "look" ok but not be
if alignement is off, belt tension may not change anything to the noise

if that is ok :

_ remove brushes/regulator and plug the wires off (isolate them !) and run 
the engine, this would confirm/infirm the "electrical load theory" but I 
never heard/read that.

hth

pierre



> Guys-
> Based on my tests so far - I'm starting to think this (John Koenigs
> response just below) may have some merit here.  I loosened the belt
> further over the weekend and it made no real difference that I could
> tell.  I would think a looser belt would make the sound go away some if
> it were alignment - as the stress would decrease.
>
> So lets talk about charging.
>
> My battery cable, which originally went straight to the alternator, with
> a "branch" to the starter, is now different because the alternator is on
> the other side and the battery cable will not reach.  The battery cable,
> BTW, is from a 200 20V.  So now the battery cable exits the frame rail
> and goes to the starter directly and a new, longer, "branch" goes over
> to the alternator.  According to my gauge, I'm seeing about 12.3V at
> night with lights on, about 12.9 to 13V during daytime.  Remember I've
> tried 3 separate alternators and the output has been consistent too.
> Any input on the charging wiring aspect that I should check? Is there a
> way to add a secondary ground strap?  Is the alternator working overtime
> hence the whine?  What would cause this?  Voltage Reg? Wiring? Anything?
> Anyone anyone?  Bueller bueller.
>
> Thanks again
>
> Brandon