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Name that Voltage Regulator

 
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Dan Olson



Joined: 31 Jan 2015
Posts: 2

PostPosted: Sun Feb 01, 2015 3:37 pm    Post subject: Name that Voltage Regulator Reply with quote

I got a momentary spike of voltage (needle pegged for about two seconds) the other day while taxing to do my run-up. I checked my alternator (ALY-8520R) wiring and found that F1 was grounded to the starter, and F2 was connected to the field output of the regulator. No shorts or opens, but the wiring was in poor shape. I re-wired the alternator with F1 to field output on VR, and F2 grounded on alternator case (does it even matter which way F1/F2 are wired?). Wiring on the VR is also in poor shape (cracked insulators). I will probably replace with the B&C LR3C-14, but it's about four times the size of my current regulator! In the meantime until I find a place to mount the B&C, I'd like to replace the existing regulator as a quick fix, but can't find a match. No part numbers or markings other than "12V" and "Nov 1984".

Anybody see one of these before?

-Dan
Glasair RG


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nuckolls.bob(at)aeroelect
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PostPosted: Mon Feb 02, 2015 5:48 am    Post subject: Name that Voltage Regulator Reply with quote

At 17:37 2015-02-01, you wrote:
Quote:


I got a momentary spike of voltage (needle pegged for about two
seconds) the other day while taxing to do my run-up. I checked my
alternator (ALY-8520R) wiring and found that F1 was grounded to the
starter, and F2 was connected to the field output of the
regulator. No shorts or opens, but the wiring was in poor shape. I
re-wired the alternator with F1 to field output on VR, and F2
grounded on alternator case (does it even matter which way F1/F2 are wired?).

No . . .

Quote:
Wiring on the VR is also in poor shape (cracked insulators). I
will probably replace with the B&C LR3C-14, but it's about four
times the size of my current regulator! In the meantime until I
find a place to mount the B&C, I'd like to replace the existing
regulator as a quick fix, but can't find a match. No part numbers
or markings other than "12V" and "Nov 1984".

Go to a car-parts store and get a
generic replacement for a 1980's
Ford. If it looks like this

http://tinyurl.com/nfwuxtl

it will work no matter what brand/
part number. Should be able to pick one
up locally for $20 or so . . .

Tie "A" and "S" leads together and route to
your alternator switch. Take the F lead
to the alternator. Ground the case. Leave
the "I" lead open.

See

http://tinyurl.com/ku2nb5t

for exemplar wiring. This will get you by
until the better alternative becomes
more attractive.
Bob . . .


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