Subject: RE: replacement voltage regulator
Author: Jason Telford
Date: Jul 19, 2004, 12:28 PM
Post ID: 1717185897
derek bird wrote:
according to many sources one of the tips books gives part numbers for a replacement voltage regulator available at your local neighborhood napa store. could someone please provide a part#, model #, to ask for. tia |
It depends on whether you have a Bosch or a Marelli generator. Here's
what I have copied off the list from various times for Bosch, I believe.
I'm sorry, I do not know who the original posters are. It's somewhat
disjointed because it came from a couple different threads.
J
The theory applies but not the part numbers. Your 73
has a BOSCH (many early Ambo's had
Marelli's)Generator, very similar to early VW's - in
fact my eldo uses a VW generator. You can safely use
any early VW Regulator, I usually buy one for a '72 VW
beetle, 1600cc - just 'cause that's what I used to
drive. Those systems are generally quite robust and
more powerful than the early alternators. Yes, Tonti
saved about 8 lbs with the alternator, but I'm hard
pressed to appreciate teh weight savings when I'm push
starting a 500 lb bike!
There is a $14 fix, the same fix I used for the sailboat charging
systems.
Remove the original Bosch voltage regulator. Place it on the floor, and
smash it flat with a 2 pound hammer, then wrap it in a used dirty
Pampers,
and stuff it deep in the garbage can (if you come up with a worse fate,
have
at it, that piece of junk deserves it!)
Buy a Dodge car voltage regulator. The NAPA part #is UR32SB, but shop a
bit,
because you can pay $40 for the same item. There are only two to chose
from, one is flat, the other isn't, you want the one that isn't flat.
It
has three connections; one on each end, and a ground screw on the side -
one
end to the alternator(marked "field"), the other to the hot lead from
the
ignition, and the third to ground. The Bosch regulator had the same
three
wires, so its an easy swap. It fits in place of the original nicely, is
easy to find if you ever mess up one, and is cheap. It will produce
exactly
14.2 volts. The Bosch units I have checked put out about 13.6 volts,
resulting in a partially charged battery. Death by slow sulfation.
Eppa Wimbish wrote:
| Buy a Dodge car voltage regulator. The NAPA part #is UR32SB, but shop a bit, because you can pay $40 for the same item. |
The regulator is for a 1969 Dodge Monaco (among others). Wells (& Auto
Zone) part number is VR706, *NOT* the VR733 which is used on virtually
all
Chrysler products. I paid $10 for one.
If undercharging is the problem, and it often is on Guzzies; I suggest
a
'60s Dodge voltage regulator, available at NAPA for $14. Part # VR3258.
Two wire hookup - small - cheap - ideal voltage. They will BTW, work on
any
Guzzi, alternator or generator.
2) Hella makes a replacement for the Bosch regulator (which is also
used in the original VW Bug, Mercedes, BMW cars, and Alfa Romeos of that
era). I've had mine so long, I've forgotten if it is already properly
adjusted, adjustable, or both. And it is plug compatible with the
Bosch.