Alternator "brushes" Q

[Huw Powell]

suffolkd at aol.com wrote:
> My 200 20V alt went from 13 v to under 12 in a week.
> 
> Is suspect the brushes are gone.? Batteries getting weaker.
> 
> What is the Audi part number for the brushes which insert from the back?

As mentioned, the brushes are part of the voltage regulator, which is 
held on the back of the alternator by two bolts.  One will likely be 
very hard to remove due to corrosion, since it is also the ground path 
for the exciter circuit.  Good idea to have two nice new s/s bolts on 
hand (4mm x 18mm long).

Depending on how your VR is made, it might be possible to remove and 
replace the brushes.  I have used generic hardware store brushes, but 
they had to be filed down in one direction to fit properly.  You'll need 
to solder to do this, also.

Brushes run about $10 for a pair; new VRs are in the $40-50 range.

==See also== ;)

http://www.humanspeakers.com/audi/alternator.htm

-- 
Huw Powell

http://www.humanspeakers.com/audi

http://www.humanthoughts.org/