[Vwdiesel] TDI altenator

[Val Christian]

> I'm assuming you checked stuff, like the output voltage with your VOM 
> (vom'ing in the rain...) and verified that the light is telling the 
> truth..., that there is excitation voltage at the light wire and stuff.

Yup.  It's real.  That's why I pulled the voltage regulator, and checked
the brushes.  They were OK, but there was corosion on the rings.  I
got interrupted several times by impatient family members and forgot to
check the rings for continuity.  I did clean them up.

> I second the cd manual blows chunks compared to the paper manual.
> Have you upgraded to the new bentley software Val?  It is much better 
> than the old explorer window based system, which sucked at the very best 
> of times. New one is a free upgrade, it isn't half as bad as the old 
> stuff, but an old school analog paper book is still the far far better 
> manual. (I have the cd for the Passat)

I talked to ebahn, since I had to transfer the SW from one work laptop
to a home laptop to use it, this time.  They pushed the upgrade and 
told me it would be some amount of money ($30??).  I declined.  I'm
that dissatisfied with the CDROM version.

> If you're sure it's the reg, not wires, just change the reg in situ.  It 
> isn't a big deal to pull the alt really, just wires off, belt off, bolts 
> out, alt out, assembly is reverse of disassembly.  The serpentine belt 
> is kind of nice when you've had the opportunity to fight with the 
> tensioner on a A2 with A/C.
> -james

James, it seems like a big deal.  The alternator is situated between a 
power steering pump (hard connections) on the top, and an AC compressor
on the bottom.  It's either hydraulic fluid containment, or it's hanging
the compressor by the hoses, and working from the bottom in the rain.

The belt adjustment on an A2 is a small nuisance when you consider that 
it takes 4 minutes to pull an alternator on an A2 with PS and AC.

The final issue in swapping the voltage regulator, is that I can't find 
one.  I spent 90 minutes searching the parts places on the web, after 
exhausting the locals first.

Val





> 
> Val Christian wrote:
> > OK, I'm getting frustrated.  Spent a couple of hours in the rain
> > working on the '03, which has a flashing battery (generator/altenator)
> > light.
> > 
> > Pulled the voltage regulator, with the altenator in situ.  The brushes 
> > were within the wear limits posted in the Bentley manual (CDROM version,
> > only version available when I bought it...get paper if you can, it's
> > faster to use).  The rings looked crappy, so I turned them with the 
> > engine acting as my lathe motor.  Nice and clean, put voltage regulator
> > back on.  Dropped two 13mm sockets, which slipped out of my wet fingers.
> > Haven't found them yet, but haven't taken off the bottom pan.
> > 
> > Altenator still not working.
> > 
> > Looking at Fred's page (not as fast as searching old VW deisel archives)
> > it appears that there are several methods for R&R'ing the 
> > altenator.  The CDROM Bentley implies a complicated job, but doesn't
> > seem to detail it.
> > 
> > Two questions:  Anyone done pulled the altenator, and able to comment
> > on how they did it?
> > Secondly, anyone have a source for the voltage regulator modules?  (mine is 
> > a Bosch...I think 90amp, but I don't know for certain.)
> > 
> > Any other comments?
> > 
> > Thanks.
> > 
> > Val
> > 
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