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RE: STOP! Re: odometer not odometering either
... not to be argumentative ... but I was able to repair BOTH gears on my
odo without having to remove the needle. It wasn't a lot of fun getting it
all ack together and getting all the numbers to line up correctly and have
the reset button work correctly ... but I was able to do it myself on the
dinner table without having to pull the speedo face. As stated before YMMV
if you have a different model ... I just reported what I was able to do with
San Jose, CA (USA)
> -----Original Message-----
> Well, there are TWO failure mode as I have already
> explained.. One does NOT
> require faceplate removal, and one DOES. The latter mode is where the
> metal end gear (not the worm set-- this is the one inside the
> begins to slip on the main lay shaft. The only way to repair
> this one is
> to remove the assembly and peen the main gear and/or spline
> the shaft for a
> tighter interference fit. This, when done properly, will not
> fail again.
> With regard to the calibration-- the rest position is not the
> only factor
> involved in the speedometer adjustment.. Over time the preload spring
> usually weakens, and thus the speedo is wrong when you take
> it apart-- even
> if you put it back in the same place, it would still be
> wrong. SO, the
> repair of the gear problem is also an opportune time to
> calibrate it as
> well. This is done by inputing a known rpm into the speedo,
> and reading
> the speed. Each model has a different ratio, so you have
> know the specs of
> the one you're working on in order to calibrate. You also
> have to have a
> very accurate speed source (like a synchronous motor). This,
> is how the
> professionals do it.
> Therefore, I STILL recommend that you don't repair these
> yourselves. And,
> I wouldn't take it somewhere where they fix it and it brakes
> again... I
> wouldn't call that a "great job".
> At 11:57 AM 11/15/99 -0800, you wrote:
> >... IME, you can repair the odo without even removing the
> faceplate at all.
> >This would be on the ur-q/older 4k, so YMMV. In any event
> you will very
> >likely find that if you allow the speedo needle to pass the
> stop pin it will
> >rest at a location where there is a line in the silkscreen
> of the speedo
> >face. How do you think that the "professionals" do it? If
> you can't seem
> >to find a mark on your speedo face you can put a piece of
> masking tape on
> >there and mark it for yourself. Just reinstall the needle
> in the same
> >position and you'll be good to go.
> >For those who are feint at heart and live in the San
> Francisco Bay area
> >there os another place to have the work done called Palo
> Alto Speedometer.
> >I took the speedo from the ur-q there the first time it
> failed and they did
> >a great job. Once it failed again I figured that $65+ was a
> bit too much to
> >pay for a temporary fix.
> >Steve Buchholz
> >San Jose, CA (USA)
> >> -----Original Message-----
> >> WAIT!
> >> Of course this can be done, but DON'T DO IT! There is a
> rotary spring
> >> preload on the needle that keeps it resting against the stop
> >> pin. If you
> >> take the needle off to fix the shaft, then, you have no
> idea how much
> >> preload to put on the shaft when you put the needle back on.
> >> So, the end
> >> result is that your odometer works, but your speedo has a
> >> error. I have done this before, and it is no fun. There
> are ways of
> >> trying to calibrate this yourself, but I assure you it's just
> >> not worth it...
> >> Leave it to the professionals.
> >> I used "Overseas Speedometer" in austin, tx.
> >> www.speedometer.com Cost is
> >> about $65, but it is totally worth the two hours you would
> >> spend monkeying
> >> with it, only to scratch the face plate, end up with your
> >> speedo being 17.5
> >> mph off, and then, have your odo repair fail again after
> >> about 2 weeks.
> >> (this has happened to me, and I'm pretty good at
> instrument repair).
> >> Matthew Caprio
> >> >Does anyone know how to remove the needle (so I can take
> >> >the face plate off) w/o rendering the spedo usless? I
> looked in the