IIIIIIIIIIIIIEEEEEEEEEEEEE!
Skye:
Fluid leaking from the brake pressure differential switch indicates an
internal leak in the internal shuttle piston.
The switch is not supposed to be fluid tight, the little round seals on the
piston are.
In answer to your question.
The only place to use Teflon Tape is on pipe fittings. These seal on the
threads.
Hydraulics are sealed either at the cone of the flare, or with a copper
washer. Neither of which is going to be improved by using sealant on the
threads.
In fact, sealant on the threads could mask another problem, such as the one
above, where there is a failure of the primary sealing surface.
Kelvin.
> -----Original Message-----
> From: Skye Poier [mailto:skye@ffwd.cx]
> Sent: Tuesday, September 10, 2002 1:04 PM
> To: MG Nuts
> Subject: Re: brake lines
>
>
> Here's another question, should you use anything on the threads?
> I had a leaky brake pressure switch, that stopped leaking when I put a
> bit of teflon tape on the threads. OK or no?
>
> Skye
>
> Word on the street is Bullwinkle said:
> > YES!
> > Most brake line fittings use the double flare which results
> > in a seal similar to the spark plug folded copper gasket.
> > The double flare has some spring to the rolled over inner
> > part. This compensates for any uneven thickness in the
> > material and missalignment between the cone on the brake
> > cylinder fitting and the matching one on the flare nut.
> > Tightening the nut too much collapses this spring.
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