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Re: 3 Questions

To: Warren.Allen@infores.com
Subject: Re: 3 Questions
From: "Donald H. Locker" <dhl@chelseamsl.com>
Date: Mon, 10 Apr 2000 10:57:23 -0400
Cc: triumphs@autox.team.net, breakstone@ems.att.com(Warren.Allen@infores.com)
References: <3923508CA412D311B3630008C709B11E1BF999@WINEX01>
Hi, Wallen.

> From: "Allen, Warren" <Warren.Allen@infores.com>
> Date: Sun, 9 Apr 2000 21:17:46 -0500 
> 
> 
> Listers:
> 
> Questions:
> 
> 1. I tried to bleed my brakes today using my fancy new Mitivac, and I was
> disappointed.  I'm looking to advice or commiseration.  Here's the story:  I
> attached the Mitivac to the bleed screw, pumped up pressure, opened up the
> bleed screw, and got only tiny quantities of brake fluid, mostly air.  There
> was suction, but I'm theorizing that the suction couldn't pull the brake
> fluid.  When I pumped the brake pedal. I was able to bleed the brakes
> normally.  But the Mitivac wouldn't pull the fluid through the lines.  Why
> not? Any successful or unsuccessful Mitivac stories out there??  Did I do
> something wrong?

The air bubbles that you see is probably entering around the bleed
screw threads.  Wrap a little teflon tape around the outside of the
bleed screw after loosening it.  The Mitivac should have no problem
pulling brake fluid [fluif] down then.

[sorry, no help on wheel brg adjustment]

> 3. Theory question:  In the case of bleed screws, and brake line flare
> connections, these are metal-to-metal connections, and they don't leak.  How
> can they not leak?  Why is no gasket needed?

Metal is also elastic, just not as much so as other softer gaskets.
The metal-to-metal seal is stronger than a joint sealed with a more
compliant product (rubber or such) and that is important in
high-pressure systems.

Donald.

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