Re: 4kq - Brake pressure regulator

[Wolff <quattro200@earthlink.net>]

A pressure bleader is super easy and cheap to make. Makes life with
hydraulic brakes so much easier. Go the the junkyard and grab a cap with
a sensor in it off an audi, bmw, vw, etc. brake fluid reservoir.  Rip
out the sensor. Get a chrome plated bolt on tire valve stem from an auto
parts store. Bolt the valve into the cap (might need a washer or two to
seal). 
   Now you need compressed air. The budget way is to get a bicycle pump
with a guage and then have a friend pump very lightly and slowly at
10psi while you bleed. (I've done it this way.) Second way is to use
regulated air from a compressor at 10psi. (Now I do it this way, plus if
you find a silent compressor it's really nice). I think someone talked
about making a hose to run from a tire as your air source, but you still
need a regulator. 
   Bleed brakes being careful not to run brake fluid in reservoir dry.
This method is superior to pumping the pedal as you can easily see the
transition from old to new fluid and you can see the bubbles clear out.
HTH,
Wolff

Chuck Schott wrote:
> 
> The brake pressure regulator on my '84 4000sq is leaking and needs to be
> replaced.
> 
> Q1 - Is it possible to temporarily plug the lines as I remove them, or will
> I get brake fluid all over the place and have to bleed the master cylinder
> and clutch anyhow?
> 
> Q2 - How much more would be involved if I wanted to remove the master
> cylinder so I could repaint the brake booster (lost some paint due to
> leaking brake fluid.)  Bentley manual seems to indicate that I would have
> to remove the booster and master cylinder together anyhow?
> 
> Q3 - I do not have a pressure bleeding setup, Can the master cylinder be
> pedal bled if it has run completely dry?
> 
> Thanks,
> Chuck
> 
> Seattle, WA