My method - generic
 Posted By: Ray Calvo <porsray@sgi.net>
    Date: Monday, 5 March 2001, at 12:34 p.m. 

 In Response To: How to flush the brake system on 993? (Chris) Contributed by Ray Calvo

1) Pull as much old fluid out ofreservoir as possible with a turkey baster, refill with fresh fluid. 

2) Fill Power Bleeder with new fluid 

3) Hook Power Bleeder to master cylinder 

4) Start at right rear; remove wheel 

5) I built up a drain bottle which had a "tee" in it, with a separate 1/4" or so clear plastic tubing attached to each part of the upper "tee". Each tubing end gets attached to a bleed screw. 

6) Open both bleed screws, drain out a 1/4 pint or so (fluid looks clear with no bubbles). 

7) Close bleed screws, remove tubing, reattach wheel. 

8) Go to LR, RF, LF in that succession and repeat (4)-(7). 

During (6), helps to tap brake caliper with a rubber or wood mallet.