Posted by John on April 18, 2000 at 19:50:47:
In Reply to: Re: Master Cylinder Cutaway View Online posted by K Bishop on April 17, 2000 at 10:13:18:
The rubber washer seals the check valve to the cyl body. The check valve is supposed to keep a small amount of pressure in the system so the wheel cyl rubber pistons are pressed tight against the cyl and don't leak.