Tom, never thought of that. Wouldn't the anti
knock back springs behind the caliper pistons
do the same thing for the brake M/C? I have
not found this function in ATE M/C. I'm using
Girling/Lucas Master Cylinders (popular for use in
racing cars) for both brake and clutch and they
dont have any different user instructions AFAIK.
Thomas
Thomas Walter wrote:
> Jeff,
>
> Thomas & Kurt pointed out they are usually different sizes.
>
> One additional item, often overlooked, is that
> you want the clutch master cylinder to fully flow the
> same amount of fluid in BOTH directions (when the clutch
> pedal is pressed, and released).
>
> On the brake master cylinder you want full flow when the
> pedal is pressed, but a restricted flow when the pedal is
> released. This provides for a "pumping action" by allowing
> you to rapidly pump the brake pedal. Good thing!
>
> On the brake master cylinders they have a small rubber
> disc with metal insert. They are bi-directional as you
> want the metal side towards the master cylinder, which
> allows for the fluid to push out the the rubber allowing
> for a large outgoing flow. When the fluid returns it will
> press up against the rubber seal, closing most of the
> holes in the metal disk off and allowing fluid to only
> flow back through on hole.
>
> http://www.tomwalter.com/bmc_kit.jpg
> Out of focus photo. The two "restrictor" valves are in the
> middle of the photo. One metal side up, other is rubber side
> up.
>
> Note: The "restrictor" valves are noted as "check valves"
> in the Nissan Literature. I think of a check valve being
> a "one way flow only". Not sure of a technical term for
> "one way flow - non restricted, restricted return" valve.
>
> Cheers,
>
> Tom Walter
> Austin, TX
> (really Round Rock... but few folks know about the rock!)
>
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