Scott,
I could certainly be wrong .. it won't be the first time. However, the
only reason I got into this was when doing a disc brake conversion on
a '56 Chevy wagon that I own. I had the choice of putting a 2psi
inline valve between the master cylinder and the calipers or changing
to a late model unit in which it is integral, (I pulled a cool looking
aluminum master cylinder out of an '87 Buick .. a Skylark I think ..).
I suppose it is wrong to refer to this as a check valve as it only
maintains a residual pressure in the brake lines with the piston
retracted. It will not prevent movement of fluid in either direction
that exceeds it's rating. This master cylinder also has a warning
switch that operates when there is no residual pressure remaining in
the brake line when the piston is retracted, (to indicate that
pressure is no longer being retained and that you may be missing a
wheel or something I guess). I assumed that was the purpose of the
little metal spring tab, (oil baffle plate), in the base of the master
cylinder .... but if it does not wedge against the fluid entry hole in
the bottom of the fluid well ... then it could not possibly be
serving this purpose ... I guess I can reach in mine and pull it out
and see what happens ... if it is not blocking the hole then I don't
need it I guess .. and I couldn't possibly have any residual pressure
in the front brake lines.
campbell
----- Original Message -----
From: "vmax97" <[EMAIL PROTECTED]>
Subject: Re: check valve
> TC - I have to agree with Eric on this. Most systems do not have a
check
> valve. The rare exception would be in a system where the master
cylinder
> is mounted below the level of the brake caliper. All motorcycles,
that I
> have ever seen, have the master cylinder higher that the caliper.
The same
> goes for normal motor vehicles.
> Scott
> VMOA #500
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