1939 master cylinder

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waedison
Posts: 8
Joined: Tue Sep 29, 2009 9:26 pm

1939 master cylinder

Post by waedison » Wed Oct 07, 2009 3:27 pm

Hi. New to the boards, new to owning a Packard. Ours is a 39 business coupe. When I got it, the brake pedal was to the floor. Got a m/c rebuild kit, installed it, but when I push down the brake pedal, the fluid comes out a small relief hole in the cap. If someone can give me some advice I'd sure appreciate it. /Thanks/Butch

Clipper47
Posts: 29
Joined: Fri Jul 10, 2009 3:56 pm

Re: 1939 master cylinder

Post by Clipper47 » Wed Oct 07, 2009 5:29 pm

Butch, Do the brakes work now (fluid expnading shoes etc.) or does the pedal still go to the floor? I am wondering if the relief valve was installed correctly or thee is not enough free play in the pedal to piston actuation (It should be about 1/2" ) ?

John Harley
Posts: 219
Joined: Mon Jul 06, 2009 3:44 pm
Location: Dumont, NJ

Re: 1939 master cylinder

Post by John Harley » Wed Oct 07, 2009 7:18 pm

waedison

Is it possible the line coming out of he master cylinder is blocked somehow?

Regards


John Harley

Dave Czirr
Moderator
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Joined: Tue Jun 16, 2009 5:30 am
Location: New Jersey

Re: 1939 master cylinder

Post by Dave Czirr » Fri Dec 04, 2009 9:06 am

I'm guessing the answer is that when you reinstalled the master cylinder, you didn't you didn't make the pedal free play adjustment, or didn't go far enough. Adjust the turnbuckle to allow for 3/4" pedal free play, otherwise the MC piston may never returns to it's proper "rest" position and the port between the reservoir and the cylinder isn't closed off.

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