Tom Whitton Messages: 235 Registered: February 2004 Location: Paducah, KY
Karma:
Senior Member
Neil,
Congratulations on the improvement in your brakes. 800 and 700 PSI really aren't bad readings with a vacuum booster system. You could still have a small amount of air in the rear lines. However, to get significantly more pressure you would need to go to the Hydroboost system, which most say provides car-like braking.
Date: Sat, 25 Jul 2015 12:07:36 +0000
From: Neil Fonville
To: "gmclist@list.gmcnet.org"
Subject: Re: [GMCnet] Disc brake project still in failure mode
Message-ID:
Content-Type: text/plain; charset="us-ascii"
Update: So I installed the new combination valve using the screw in lock
tool while bleeding. The screw in lock tool keeps the internal pin from
moving and replaces the brake light connection during installation. Used
the Hupy bleeder and bleed the system by farther to closest to MC. Very
much improved. The coach is drivable and braking action is pretty good
but not great. I will drive it some this weekend to see if it improves
with settling in of the brake pads.
I have a few questions:
I get 800 psi at the MC but only 700 at the RR caliper. Does that mean I
still have a bit of air or tiny leak?
Since the MC is only pushing 800 psi. Would that be my max throughout
the system? Can anything be done to improve that?
The pedal has to be much farther in the stroke for the braking action to
occur. Did I not get the pin length long enough or incorrect?
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