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Aberdare · 11-17-2017, 07:17 PM

Well... it sounds perhaps that as you said, the brakes work TOO well! You could start by checking how much brake pedal free play you have and adjust as required so that you have between 1/4 - 1/2 inch of pedal before actual braking begins -- IE, the master cylinder piston begins compressing. This free play is an essential part of a proper Master Cylinder / Booster installation.

Since you only mentioned the Booster is new and installed by someone other than yourself... this is where I would begin looking for a possible fault. The Proportioning Valve is Next as a possible fault location, as too much hydraulic pressure can also cause the problem you have described. **Thanks for mentioning it Harpo!**

Abe

11-17-2017, 07:17 PM	#3
Aberdare Registered User Join Date: Oct 2017 Location: Manitoba, Canada Posts: 141	Re: Overly Touchy / Sensitive Power Brakes Well... it sounds perhaps that as you said, the brakes work TOO well! You could start by checking how much brake pedal free play you have and adjust as required so that you have between 1/4 - 1/2 inch of pedal before actual braking begins -- IE, the master cylinder piston begins compressing. This free play is an essential part of a proper Master Cylinder / Booster installation. Since you only mentioned the Booster is new and installed by someone other than yourself... this is where I would begin looking for a possible fault. The Proportioning Valve is Next as a possible fault location, as too much hydraulic pressure can also cause the problem you have described. Thanks for mentioning it Harpo! Abe __________________ RED SEAL CERTIFIED JOURNEYMAN SINCE 1993 My 1966 GMC Value Van Project 1951 GMC 9430 1-Ton I'm just going to put an OUT-OF-ORDER sign on my forehead... and call it a day.