My apologies to all for my slip of the fingertips! Of course, the metering
valve delays the FRONT brakes!
Ken H.
On Sun, May 20, 2018 at 11:02 PM Richard H Staples
wrote:
> "...the only function of that valve affecting brake performance
> is the metering valve. That valve merely keeps the rear brakes from
> applying until there's approximately 135 psi to the front brakes..."
>
> Don't mean to step on any toes, but actually the metering or hold-off
> valve delays application of the FRONT brakes until hydraulic pressure has
> overcome the rear brake shoe return springs. (The disc brakes of course
> have no return springs.) This was done to prevent the front pads from doing
> all the work in everyday driving with only light braking, and wearing out
> prematurely as a result. These valves were/are only used on vehicles with
> front disc/rear drum brakes.
> In the GMC, which requires either substantial pedal force or a
> 'sensitized' booster (which made a major difference in my coach, thanks Jim
> B.) to
> produce the hydraulic pressure needed to rein 'er in, I think you could
> get by without the valve with little ill effect.
> HTH
> Rick Staples
> --
>
>
valve delays the FRONT brakes!
Ken H.
On Sun, May 20, 2018 at 11:02 PM Richard H Staples
wrote:
> "...the only function of that valve affecting brake performance
> is the metering valve. That valve merely keeps the rear brakes from
> applying until there's approximately 135 psi to the front brakes..."
>
> Don't mean to step on any toes, but actually the metering or hold-off
> valve delays application of the FRONT brakes until hydraulic pressure has
> overcome the rear brake shoe return springs. (The disc brakes of course
> have no return springs.) This was done to prevent the front pads from doing
> all the work in everyday driving with only light braking, and wearing out
> prematurely as a result. These valves were/are only used on vehicles with
> front disc/rear drum brakes.
> In the GMC, which requires either substantial pedal force or a
> 'sensitized' booster (which made a major difference in my coach, thanks Jim
> B.) to
> produce the hydraulic pressure needed to rein 'er in, I think you could
> get by without the valve with little ill effect.
> HTH
> Rick Staples
> --
>
>
