.. uhh.. so on my car where all i did is switch out the mechanical
components and no master cylinder ones means that I:
1. have a soon to fail disc drag on the rotors or
b. have installed something incorrectly in the Master Cylinder rebuild
leading to catastrophic failure later??
Lester
On Feb 18, 2009, at 1:37 PM, Gerard Chateauvieux wrote:
> That's actually incorrect Glen.
>
> A residual valve should not be used with disc brakes. There is a
> different valve used with the disc brake kits.
>
> see: http://brakecylinder.com/images/LockheedSprings.jpg
>
> The plastic valve on the right are the ones that should be used.
> This is more of a "retarding valve" rather than a residual valve.
> The metal cup style on the left needs to have the rubber insert left
> out. I suppose your hole in the rubber cup could serve the same
> purpose, but I would be concerned that before long, that hole will
> become easily obstructed with debris.
>
> In addition, it is also necessary to do something different when
> using the disc brake conversion on the Morris Minor. Separate
> external residual valves should be used for front and rear because
> of the position of the master cylinder. With the master cylinder
> being lower than the calipers, you need to prevent fluid drain-back
> by using a 2 lb residual valve in the main line to the front branch.
> I use a 10lb residual valve to the rear drums.
>
> Gerard
>
>> Message: 6
>> Date: Wed, 18 Feb 2009 08:52:59 -0800
>> From: "Glen Byrns" <grbyrns@ucdavis.edu>
>> Subject: Re: [Spridgets] Brake Master Cylinder
>> To: "Spridgets" <spridgets@autox.team.net>
>> Message-ID: <FF568384924E4C56AE1B2FFD9DAB8E31@vgl.cvg.ucdavis.edu>
>> Content-Type: text/plain; format=flowed; charset="iso-8859-1";
>> reply-type=original
>>
>> Its for retaining a bit of residual pressure so the brake shoe return
>> springs don't fully retract the shoes causing you to have to pump
>> up to get
>> brake action each time. Its also helps for solo bleeding.
>> HOWEVER!!! It
>> has less function in a disc brake car and will cause the front
>> discs to
>> constantly rub a bit too much and wear out the pads pretty fast.
>> Disc brake
>> conversions require you to punch a small hole in the rubber cup to
>> mitigate
>> the effect.
>>
>> Glen
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