Brake servo adjustment

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chips01
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Brake servo adjustment

Post by chips01 » Sat Oct 19, 2019 2:45 pm

Is there a procedure for setting output shaft from brake servo. I have swapped my old servo for a secondhand unit and I cannot find any information re the setting of servo output shaft.

Many thanks,



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Corky
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Brake servo adjustment

Post by Corky » Sat Oct 19, 2019 3:46 pm

Are we talking about the locating pin for the master cylinder?

If so, it needs about 1mm gap to the end of the recess in the master cylinder. Too close and it could prevent the calipers or wheel cylinders releasing.

That’s what I’ve set it at multiple times, and never had a problem.


Steve
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chips01
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Brake servo adjustment

Post by chips01 » Sat Oct 19, 2019 4:43 pm

Corky wrote:
Sat Oct 19, 2019 3:46 pm
Are we talking about the locating pin for the master cylinder?

If so, it needs about 1mm gap to the end of the recess in the master cylinder. Too close and it could prevent the calipers or wheel cylinders releasing.

That’s what I’ve set it at multiple times, and never had a problem.
Many thanks for that Corky, appreciated. So I measure depth of recess then I assume free brake pedal to measure servo rod and adjust. Then set end float on brake pedal. Just hope this works. Best wishes. Keith



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Brake servo adjustment

Post by Corky » Sat Oct 19, 2019 7:11 pm

It’s a bit of a faff to get it just right, but it will also work perfectly well if you just screw the pin home. It’s not a critical adjustment if there’s a bigger gap. What you don’t want, is the pin putting any pressure on the primary piston in the MC when the pedal is fully released or you will have a problem with the brakes sticking on, as well as problems bleeding the system.


Steve
Current:- SS1 Ti RG sprint car, Honda S2000, VW Touareg 3.0 V6
Prev:- Sabre Ti, 3xSS1 Ti, SS1 16v Turbo Racer, 5XGTC, 2XSE6B, 2XSE5A, 2XV6 Coupe, Sabre 6
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