Master Cylinder for SD hydroboosr disk drum

[Michael Mc]

My super Duty hydroboost external push rod is too long for most of the disk/drum mcs that i have looked at. I realize that I could grind it down or add a spacer but is there a better fit disk/drum mc where the push rod would fit better.

 

[TOFIC]

yep your bronco MC would work
take the pressure residual valve out of the reservoir serving the disks and away you go.
TOFIC

 

[Michael Mc]

Thanks TOFIC, I sold my original with the Vac Booster. So I'm looking for another MC. Will the Astro Van MC fit or will I need to modify the pushrod?

 

[Michael Mc]

I also have a 2001 Ford Explorer MC off a 5.0 AWD that fits perfect. Could I get away with adding a pressure residual valve for the rear?

 

[Apogee]

Yes, you can add an aftermarket 10 psi residual pressure valve to the rear circuit if you use a disc/disc master cylinder without any such provisions.

 

[Michael Mc]

Thanks, Ill try the explorer MC. Not sure what the bore size is but we will see how it stops.

 

[ransil]

The f-series mater cylinders should work, They come in aluminum, not sure what an explorer one looks like.
Also most of the F-150 come with an external residual pressure valve attached to them, hex looking thing hanging off the MC.
here is a pic, scroll down til you see the wrench

http://www.google.com/imgres?start=...144&tbnw=187&ndsp=26&ved=1t:429,r:6,s:99,i:18

 

[Michael Mc]

The Explorer MC looks exactly like the one in the picture minus the pressure residual valve. When I add the vave do I install it before or after the rear line comes out of the proportioning valve?