converting from servo to non servo

Anonymous · Post by **Anonymous** » Sun Sep 10, 06 7:55 pm

when converting over from servo assisted drums with single circuit,to dual cicuit manual brakes ,other than the master cylinder , what else would I need? is the pushrod different? etc,and would 2 tee pieces do for the pipes?

Pete · Post by **Pete** » Sun Sep 10, 06 9:23 pm

They normally (always!!) run a proportioning valve to prevent the rear brakes locking up and to provide the brake waning light to advise of imbalance in line pressures.

Most hot rodders who are not worried about originality run after market manually adjusting propotioning valves for this purpose.

Many after market kits include a proportioning valve.

Pete

Blue · Post by **Blue** » Mon Sep 11, 06 6:53 pm

You would need a pushrod for a manual brake car. If you can't find one, mopar performance make an adjustable one that would get you out of trouble.

Anonymous · Post by **Anonymous** » Mon Sep 11, 06 10:56 pm

cheers everybody

Matt · Post by **Matt** » Sat Sep 16, 06 9:44 pm

Don't know for sure if this applies to your car , but 68-70 B-bodies with power brakes use a crank linkage between the brake pedal and the master cylinder pushrod, that the manual brake cars do not have . This allows the pedal on PB bars to sit lower to the floor, but also effectively halves the effort at the pushrod.

If this is the case, you'll need to remove the linkage, and use the pushrod from a manual brake car . The 68-70 manual brake pushrod is also positively retained in the m/c by a rubber lock-ring that must be installed.

Anonymous · Post by **Anonymous** » Sat Sep 16, 06 10:48 pm

thanks matt

Anonymous · Post by **Anonymous** » Sun Oct 08, 06 5:29 pm

going to start on the brakes next week

I have 2 suitable master cylinders,one has a pushrod attached,is this the only bit that`s required? or do I need a pedal ,also I have single circuit at the mo. there is a block underneath the master cyl. with all the pipes going to it, canI just remove this & fit a pair of tee pieces,and then fit an adjustable proportioning valve into the rear circuit?