CAR= stock 65 coupe, 289, 2bbl, bone stock engine. 3spd.man trans, man.steering & man brakes ( 4wheel drum with single pot master cly.) This car has been my daily driver for the past 25 yrs. Approx. 4000 miles ago the complete braking system (excluding hard lines) was replaced with all new components. At that time the fluid was replaced with "DOT 5" silicone fluid. All was well untill one day the brake pedal seemed to not return-up as high as usual. At this time there was NO brake shoe drag. THE QUESTIONS ARE;
A. Is there a brake pedal return assest spring up and under the dash ???
B. Are there problems with DOT-5 replacements ??
C. Are the only solutions; 1st bleed the system and if that fails replace the master cly. ??
(toeing-up his brake pedal)
JAMES92130

 

No, Ford didn't use a spring on the brake pedal. Your master cylinder is shot.

 

Replace your master cylinder

 

Replace with a dual bowl since you have to replace it anyways.

 

Piston inside mc could be binding or mc return spring could be broken.

Dot 5 is not hygroscopic thus condensed ambient moisture can pool inside mc, wc, etc and lead to corrosion issues.

Dot 3 exposed rubber should not contact Dot 5 fluid.

Old Dot 3 exposed lines must be completely cleaned followed by alcohol flush and then dried.

 

Sounds like good advice. Can you recommend the correct model number ??

 

I still run 2 60's vehicles that are bone stock w/ single mc and working emergency brakes. I don't like to deviate from originality ***** nilly. If originality is tampered w/ the single mc is 1st to go.

 

Don't overlook the clutch/brake pedal support bushings/bearings. I've got the same problem with my 67 coupe right now. The pedal support bushings are shot and holes oblong'd. Sometimes when I push the clutch (also a 3 speed) and brake at the same time, the brake pedal will stick due to the whole assembly shifting/binding. I bought the roller bearing kit from CJ Pony Parts and am going to start the removal/installation tomorrow morning. Just something else to check, as well as your master cylinder.

 

I enjoy the clutch pedal roller bearing. Hopefully I won't have to remove that clutch pedal anymore.

 

If you want dual bowl, this is a good write up.
http://www.cjponyparts.com/tech-dual...ylinder/a/147/