Not much pedal ?

[dontoe]

I swapped over the 12b and front 44 to my '73 for the lower gears and lockouts. Ever since then I ain't had much of a brake pedal. The master cylinder had been borderline (the pedal leaked down when steady pressure applied) and I had to wring off the left rear line to the wheel cylinder (32 year old rusted) replaced wheel cylinder, new line to it too. So I replaced the master cylinder last Saturday (Bench bled MC) and did a thorough system bleed (used a quart of fluid - nasty black fluid removed) alot of air came out but..............the pedal still goes almost to the floor before any resistance and it is better if pumped several times before application. Got me stumped!

 

[70jimmy]

I had a similar problem and after numerous parts replaced and several brake bleedings I found my problem was a rubber grommet that was on the hose that goes into the booster was leaking. (shot in the dark)

 

[FWP]

Take a look at the rubber flex lines in the front. They like to wear out after 30 years or so

 

[dontoe]

Two options I hadn't considered. Thanks!!!

I installed a 4 inch Skyjacker lift too. I need to replace the front lines anyway. Where y'all recommend purchasing the extended lines from? I'll order them today before I forget again.

 

[dontoe]

I had a similar problem and after numerous parts replaced and several brake bleedings I found my problem was a rubber grommet that was on the hose that goes into the booster was leaking. (shot in the dark)

Is that between the MC and the booster? Duh. Read your post again! That is the line coming from the carb, right?

 

[sweetk30]

yes the vac supply line from carb base. the gromet to seal to the booster

 

[FWP]

Summit has em for a decent price, I forget how much though, 30 bucks or so IIRC

 

[dontoe]

Summit has em for a decent price, I forget how much though, 30 bucks or so IIRC

Oh didn't know Summit carried them. That works out well. I got a flaring tool set from them and forgot to order the adjustable proportioning valve so I'll get the extended lines and the APV too. Yea, thats a plan.

 

[dontoe]

O.K. ordered 'em a bit ago.
SJA-FBL16 Brake Lines, Braided Stainless Steel, Chevy/GMC, Blazer/Jimmy/Pickup, Pair $79.95
WIL-260-8419 Brake Proportioning Valve, Knob Adjustment, 1/8 in. NPT, Single Inlet/Outlet, Aluminum, Natural, Each $39.99
Total:$119.94
Handling Charge:$8.95
Total Order:$128.89

Thanks y'all

 

[ntsqd]

Should also repalce the rear brake hose too.