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Not much pedal ?

Discussion in 'The Garage' started by dontoe, Feb 20, 2005.

  1. dontoe

    dontoe 3/4 ton status GMOTM Winner

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    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!
    :confused: :confused: :confused:
     
  2. 70jimmy

    70jimmy 3/4 ton status Premium Member GMOTM Winner

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    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)
     
  3. FWP

    FWP CRS

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

    dontoe 3/4 ton status GMOTM Winner

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

    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.
     
  5. dontoe

    dontoe 3/4 ton status GMOTM Winner

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    Is that between the MC and the booster?:confused: Duh.:doah: Read your post again! That is the line coming from the carb, right?
     
  6. sweetk30

    sweetk30 professional hooker Premium Member

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

    FWP CRS

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

    dontoe 3/4 ton status GMOTM Winner

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    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.
     
  9. dontoe

    dontoe 3/4 ton status GMOTM Winner

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    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
     
  10. ntsqd

    ntsqd 1/2 ton status

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    Should also repalce the rear brake hose too.
     

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