JohnnyMaryjo Posted November 17, 2023 Share Posted November 17, 2023 I had my brakes adjusted . but now the brake peddle goes close to the floor I have to pump the brake pedal for it to come up where it should be why is this happening before they did the adjustments the brakes were fine No idea why they did this. the pedal was where it should be up and not near the floor Why is this ? and what to do to correct it Johnny Link to comment Share on other sites More sharing options...
mobileparts Posted November 17, 2023 Share Posted November 17, 2023 Is the Master Cylinder Full of Brake Fluid ??? Meaning No Leaks ??? If it is Full, meaning No Leaks, the ONLY place that pressure originates is the Master Cylinder… Meaning that the Brake Fluid is rushing past the internal components of the Master Cylinder…. ( And then, the second part of this equation, is —- Is the inside of the Master Cylinder pitted badly enough, that that is then a problem of the housing being no longer acceptable… ) I have the Master Cylinder —- Brand NEW —- and the Master Cylinder Kit…. P. M. Me, if interested…. Craig…. Link to comment Share on other sites More sharing options...
keiser31 Posted November 17, 2023 Share Posted November 17, 2023 (edited) 2 hours ago, JohnnyMaryjo said: I had my brakes adjusted . but now the brake peddle goes close to the floor I have to pump the brake pedal for it to come up where it should be why is this happening before they did the adjustments the brakes were fine No idea why they did this. the pedal was where it should be up and not near the floor Why is this ? and what to do to correct it Johnny Make certain the shoes are adjusted to just barely rub the drums when adjusting. ALWAYS bleed the system after adjusting the shoes. Make certain the brakes are bled by starting at the furthest wheel cylinder from the master cylinder and work your way closer. Edited November 17, 2023 by keiser31 (see edit history) Link to comment Share on other sites More sharing options...
TerryB Posted November 17, 2023 Share Posted November 17, 2023 Here is the good, bad and ugly of the Chrysler Lockheed brake adjustment from a Grey-Rock brake service manual. The brake shoes have two levels of adjustment, one for minor wear and one for major adjustment. If the wrong adjustment is made the clearances between the shoe and drum can get too big. 1 Link to comment Share on other sites More sharing options...
c49er Posted November 17, 2023 Share Posted November 17, 2023 (edited) If the brakes had decent feel pedal height and when you brought it in to the shop and now low pedal.... Hopefully they did not do or mess with the major brake adjustment. The typical minor adjustment takes 15 minutes up on a lift. Rotate eight cam adjusting bolts in the correct rotation just enough to cause very minor shoe drag on the drums. And of course check brake fluid level before/after work. Edited November 18, 2023 by c49er (see edit history) 3 Link to comment Share on other sites More sharing options...
Rusty_OToole Posted November 18, 2023 Share Posted November 18, 2023 It sounds like they adjusted them wrong. There are 2 adjustments, major and minor. The major adjustment is only done when you have the brakes apart as for relining. The minor adjustment is to take up wear. Adjust shoes till they just touch the drum lightly. If the brakes are way out of adjustment, they may need to be adjusted again after a week or 2, after that they will hold their adjustment for a long time. Link to comment Share on other sites More sharing options...
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