AMC86Kid Posted December 8, 2016 Share Posted December 8, 2016 ok guys i have ordered a new Master Cylinder and a new Brake Booster i was just wondering what do i have to do to remove the old one from what i see i have to remove these two big nuts on both side of the brake booster then i have to disconnect the two little brake lines on the left side of the Master Cylinder then remove the air hose line from the brake booster do i sound correct or am i missing anything ? Link to comment Share on other sites More sharing options...
Eagle Posted December 9, 2016 Share Posted December 9, 2016 1) Be sure to put lots of old rags under the master cylinder before you start removing those lines. Brake fluid will drip out, and brake fluid eats through automotive paint in a nanosecond. You do NOT want to let any brake fluid touch your paint -- not even in the engine compartment, under the hood. 2) The master cylinder is held to the booster by two nuts. If you are replacing both the master and the booster, you don't even need to remove those. You can remove the booster and the master cylinder together. 3) The brake booster is attached to the firewall with four nuts. There is a pushrod from the booster through the firewall that attaches to the brake peddle. That pushrod should be fixed into the piston in the master cylinder, so you'll need to disconnect it from the peddle so it can go out through the hole in the firewall when you remove the booster. 4) It's easy to round off those nuts attaching the steel brake lines to the master cylinder. Do you have a set of brake line wrenches? If not, this would be a good time to invest in them. Your truck is 30 years old -- you'll be doing more brake work before you're finished. They look like this. You can get them at Sears or NAPA, and I guess at the other auto parts chains. Harbor Freight also has them, but I wouldn't trust them. Link to comment Share on other sites More sharing options...
AMC86Kid Posted December 9, 2016 Author Share Posted December 9, 2016 ok i will try my best to not spill any fluids and about the wrenches are you saying that it won't work with regular wrenches? also how do i take those 4 nuts off of the booster do i have to remove my dash or can i get to it from looking up from the driver floor board? Link to comment Share on other sites More sharing options...
DTA Posted December 9, 2016 Share Posted December 9, 2016 ok i will try my best to not spill any fluids and about the wrenches are you saying that it won't work with regular wrenches? also how do i take those 4 nuts off of the booster do i have to remove my dash or can i get to it from looking up from the driver floor board? Don't need them but they can be very beneficial and the 4 booster nuts are right above the brake pedal on the firewall.. No need to remove the dash! Link to comment Share on other sites More sharing options...
HOrnbrod Posted December 9, 2016 Share Posted December 9, 2016 Use the flare nut wrenches. Don't even try with open end wrenches; you will ruin the nut. These are must-have for brake lines, fuel lines, and everything else using flare nuts. If you don't use them, you will soon end up working on your fluid lines with a pair of vice-grips. That sucks...... Link to comment Share on other sites More sharing options...
AMC86Kid Posted December 9, 2016 Author Share Posted December 9, 2016 ok i will pick up a set tomorrow but should i get a metric set or a SAE set I'm assuming a SAE set since the vehicle was made in the USA Link to comment Share on other sites More sharing options...
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