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Old 03-20-2017, 10:13 AM   #3
B. W.
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Join Date: Nov 2014
Location: Bigfork, Montana
Posts: 1,137
Re: Brakes..ugh...help.

The brakes are dragging.

Do what geezer said first. After that, check your push rod lengths. Check the one going from the brake pedal to the booster (or bell crank if it a factory style setup) It should line up with your new hole & the pin should fit without you having to move the rod in. A"smidge" is OK but you don't want to "pre-load" the booster. You can adjust the length of the rod (see pic)

Next, check the master cylinder push rod length. This is between the master cylinder & the booster. Don't take the brake lines loose, just loosen the bolts holding the master to the booster. Now, with a helper inside the cab, have him/her hold up on the pedal. You should be able to hold the master cylinder against the booster without having to force it into position. Have the helper slowly apply the brake pedal it should almost immediately begin to move the master cylinder off of the booster. Check this a couple of times, there should be just a little bit of play before the push rod touches the master cylinder. If the rod is not the correct length it should have an adjustment screw on the end.

My guess is one of your push rods is too long. This will cause your brakes to be applied even with your foot off of the pedal.
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