another brake pedal question

[chris989]

Hello everyone,

I have searched the post and there are a lot discussing soft brake pedal after installing brakes. They all discuss the obvious.

I have a 89 suburban 3/4 4x4.

I installed a new master cylinder last week, bled the brakes and all was perfect. Strong pedal, great response.

a few days later i installed front pads, I did not break the seal on any brake lines, I used a clamp and compressed the caliper piston back into the caliper. Now i have super soft pedal.

My two thoughts are;
I damaged the master cyl. by forcing fluid in the reverse flow or,,
one of my "original" flexible brake lines at the wheels is ballooning slightly, absorbing the line pressure and i can not see it.

Has anyone experienced this problem?



I have done this many times before over the years with no harm to any other components.