Archived No brakes!

[Steve Robinson]

I took my 1998. 5 to the shop 10 days ago, for brakes pulling to the right. Tech thought the hydraulic hoses (flexible brake lines) needed to be replaced. He replaced them but that did no good. Then he felt the calipers needed to be replaced. That didn't help. Then he switched brake pads left to right etc. the truck pulled to the left rather than the right. Therefore, he replaced the old pads with new ones. Then he discovered the brake pedal went to the floor with lines bled and reservoir full. So he diagnosed the problem as a bad master cylinder. He has replaced the master cylinder and still the front brakes do not work. Now he is replacing the pressure valve between the front (disc) and rear (drum) systems. No luck! There is a little evidence of the front pads hitting the newly turned rotors but the truck lacks normal stopping power. The lines have been repeatedly bled, now, all the parts (except the rotors which were turned) have been replaced and the brakes still are not working properly. Anyone have any ideas or advice? We're stumped.

 

[Newt]

Anyone have any ideas or advice? We're stumped.

Yeah, take it some where else!



Newt

 

[EBerry]

I just created an account on the TDR website because my 96 brakes are bad as well. I can't figure out what is wrong.

I have replaced all of the same parts that you have and bled the brakes several times. My pedal creeps to the floor, the brake light comes on and it seems to be really spongy at random times. They do stop the truck but I want to fix the issue. My mechanic and I are both wondering what's going on. The only parts I havent replaced are the booster and the RWAL valve.

If anyone can give me any advice I would really appreciate it.

 

[HHhuntitall]

NEWt, sounds like air in the system or the safety valve has been tripped below the master cylinder. It switches to prevent massive fluid loss, and is a dismal POS. I'd almost wager the master cylinder has not been bled properly.



EBerry, you've got air in it, too, I'd bet. Probably the master cylinder.