Brake Problem HELP please

[SF87K5]

I had very soft and easy pedal after I swapped my 14 B in. Today I put on new wheel cylinders and new rear lines.(old one where shot.) We bleed all corners like 10 times, the pedal was very firm and was alot better after I turned the truck on. I drove it around the block and the pedal was good. So I started doing the drive in reverse to see how the brakes do.

Well after doing that I lost most of my pedal. It has gone back to the way it was. Brakes start stopping about a 1/2" from the floor and lock up when floored.

What can be wrong with them, I have racked my brain tring to figure this out. Could my master cylinder or power booster have taken a crap on me or what??? /forums/images/graemlins/confused.gif /forums/images/graemlins/confused.gif /forums/images/graemlins/confused.gif

All help is welcome, I just dont know what else to do besides put a new MC and PB in.

Thanks for all your help

 

[Triaged]

Are the drums adjusted good?

 

[gravdigr]

sounds to me like the brakes either need adjusted or the adjusters were assembled wrong. Drum brakes need to adjust up to compensate for brake wear. I believe this is done by the adjusters every time you go in reverse although I have heard that it can also happen when the e-brake is applied.

 

[SF87K5]

Ok I think I found out why my brakes suck, I was looking through my haynes amnual and saw I am missing some parts from my rear brakes. /forums/images/graemlins/frown.gif
I am missing in order
1. Parking brake strut
2. Strut spring
3. Actuator link
4. Acutuator lever return spring
5. Actuator lever
6. Actuator spring

I wounder if me missing this stuff off my rear drums will account for my brake pedal problem.

 

[jwduke]

Sorry to say, but probably so!

 

[Triaged]

[ QUOTE ]
Ok I think I found out why my brakes suck, I was looking through my haynes amnual and saw I am missing some parts from my rear brakes.
I am missing in order
1. Parking brake strut
2. Strut spring
3. Actuator link
4. Acutuator lever return spring
5. Actuator lever
6. Actuator spring

[/ QUOTE ]

That is "some parts"?
What would "alot of parts" be?

Basically it looks like you have brakes that won't self adjust...which I guess makes my first post a good guess. You should still be able to drive it like that you will just have to adjust the drums all the time to keep the peddle high.

 

[NITRO]

also, sounds like your seals in the MC may be shot. they are like $11 plus core. cant really go wrong. just more peace of mind.

NITRO

 

[SF87K5]

I am not driving my k5 till I get those parts replaced. mostly because of safty reasons. I should have by brakes fixed and my k5 on the road after the first of the year.