Problems after power disc brake conversion ??'s

[casterbuster]

i recently completed my ece power disc brake conversion. In doing so I replaced all of my brake lines as well. I also replaced my rear emergency cables.

I got this all finished up Sunday morning, everything was working great.

I had to leave the truck at my dads, I live 3 hrs away. He called me last night he said he had been using the truck to move some stuff around in the yard. He then said he was doing quite a bit of backing up. Now, he says the rear drum brakes are locking up. He said that he can loosen the line fitting on the proportional valve to bleed off pressure and the brakes will release, but will start to lock up again shortly afterward.

Do you guys have any clue what might cause this?

[casterbuster]

ttt

[rlm316]

When you had the rear brakes apart did you check the condition of the self adjusters? It sounds like the rears are over adjusted. You will need to pull the rear drums and check the adjusters. When you apply the brakes in reverse the brakes adjust themselves by a lever attached to the primary shoe which when the brakes are applied, turns the adjuster wheel. Also there is a residual pressure on drum brakes if I'm not mistaken.

[estig70]

Originally Posted by rlm316

When you had the rear brakes apart did you check the condition of the self adjusters? It sounds like the rears are over adjusted. You will need to pull the rear drums and check the adjusters. When you apply the brakes in reverse the brakes adjust themselves by a lever attached to the primary shoe which when the brakes are applied, turns the adjuster wheel. Also there is a residual pressure on drum brakes if I'm not mistaken.

yeah what he said.

take the drums off, and readjust to where you have slight drag.

Eric

[casterbuster]

Finally found the Problem, all I can say is duh. The brake pedal rod was adjusted out to far loosened rod, wah lah brakes released

[krue]

Beat me to it, I had that problem with mine.

[jkaylor68gmc]

That will do it.