Brake System Bleeding Issues

Hey there!

I was just wondering if anyone else has had problems when bleeding their brake system. I'll start from the beginning.

My friend and I are trying to get his 91 B2200 safetied and on the road, so we changed all the pads / shoes / rotors / drums and such, and brought it in. The mechanic called the front driver's side metal brake line, and that the lines needed to be bled. We brought the truck home, replaced the line, ended up changing the drivers side rear wheel cylinder, due to braking the bleeder screw, then bled the system completely. After making sure that there's no air in the system, we brought the truck back to the mechanic, and he stated that the master cylinder was toast. So tonight, we bench bled the new master cylinder, and installed it. After this, we completely bled the brake system, but we still have spongy brakes. We followed the instructions in the Haynes manual to a T, and yet, no matter how much we bleed the system, we still have a spongy pedal. I was wondering if anyone else has ever had this problem, or has any idea on how to rectify the situation.

Thanks for your help!

Gregg

The rubber lines that go to the wheels are probably toast as well since they are now 16 years old.Replace the rubber lines with some good stainless ones from Goodrich and your pedal feel will be much better.Change out all your brake fluid while u r at it.BJ

The rubber lines were replaced before the truck was bought. The lady we got it from had all the rear metal lines changed, the rear rubber flex line and the front rubber flex lines. We were told by a mechanic that the pedal would feel really spongy if the shoes weren't adjusted properly, so we're taking the brakes apart tonight to tighten everything up

No adjustment on front disc brakes.Rears can be adjusted up by backing truck up and stepping on the brakes 2-3 times -they self adjust.Or u can access the brake adjust wheel thru a small rubber stop covered port in the rear brake backing plate.No need to pull brakes apart unless u just want to.BJ