The GMC CCKW

Hello the board,

After letting my CCKW sit in the barn for about 9 months the brakes bled off. It was a small leak on a loose hose. After fixing that I got my friend over and we tryed to bleed the brakes as per the TM. I was getting very little fluid out of the wheels and almost none from the hydro-vac. I refilled the master cylinder and used low air pressure. I got a solid flow of fluid from the hydro-vac as well as the wheels, but still no pedal! I remember reading in the TM if the linkage going into the Master cylinder is not adjusted right,no brakes. I checked the linkage and the piston seemed to be traveling the length of the master cylinder, and I removed the discharge line, hit the brake pedal and got plenty of fluid. I put a new rebuild kit in the master cylinder a few years ago and it still looks almost new. So, I don't know where to go from here. Any help whould be appriciated.

Thanks, Guy

Make sure you adjust the brakes 1st. If the brakes are way out of adjustment, you can 'eat' up all the fluid that the master and booster can produce pushing the shoes out

Thanks Doc. I will try asjusting the brake shoes, then do another bleed. I think that will work.