DISC Brake problem

[Alex Hayley]

Resurrecting a thread from the dead but this is the closest description I can find to the issue I am experiencing. I replaced my master cylinder, lines, hoses and calipers on my 72 C10. The front driver's caliper sticks even after pushing the piston back and then applying the brakes. The replacement master cylinder has two reservoirs of the same size but is listed at Autozone for front disc.

Master Cylinder link

Looking at the outlet ports, both are brass flares. Does the check valve look any different than the brass flare? Do I have a master cylinder for drum brakes?

Originally Posted by jhow66

You may have a 4 drum master cyld.--they have a check valve in the outlet ports to keep a certain amount of pressure on the drum brakes so the shoes will stay extended. The only way to check is to remove the line to front brakes at master cyld.If there is one (brass looking) take a sheet medal screw and put in the opening and with a pair of pliers pull it out. Reinstall line . Also if it had one when you disconnect the line both wheels should free up.