I had the same problem and the adjusters on the wheel cylinder were frozw. I unbolted the wheel cylinder and let it float out with the linings all altogether. Gave me enough play to get behind the drum and pop the linings off of the wheel cylinder.


1949 Chevy 3600
1975 W-25 Hurst Olds
1970 GMC 1/2 ton Fleetside
2010 Chevy Silverado