Decreasing brake pedal travel. Swollen master cylinder cups. Repair or replace master cylinder. Repair or replace master cylinder, flush hydraulic system, and fill with approved brake fluid. Chech and adjust as necessary.
All brakes drag, but brake adjustment is correct.
Binding brake pedal. Soft or swollen rubber parts caused by incorrect or contaminated brake fluid. Free up and lubricate. Replace all rubber parts, flush hydraulic system, and fill with approved brake fluid. Repair or replace master cylinder.