Dragging Brakes

Lines or hoses dented, kinked, or clogged. Master cylinder compensating port clogged or blocked by swollen primary cup. Residual pressure valve installed in master cylinder (no valve used with disc brakes). Pistons frozen. Swollen cylinder seals. Caliper cylinder bores corroded. Power unit push rod out of adjustment. Sticking pedal linkage. Metering valve (in line to front wheels) not working. Power unit check valve faulty.