1986 Ford F-150 brakes hanging up

Drive it till it starts to bind or you notice drag, jack that wheel up, chock the rear wheels, put it in neutral, does the wheel spin, if not or it's hard to turn, open the bleeder screw, does it spin freely now? If yes, replace the flex hose, I recommecnd doing the same work to BOTH front brakes, this will elimante any issues with pulling to one side! Also both fronts are the same age and condition, if you don't do both now, you will real soon!