Two problems related to power assist brake vacuum have been reported for the 2000 Ford F-250. The most recently reported issues are listed below.
Vehicle was going 10mph when hydro booster line blewout.
While driving and applying the brakes, the steering wheel becomes difficult to steer and the consumer looses all power steering. Nlm consumer states when applying the brakes at low speed the steering wheel would not turn and the booster pump runs both the steering and the brakes.