Ford 2013 F-650 Owner's Manual page 184

Driving Hints 183
DRIVING THROUGH WATER
If driving through deep or standing water is unavoidable, proceed very
slowly especially if the depth is not known. Never drive through water
that is higher than the bottom of the hubs. Traction or brake capability
may be limited and your vehicle may stall. Water may also enter your
engine's air intake and severely damage your engine, drive axles or the
transmission (through the breather ports).
Once through the water, always dry the brakes by moving your vehicle
slowly while applying light pressure on the brake pedal. Wet brakes do
not stop the vehicle as quickly as dry brakes.
2013 F-650/750 (f67)
Owners Guide gf, 2nd Printing, March 2013
USA (fus)