Ford F650 Owner's Manual page 14

Vehicle Inspection Guide
Ammeter/Voltmeter:
Steering linkage
free play:
Hydraulic brake
check:
14
Engine starting (parking brake applied)
Check the gauge to see if the alternator is
charging.
Check for excessive free play in the steering
linkages. The steering wheel should have less
than two inches (five cm) of free play at rim
of steering wheel.
Pump the brake pedal three times, then apply
firm pressure to the pedal and hold it for five
seconds. The pedal should move (due to the
HydroMax pump operation); if it does not,
there may be a leak or another problem. Do
not drive the vehicle until the problem is
fixed.