Ford F-650 2015 Owner's Manual page 150

We recommend you not use the parking brake to stop a moving vehicle.
However, if the normal brakes fail, you can use the parking brake to stop
your vehicle in an emergency. Since the parking brake only applies
retardation to the rear wheels, the vehicle's stopping distance increases
greatly and the handling of your vehicle is adversely affected.
Power Park (Hydraulic Brake Vehicles Only)
This feature uses a brake chamber mounted on the chassis to power a
spring-applied, hydraulically released driveline parking brake.
The park brake dash-mounted, yellow knob-type switch controls the
Power Park Brake. The switch has three positions: apply (out), neutral
(central), and release (in). The switch is spring-loaded to return to the
neutral (central) position after pushing or pulling it.
There is no visual indication at the knob that the parking brake
P
is applied or released; check the instrument cluster. If the light
is illuminated, the parking brake is applied.
Applying the Parking Brake
Pull the yellow, dash-mounted parking brake knob. The parking brake
light illuminates indicating that the parking brake has been successfully
set.
Note: If the light blinks and a warning tone sounds when you pull the
control knob, the parking brake is not functioning properly. Seek
immediate service from your dealer. See Parking brake warning
system in this section.
Releasing the Parking Brake
WARNING: Hold the brake pedal down while moving the
gearshift lever from position to position. If the brake pedal is not
held down, the vehicle may move unexpectedly resulting in property
damage, personal injury or death.
2015 F-650/750 (f67)
Owners Guide gf (ownloose), 1st Printing, December 2013
Canadian_French (fr_can)
Brakes
Push the palm release lever (A) on
B
the parking brake handle (B) and
push down as far as possible to
A
release the brake. Driving with the
parking brake on causes the brakes
to wear out quickly and reduces
fuel economy.
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