Ford F-650 2015 Owner's Manual page 153

152
If your vehicle is equipped with a manual transmission:
1. Press and hold the service brake pedal while the engine is running.
2. Press and hold the clutch pedal.
3. Select the appropriate drive gear.
4. Push and hold the yellow, dash-mounted parking brake knob until the
parking brake light turns off, then release.
Parking Brake Light Illumination Due to Low Air Pressure
If the air pressure becomes too low at any time during vehicle operation,
the parking brake may apply and the parking brake light turns on.
If the parking brake applies due to low air pressure, immediate service is
required to the parking brake system.
Parking Brake Warning System
If the parking brake light blinks and a tone sounds when pulling the
yellow control knob out, this indicates the parking brake is not
functioning properly. Seek service for the parking brake immediately.
With the ignition key not in the run position:
• A tone sounds if the parking brake remains released (or in an
unknown state). The tone stops in approximately eight minutes or
until the parking brake is applied. Seek service for the parking brake
immediately.
Diesel engines: Parking brake light operation (the light only works
when the ignition key is in the run position):
• On: Parking brake applied.
• Off: Parking brake released and no faults or malfunctions.
• Blink and tone: Parking brake released (or in an unknown state)
and faults or malfunctions exist.
Releasing Spring Manually
WARNING: Do not attempt to disassemble the parking brake
chamber under any circumstances. The high spring load may
cause serious injury.
WARNING: Block the wheels to help prevent the vehicle from
moving.
WARNING: Unexpected and possibly sudden vehicle movement
may occur if these precautions are not taken.
2015 F-650/750 (f67)
Owners Guide gf, 2nd Printing, April 2014
USA (fus)
Brakes