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Driving
The light will blink and the chime will sound until the yellow control
knob is pushed in or approximately eight minutes have passed. If the
yellow control knob is pulled out again, the light will blink and the chime
will sound as a reminder that immediate service is required to the
parking brake system.
Releasing spring manually
WARNING: Do not attempt to disassemble the parking brake
chamber under any circumstances. The high spring load may
cause serious injury.
If hydraulic pressure is released from the spring brake chamber the
power spring applies the brake and, unless hydraulic pressure can be
re-established, the spring brake must be released as follows in order to
move the vehicle.
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.
104
2009 F-650/750 (f67)
Supplement
USA (fus)
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