Operation
Powered Parking Brake Control Knob
To Manually Release the Powered Parking Brake.
1.
Turn ignition switch to the ON position.
2.
Depress and hold the brake pedal.
3.
Take transmission out of the P (Park) position.
4.
Push and hold the Parking Brake control knob until the
parking brake indicator goes out, then release.
NOTE: If the transmission is not out of the Park position, the
Parking Brake will not be released.
The transmission Shift / Wheelchair Lift Interlocks will also
prevent release of the Parking brake until all conditions
are satisfied (see Wheelchair Lift Interlocks in Automatic
Transmission Operation section).
Air Brakes
WARNING
To prevent property damage, personal injury,
and / or death, never operate the vehicle when
insufficient air pressure (less than 70 psi [483
kPa] is indicated for either the primary or
secondary air system, or if a low-pressure
alarm is sounding and a warning indicator is
illuminated. The volume of air required to stop
the vehicle may be greater than that available.
Have the brake system checked and repaired
before returning the vehicle to service.
All air brake equipped vehicles have a split brake system. A split
system provides a way to stop the vehicle if a failure occurs in
either the primary or secondary brake system. If air pressure is
lost in one system, the remaining system continues to provide
braking action.
Even though there is braking capability for emergency stopping,
do not operate the vehicle when a failure is indicated, because
there may be no way of replenishing air pressure.
If vehicle has been parked for an extended period in cold
weather, always check to be sure all wheels are rolling free
(brakes are not frozen) when starting out.
Always clean
accumulated ice and snow from brake linkage.
If air pressure in either section of the split air brake system is
reduced to 57 psi (393 kPa) the warning buzzer will sound and a
RED indicator on the Instrument Panel Gauge Cluster glows. In
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