IC Bus CE Series, Operation And Maintenance Manual

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Operation
not be supplied to the wheelchair lift mechanism unless the
parking brake is applied.
NOTE: On vehicles equipped with Optional Wheelchair Lift,
the parking brake cannot be released until the Wheelchair
Lift is completely stowed.
NOTE: For a complete description of these interlocks, see
the Parking Brake / Wheelchair Lift (Optional) Interlock
procedures in the Hydraulic Brake section.
To engage Air Parking Brake
1. Bring the vehicle to a complete stop, using your brake
pedal.
2. Make sure the engine is at low idle.
3. With your foot still firmly on brake pedal, place
transmission in Neutral position.
4. Pull the parking brake control knob to apply the parking
brake.
To release Air Parking Brake
1. Have the engine running and your foot on the service
brake pedal.
2. Push in the control knob.
3. Wait until system pressure has reached 70 psi.
NOTE: DO NOT operate vehicle until system pressure has
reached 70 psi.
NOTE: To release the parking brake on vehicles with the
Optional Wheelchair Lift, the Lift must be completely
retracted and stowed.
Air Parking Brake Control Knob
Air Brake Gauge
The air operated parking brake has an air
gauge and warning buzzer. When pressure
in the parking brake air reservoir has been
reduced to about 57 psi (393 kPa), the
buzzer sounds.
A loss of pressure in the control circuit
prevents normal operation of the parking
brake.
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