MCi Reliability Driven Series Operator's Manual page 54

BRAKES (EMERGENCY OPERATION)
Parking Brake (Emergency Operation)
If the front and rear brake system air pressure falls
below approximately 50  5 psi (345  35 kPa), the
parking brake will automatically apply.
An isolated emergency release reservoir has
enough air to release the parking brake three times.
Press and hold the emergency parking brake release
button (lower LH console switch panel). The parking
brake springs will reapply as soon as the knob is
released.
The parking brake emergency release button
allows the coach to be moved to safety when
both brake reservoirs are depleted and the
parking brake has applied automatically.Do
not use this feature other than to move the
coach to a safe parking location.
Do not drive the coach until the air loss
problem is fixed and the brake reservoirs are
fully charged.
Service Brakes (Emergency Operation)
This coach has a dual-circuit service brake system
with separate reservoirs for rear and front brakes to
ensure that brakes are available if one circuit fails.
If low air pressure occurs in both brake circuits at
the same time, an alarm sounds. The brakes will
remain operable until air pressure falls to 50  5 psi
(345  35 kPa) and the parking brakes apply
automatically to stop the coach.
52
Brake System Emergency Fill
Emergency fill provisions allow the primary or
secondary service reservoirs to be filled independently.
The fill provisions are in the front roadside service
compartment (Figure 60.).
Figure 60.
Coach Air Service Fill
A service fill provision is located behind the curb-
side rear service door (Figure 61.) allows filling the
coach air system from an external source, provided the
air system is intact.
Figure 61.
July 2015