Releasing The Parking Brake; Release The Parking Brake With Air From The Bus Tires - Volvo 9700 US/CAN 2016 Driver's Handbook Manual

154 If something happens

Releasing the parking brake

Release the parking brake with air from the bus tires

Only in a emergency case, you can use the
bus tire or wheel air pressure to release the
parking brake in case of being left without air
pressure in the pneumatic system circuit.
To perform this, do the following:
1 Block the drive wheels or grip a drag bar
to another vehicle in order to prevent the
bus movement when the parking brake is
release.
2 Connect the clamp head of the tire inflation
hose to the valve of one of the wheels.
3 Move the parking brake control to the
drive position (parking brake release,
for more information see the following
section on this manual: "Parking brake",
page 62).
4 While pressing the other end of the tire
inflation hose against the pump nipple,
press in the blocking valve. Now the
brake system is filled with the air from the
wheel. Filling can be interrupted as soon
as the air flow stops.
DANGER
Block the drive wheels to prevent the bus
from moving when releasing the parking
brake. Failure to do so may be result in
serious personal injury or death.
T0009182