Parking Brake Mechanical Releasing - Volvo 9700 US/CAN 2016 Driver's Handbook Manual

Parking brake mechanical releasing

To perform the bus towing procedure if
there's no enough air pressure to release
the parking brakes, these can be released
mechanically.
To do this, proceed as follows:
1 Block the drive wheels or clamp a towing
bar to another vehicle in order to prevent
the vehicle to move when of releasing the
parking brake.
2 In both drive shaft brake cylinders there
are release bolts. Screw until you see out
a red plastic button in the center of the
screw, this the same in the other side, then
the parking brakes are released. The full
compression of the parking brake spring
requires approximately 45 turns, use
the wrench, the socket and the fastener
shank found in the tool box. Whenever
possible try to fill with air the parking
brake cylinders, this makes easier to turn
the nuts of the release mechanism.
3 The bus can be towed when the parking
brakes are fully released. Remember to
make the bus towing must be done using
the drag bar.
For more information about two available
bus towing procedures, see the following
sections on this manual: "Towing", page
148 or "Alternative towing procedure",
page 151.
If something happens 155
Note: Do not forget to reset the bolts to their
original position and attach the plastic cover
after towing has been completed.
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.
T5014634