Controls - Volvo 9700 Manual

Controls

Parking brake
NOTE
To ensure the parking brakes functionality,
the pneumatic system must be charged up
and the blocking valve depressed.
Release manually
1 Depress the brake pedal.
2 Lift the stop ring and move the
parking brake hand control to its
forward position.
The symbol for the parking brake in the
instrument cluster goes out.
22
CAUTION
Never drive if the symbol for parking brake
applied is lit. Stop immediately if it lights up
while driving.
Apply manually
Pull the hand control backwards to its
end position to apply the parking brake.
When the brake is applied, the symbol
for parking brake lights up in the
instrument cluster.
DANGER
Always check that the symbol for applied
parking brake is illuminated before leaving
the driver's place.
Warning signal
A warning signal sounds if the vehicle
engine is shut down without applying the
parking brake.
Emergency brake
To use the parking brake as an
emergency brake move the hand control
gradually backwards to its parking
position.
NOTE
Keep the stop ring pulled up for the
duration of braking to prevent the control
to lock in the parking position.
WARNING
The braking distance increases when
braking with the parking brake since it only
works on the drive wheels. The risk of
skidding also increases.
Blocking valve
The blocking valve is activated when the
air pressure in the brake circuit is too low
and an attempt is made to apply the
parking brake. This may occur when bus
has been stationary for a longer period of
time.
To release the parking brake when the
blocking valve is activated:
1 Start the engine.
2 Allow sufficient brake pressure to
build up, approx. 4–5 bar.
3 When the stop lamp in the instrument
cluster goes out, depress the
blocking valve.