Horns; Transmission Retarder - PREVOST H3-45 VIP Owner's Manual

4-12 Controls and Instruments

HORNS

The electric horn (city horn) and air horn (highway
horn) are operated from the steering wheel center
pad. Use the Horn Selector switch located on the
lateral control panel to select the appropriate horn
type.
NOTE
When the vehicle is stationary, the electric horn
will sound to inform the driver that a fire is
detected in the engine compartment.
FIGURE 9: STEERING WHEEL

TRANSMISSION RETARDER

The transmission retarder is available only with the
Allison transmission.
The retarder can be operated using a hand lever
mounted on the steering wheel column or using the
service brake pedal.
To use the transmission retarder, it must be
activated first by pressing one of the two
Retarder/Engine Brake buttons on the steering
wheel.
Operating The Retarder Using The Hand Lever
With the retarder enabled and the accelerator pedal
released, move the output retarder lever clockwise
from the first to the sixth position. The braking effect
occurs as soon as the accelerator pedal is released.
The braking level for each position is as follows:
FIGURE 10: RETARDER HAND LEVER
Position
(0) Initial
(2)
(3)
(4)
(5)
(6)
NOTE
The output retarder lever is located on the right
side of the steering column.
Operating The Retarder Using The Brake Pedal
With the retarder enabled, the accelerator pedal
released and the output retarder lever in the initial
position (0), depressing the brake pedal will
engage
transmission retarder. This is referred to as
retarder-brake blending. The further the pedal is
depressed, the more total braking power is
provided.
RETARDER (option)" on page 25
information about the transmission retarder.
NOTE
If the wheels start to lock up on slippery roads,
the output retarder will automatically deactivate
until the wheels start to turn.
PA-1619 Owner's Manual H3-45 VIP
Braking level (up to)
Varies with brake pedal position. No
effect upon
accelerator pedal.
(1)
both the service
Refer to
release of the
16%
33%
49%
71%
89%
100%
brake and the
"TRANSMISSION
for further