PREVOST X3-45 VIP 2017, Owner'S Manual

Page: 58 / 212

Controls and Instruments 4-24
Engine Brake (optional)
06703
The vehicle’s engine brake is by
default set to automatic (AUTO
mode
). On vehicles
equipped with this switch, it is
possible to disable the engine
brake (OFF mode).
From OFF or AUTO mode, the
driver can switch directly to
Engine Brake LOW
or
Engine Brake HIGH mode
by using the buttons on the
steering
wheel. Refer to
"Transmission Retarder” &
“Engine Brake” in Section 5
Other Features .
The switch will have to be
pressed again to return to AUTO
mode
(cycling the ignition will
have the same effect).
Engine Brake / Transmission Retarder
(Optional)
06703
Use this switch to select
between
the transmission
retarder and the engine brake
when using the vehicle speed
retarding device switches on
the
steering wheel. Both
systems cannot be in function
at the same time. This rocker
switch will be found on the
dashboard only if the vehicle is
equipped with both systems.
Refer
to "Transmission
Retarder” heading in this
chapter.
Refer also to
"Transmission Re
tarder” &
“Engine Brake” in “
OTHER
FEATURES
” chapter.
Engine Stop Override (with Automatic Fire
Detection and Suppression System)
06265
Press the Engine Stop Override
switch on the dashboard or the
Delay Engine Stop switch on the
AFSS protection panel to delay the
engine shutdown and extinguisher
discharge by an additional 15
seconds.
This switch is functional only if the
vehicle
is equipped with the
Automatic Fire Detection and
Suppression System.
CAUTION
Use this function if you are not prepared to bring
the vehicle to a safe stop (i.e. on a railroad track,
in intersection).
Driver Controlled Differential Lock (DCDL)
(Optional)
LOCK
06571
Press the rocker switch to lock or
unlock differential action. Refer
to "Other Features" chapter for
the
complete operating
instructions.
CAUTION
o
Engage DCDL only under poor road surface
conditions.
o
DCDL will not engage and will disengage in
speed higher than 5 MPH.
o
Do not lock DCDL when one or more wheels
are slipping, spinning or loosing traction. You
can damage the drive axle.
o
Using the rocker switch, unlock DCDL when
the need for improved traction has passed
otherwise it will reengage automatically as
speed gets below 5 MPH. Over a prolonged
period, this situation will increase tire wear
and stress to the vehicle.
o
Do not engage during downhill operation.