PREVOST H3-45 VIP Owner's Manual page 69

Fast Idle
For extended idling periods, run the
engine at fast idle. Press down this
rocker switch to engage fast idle.
This increases the engine speed to
approximately 1,000 rpm. Return to
normal idle before driving or when
stopping the engine.
CAUTION
If the parking brake is released and/or the
transmission is engaged with the engine running
at fast idle, the engine will return to normal idle
and remain there as long as the parking brake is
not applied and/or transmission is not placed in
neutral (n).
The engine will return to fast idle once the
parking brake is applied or neutral (n) selected.
CAUTION
Return the engine to normal idle before shutting
the engine off.
Engine Brake (Optional)
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
"TRANSMISSION
(option)" on page 25
BRAKE" on page 25
Other Features.
The switch will have to be pressed
again to return to AUTO
(cycling the ignition will have the
same effect).
wheel. Refer to
RETARDER
& "ENGINE
in Section 5
mode
PA-1619 Owner's Manual H3-45 VIP
Controls and Instruments 4-23
Engine Brake / Transmission Retarder
Use this switch to select between the
transmission retarder or the engine
brake when using the vehicle speed
retarding device switches on the
steering wheel. Neither system can
be in function at the same time. This
rocker switch is present on the
dashboard, only if the vehicle is
equipped with both systems. Refer to
"TRANSMISSION RETARDER" on
page 12 in this section. Refer also to
"TRANSMISSION
(option)" on page 25
BRAKE" on page 25
Other Features.
Engine Stop Override (With Automatic Fire
Detection And Suppression System)
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.
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).
This switch is functional only if the
vehicle is equipped with the Automatic
Fire Detection
System.
Driver Controlled Differential Lock (Dcdl)
(Optional)
Press this rocker switch to lock or
unlock differential action. Refer to
DRIVER
DIFFERENTIAL LOCK (DCDL)" on
page 28 in Section 5 Other Features
for the
instructions.
RETARDER
& "ENGINE
in Section 5
and Suppression
"
CONTROLLED
complete operating