PREVOST X3 Commuter Operating Manual Download

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4-42 Controls and Instruments

DOB 1300-1556

PA-1639 Operator's Manual 2020 X3-45 Commuter

CAUTION

Diesel engines should not be idled for extended
periods at "slow" idle. For extended idling,
engine should run at "fast" idle.

CAUTION

Do not allow your vehicle to "coast" in neutral
«N». This practice can result in transmission
damage. Also, no engine braking is available in
neutral.

D (Drive)

Use this position for all normal driving conditions.
After touching this pad, the vehicle will start in first
or second range and will automatically upshift to
a higher range as output speed increases. As the
vehicle slows down, output speed decreases, the
transmission automatically downshifts to the
correct range. If a locked brake or a slick surface
condition should occur, the TCM (Transmission
Control

Module)

will

command

converter

operation

(disconnect

lockup)

and

inhibit

downshift for a period of time or until normal
wheel speed has been restored.

NOTE

IMPORTANT: Brake pedal must be applied
when selecting «D» (Drive) otherwise the
transmission will stay in «N» (Neutral).

NOTE

The transmission should normally be allowed to
shift by itself, but manual shifting can be done
as described below.

1 (First Range)

Select this range when pulling through mud and
snow, when speed control is needed for driving
up or down steep grades or when maneuvering in
tight spaces. This range also provides maximum
driving torque and engine braking power or
retarder braking effect. In the lower ranges (1, 2,
3 and 4), the transmission will not upshift above
the

highest

gear

selected

unless

engine

overspeed is detected.

2 (Second Range)

Select this range when operating in heavy and
congested traffic. The transmission will start in
first and automatically upshift to second. When
slowing,

the

transmission

will

automatically

downshift to first range. Low ranges provide
progressively greater engine and retarder braking
power (the lower the range, the greater the
engine and retarder braking effect).

3, 4 (Third And Fourth Ranges)

Select these ranges when driving on moderate
grades or when load and traffic conditions limit
speed.

WARNING

Service brake should not be used to control the
speed of the vehicle on long, steep descents.
Instead, lower transmission ranges should be
used in conjunction with the output retarder.
Refer to

"TRANSMISSION RETARDER" on

page 27

in Section 5 Other Features for details

regarding both systems. This procedure keeps
service brake cool and ready for emergency
stopping.

CAUTION

When descending in lower ranges, care must
be taken that engine speed does not exceed
2,450 rpm.

DESTINATION SIGN CONTROLLER

The

Destination

Sign

System

(DSS)

automatically activated when the ignition switch is
turned to the ON position.

The controller provides a single control interface
to multiple systems on the vehicle. System
information

such

message

listings

for

destination signs, updated route or public service
information for the INFO transit system can be
downloaded via USB, Wireless or other on board
systems.