Destination Sign Controller - PREVOST X3-45 Commuter 2020 Operating Manual

Coach

Table of Contents

4-42 Controls and Instruments

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

operation

(disconnect

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

overspeed is detected.

DOB 1300-1556

command

converter

lockup)

and

inhibit

unless

engine

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

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.