4-40 Controls and Instruments
DOB 1300-1556
PA-1639 Operator's Manual 2020 X3-45 Commuter
Service brakes are applied by depressing the
brake pedal. Braking increases with the amount
of pressure applied to the foot pedal.
A warning LED and an audible alert will sound
when the air pressure in either the primary or
secondary circuit drops. If this occurs, stop the
vehicle; determine the cause of the pressure loss
before proceeding.
The brake pedal can be used in conjunction with
the transmission retarder.
DANGER
Immediately report any brake system problem
to your company or directly to the nearest
Prevost or Prevost-approved service center.
Do not "fan" or "pump" the brake pedal. This
practice does not increase brake system
effectiveness but rather reduces system air
pressure thereby causing reduced braking
effectiveness.
CAUTION
"Riding" the brake by resting one's foot on the
brake pedal when not braking can cause
abnormally high brake temperature, can damage
and cause premature wear of brake components
and reduce brake effectiveness.
ACCELERATOR PEDAL
Controls engine RPM as needed.
NOTE
The accelerator pedal will not operate when the
entrance door is open.
ALLISON TRANSMISSION
The transmission is fully automatic: Proper
ranges
should
be
automatically
selected
according to driving speeds to improve vehicle
performance and control. The speed ratio of the
power
converter
changes
automatically
as
vehicle speed increases and direct-drive goes in
and out as necessary. The speed ratio is
modulated by vehicle speed and accelerator
pedal position. You will find the complete
transmission operation instructions and driving
tips in the
Allison 5th Generation Bus Series
available on the Prevost
Technical Publication web site.
OPERATION
When a button is depressed on the transmission
control pad, the corresponding letter or number is
displayed indicating the transmission is ready to
operate in the selected range. If the transmission
control module (TCM) detects a serious problem
in the transmission, the CHECK telltale lights on
the dashboard.
FIGURE 21: ALLISON PUSHBUTTON SHIFT SELECTOR
PUSHBUTTON SHIFT SELECTOR
The pushbutton shift selector has the following
elements:
R
: Press to select Reverse gear.
NOTE
The forward limit speed to activate the reverse
gear is 5 mph.
N
: Press to select Neutral.
D
: Press to select Drive. The highest forward range
available will appear in the digital display window
under SELECT. The transmission will start out in
the lowest available forward range, displayed under
MONITOR, and advance automatically to the
highest range.
Содержание X3 Commuter
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