•
Occasionally the road, load, or traffic conditions
make it desirable to restrict the automatic shift-
ing to a lower range. The lower the gear range,
the greater the engine braking power. When in
Manual mode, push or pull on the multifunction
stalk switch to reach the desired gear. In the
lower gear ranges, the transmission will not
upshift above the highest gear selected unless
the hold override upshift speed is exceeded.
•
Use neutral and apply the parking brake when
the vehicle is parked with the engine running.
Automatic Mode (A)
In automatic drive mode, upshifts and downshifts are
made by the transmission without driver intervention.
Automatic mode is the default start mode. If in
manual mode, a short push on the shift control mode
switch activates the automatic mode (A). Rotate the
D/N/R switch to Drive (D), and press down on the
throttle pedal. The transmission will shift automati-
cally.
NOTE: If attempting to select a non-Neutral
mode without applying the service brakes, the
transmission will not shift into gear. To shift into
gear, select Neutral, apply the service brakes,
and select the desired mode again.
In Drive, the start gear is automatically selected. The
transmission automatically performs upshifts and
downshifts.
Manual Mode (M)
In manual mode, the driver selects the maximum al-
lowed range. This may be helpful when traversing a
work site, railroad tracks, or steep grades, for ex-
ample.
When in automatic mode and with the D/N/R switch
set to Drive (D), a long push on the shift control
mode switch activates the manual mode (M). To in-
crease selected range, pull the lever up (towards
you); to decrease the selected range, push the lever
down (away from you). The transmission will not up-
shift above the selected range unless the hold over-
ride upshift speed is exceeded.
See
for an example of the driver display
with the transmission in manual mode.
NOTE: The transmission may deny a downshift
if the engine speed would fall outside of the ac-
ceptable range.
NOTE: If attempting to select a non-Neutral
mode without applying the service brakes, the
transmission will not shift into gear. To shift into
gear, select Neutral, apply the service brakes,
and select the desired mode again.
Low (L)
Use Low when wanting to maximize engine braking
and minimize the use of the brake pedal—for ex-
ample, when driving down long grades or when com-
ing to a stop. To select Low, push down on the multi-
function stalk switch, and hold in the down-shift
position for half a second or more. The lowest avail-
able start gear will be selected (the starting gear can-
not be changed in Low).
If Low is selected while moving, the transmission will
not upshift (unless the system initiates a Low over-
ride). The system will downshift at the earliest oppor-
tunity to provide maximum engine braking.
In the driver display, the low gear is shown as "1."
See
f611482
07/12/2017
1
2
1.
Current Gear
2.
Selected Gear
Fig. 17.12, Allison Gear Display in Manual Mode
1.
Low (displayed as "1")
2.
Highest Gear
Available in Low
Fig. 17.13, Allison Gear Display in Low Gear
Automated and Automatic Transmissions
17.12
Содержание Freightliner Cascadia 2021
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Страница 169: ...8 Climate Controls Cab Climate Controls 8 1 Sleeper Climate Control Panel 8 2 Accessory Heaters 8 3 Dual HVAC System 8 5...
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Страница 189: ...10 Cab and Sleeper Features Windows 10 1 Mirrors 10 1 Cab Amenities 10 1 Sleeper Amenities 10 2...
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Страница 227: ...15 Brake Systems Air Brake System 15 1 Meritor WABCO Antilock Braking System 15 4 Engine Brake 15 6...
Страница 235: ...16 Steering System Power Steering System 16 1...
Страница 251: ...18 Manual Transmissions and Clutch Eaton Fuller Manual Transmissions 18 1 Clutch 18 1...
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Страница 255: ...19 Drive Axles Interaxle Lock Tandem Axles 19 1 Driver Controlled Differential Lock DCDL 19 2...
Страница 269: ...21 Trailer Couplings Holland Trailer Coupling 21 1...
Страница 277: ...f547046 11 04 2019 Fig 22 9 Correct Halogen Headlamp Installation With Foam Grommet Headlights 22 6...
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Страница 311: ...27 Telematics Data Telematics Information Terms of Use 27 1 Frequency Bands and Maximum Transmission Output 27 3...
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