Driver's Manual

gear, select Neutral, apply the service brakes,
and select the desired mode again.
Manual Mode Override
The system is equipped with a manual mode over-
ride function. If the vehicle is being "back driven" (for
example, descending a grade and vehicle speed ex-
ceeds engine speed) and the engine speed is exces-
sively high, the system will upshift automatically.
Also, if the start gear is changed and it causes the
engine to lug at takeoff, the system will override the
current position and select the best available gear.
Low (L)
Low (L) is at the lower end of the four-position selec-
tor switch located at the end of the SmartShift con-
trol. Use Low when wanting to maximize engine
braking and minimize the use of the brake pedal—for
example, when driving down long grades or when
coming to a stop. To select Low, press in the neutral
lock button and move the selector switch to the L
position. The lowest available start gear will be se-
lected (the starting gear cannot 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.
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 Override
The system is equipped with a Low override function.
If the vehicle is being "back driven" (for example, de-
scending a grade and vehicle speed exceeds engine
speed) and the engine speed is excessively high, the
system will upshift automatically. Also, if the start
gear is changed and it causes the engine to lug at
takeoff, the system will override the current position
and upshift.
Clutch Abuse Protection
Although a vehicle equipped with an UltraShift PLUS
uses an automated clutch, the clutch can still over-
heat and slip with improper use. The clutch abuse
protection feature helps protect the clutch if the auto-
mated clutch starts to overheat. When the clutch
abuse protection feature initiates and sounds a warn-
ing tone, full clutch actuation must be completed
quickly. If it is not completed quickly enough, the sys-
tem will either open the clutch (if the accelerator
pedal is not being pressed) or close the clutch (if the
accelerator pedal is being pressed). If the abuse con-
tinues, the system will open the clutch and take away
throttle control briefly to allow the clutch to cool
down.
To protect the clutch:
•
Select the lowest possible start gear for the
application.
•
Use Creep Mode when appropriate.
•
Use the service brakes and the Hill Start Aid
when launching on a grade.
•
Minimize the time it takes to engage the clutch
from rest.
•
Do not use the throttle to hold the vehicle on a
grade; use the service brakes.
•
Do not use the throttle to stop roll back on an
incline after Hill Start Aid disengages; use the
service brakes, and then relaunch.
•
Do not continually start and stop, especially
when loaded; use a lower gear or Creep Mode.
Creep Mode
The Creep Mode function allows the vehicle to main-
tain a constant speed at engine idle without the
driver holding the accelerator pedal position. This
mode is useful for very low-speed maneuvering and
applications where steady vehicle speed is required.
The vehicle speed is determined by the selected
gear ratio operating at governed low engine idle
speed. Any available gear may be selected, though
the transmission will downshift or exit Creep Mode to
prevent stalling if the engine lugs due to load condi-
tions.
By default, Creep Mode can be activated while in
Manual Mode or Low. Eaton’s ServiceRanger diag-
nostic software can be used to enable Creep Mode
in Automatic Mode and/or Reverse.
Engaging Creep Mode
To engage Creep Mode:
1.
Select Low or Manual Mode and the desired
gear (while stopped or moving).
2.
Apply the accelerator pedal to accelerate the ve-
hicle until the clutch is closed (engaged).
Automated Transmissions
15.3