freightliner 108SD, Руководство пользователя

Страница: 112 / 192

•
Using the throttle to hold the vehicle on a hill
•
Starting the vehicle from a stop in a gear that’s
too high
•
Overloading the vehicle
•
Using high idle with the vehicle in gear
The TCU is programmed to prevent clutch damage.
When the clutch overheats, the following alerts take
place:
•
The TRANS TEMP light comes on
•
The current gear indicator displays "C," then
"A"
•
A warning tone sounds at one-second intervals
The alerts continue until the clutch cools, the throttle
is released, or the clutch is fully engaged.
System Problem
In the event of a problem, complete the following
steps.
1.
Note the driving conditions at the time the prob-
lem occurred.
2.
Record the status of the transmission at the time
of the problem (AUTO or MAN mode, gear set-
ting, current gear, engine speed, etc.).
3. Complete the transmission reset procedure.
Transmission Reset Procedure
In some cases, proper transmission operation can be
restored by resetting the TCU. Use the following pro-
cedure to reset the TCU.
1. When it is safe to do so, stop the vehicle.
2. Select N by moving the gear selector switch to
N.
3. Set the parking brake.
4.
Shut down the engine.
5. Wait at least two minutes.
6. Restart the engine.
7. If the problem continues or the transmission
doesn’t achieve neutral after power up, contact
an authorized Freightliner or Eaton service facil-
ity.
Locked In Gear
If the vehicle is shut down in gear, the transmission
may become locked in gear. The transmission will
attempt to get to neutral during the next power up if
the gear selector switch is positioned on N. If neutral
can’t be achieved, a dash (–) will appear on the gear
indicator when the vehicle is restarted.
NOTE: If the transmission becomes locked in
gear while the vehicle is moving, increased
braking effort may be required to stop the ve-
hicle.
If the current gear indicator displays a dash during
power up with the gear selector switch in neutral,
complete the following steps.
1. Make sure the parking brake is set.
2. Turn off the ignition and wait at least two min-
utes.
3. Depress the brake pedal and release the parking
brake.
4. Make sure the gear selector switch is positioned
on N, then turn on the ignition key. Do not at-
tempt to start the engine yet.
5.
If necessary to get the transmission to shift into
neutral, release the pressure on the brake pedal
slightly.
6. Once the TCU reaches neutral, a solid N will ap-
pear on the gear indicator and the vehicle will
start. Apply the service brakes and start the en-
gine.
7. If the current gear indicator continues to display
a dash, contact an authorized Freightliner or
Eaton service facility.
Eaton Fuller UltraShift PLUS
Automated Transmissions
Eaton Fuller UltraShift PLUS automated transmis-
sions use shift selection software and electric clutch
actuation; a clutch pedal is not needed to operate the
vehicle. These transmissions use the four-position
SmartShift control (see
Fig. 14.1 ) on the steering
column to select mode, direction, neutral, low, and to
make manual shifts. To know what gear the transmis-
sion is in, see the current gear indicator on the dash.
Forward shifts can be made either manually or
automatically.
Automated and Automatic Transmissions
14.6