freightliner 108SD, Driver Manual

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from being activated when the range-
preselection lever is down (in low range). When
in high range with the splitter-control button acti-
vated, the range-preselection lever cannot be
moved down.
18-Speed RTLO Splitter and Range-Shift
Models
Eaton Fuller 18-speed transmissions have eighteen
forward speeds and four reverse speeds. Each trans-
mission consists of a 5-speed front section and a
4-speed auxiliary section. The auxiliary section con-
tains low- and high-range ratios, plus a splitter gear.
All eighteen speeds are controlled with one shift
knob. All nine ratios in both the low and high ranges
can be split.
LOW gear in the front section is used only as a start-
ing gear; it is never used when the transmission is in
high range. LOW gear can be split, to provide both a
direct and an overdrive ratio.
Operation Tips, Eaton Fuller Splitter
and Range-Shift Transmissions
The following tips highlight important operation prin-
ciples.
•
For all conditions, use the highest gear that is
still low enough to start the vehicle moving with
the engine at or near idle speed, and without
slipping the clutch excessively.
When operating on-highway with no load or
under ideal conditions, use 1st gear to start the
vehicle moving forward.
When operating off-road or under adverse con-
ditions, use LOW gear to start the vehicle mov-
ing forward.
•
Use the clutch brake to stop gear rotation
when shifting into LOW or reverse while the
vehicle is stationary. The clutch brake is actu-
ated by depressing the clutch pedal all the way
to the floor.
•
Partially disengage the clutch to break engine
torque during normal gear shifts.
•
Double-clutch between all upshifts and down-
shifts that require movement of the shift knob.
Splitting of gears does not require movement
of the shift knob.
•
Never push the range-preselection lever down
into low range while operating in high range,
except when downshifting from 5th gear to 4th
gear.
•
Do not shift from high range to low range at
high vehicle speeds.
•
Preselect all range and splitter shifts. Move the
range-preselection lever and/or splitter-control
button to the needed position before starting to
shift.
•
Never make a range shift or a splitter shift
while the vehicle is in reverse.
•
Never move the range-preselection lever with
the shift knob in neutral while the vehicle is
moving.
•
Skip ratios while shifting only when operating
conditions permit, depending on the load,
grade, and road speed.
•
Never coast with the shift knob in the neutral
position.
Upshifting
1.
Position the gear shift knob in neutral. Start the
engine and bring the air system pressure up to
100 to 120 psi (689 to 827 kPa).
2. Position the range-preselection lever down, in
low range. See
Fig. 13.2 .
3. Make sure the splitter-control button is in the low
(rearward) position. See
Fig. 13.2 .
N
R
1
Dir
5
Dir
5
OD
1
OD
3
Dir
7
Dir
7
OD
3
OD
2
Dir
6
Dir
6
OD
2
OD
4
Dir
8
Dir
8
OD
4
OD
LOW
Dir
LOW
OD
A
B
C D
1
03/13/96 f260157a
A. High Range
B. Low Range C. Overdrive (forward)
D. Direct Drive (rearward)
1. Splitter Control Button
Fig. 13.2, Eaton Fuller 18-Speed Transmission Shift
Pattern
Manual Transmissions and Clutch
13.2