freightliner Run Smart ARGOSY, Driver Manual

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Eaton Fuller 18-Speed Splitter and
Range-Shift Transmissions
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.
See
Fig. 14.2 .
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.
Upshifting
1. Put the transmission 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 and make sure the splitter-control but-
ton is in the low position. See
Fig. 14.2 .
3. To start the vehicle moving, press the clutch
pedal to the floor, shift into LOW, then engage
the clutch with the engine at or near idle speed.
To shift from LOW direct to LOW overdrive,
move the splitter-control button into the overdrive
(forward) position, then immediately release the
accelerator. Press and release the clutch pedal,
and accelerate.
4.
Upshift from LOW overdrive to 1st direct by first
moving the splitter-control button into the direct
drive (rearward) position ( Fig. 14.2 ). Double-
clutch into 1st gear.
Continue upshifting through the shift pattern.
Double-clutch when moving the gear shift lever
(1st to 2nd to 3rd to 4th); single-clutch during
split shifts (1st direct to 1st overdrive, etc.).
5. When in 4th overdrive, use the range-
preselection lever and the splitter-control button
to upshift to 5th gear.
While in 4th gear, pull the range-preselection
lever up into high range and move the splitter-
control button to the low position. Double-clutch
into 5th gear, engage the clutch, and accelerate.
6. Upshift progressively through the high range
gears.
To shift from 5th direct to 5th overdrive (or 5th
underdrive to 5th direct on RT model transmis-
sions), move the splitter-control button to the
high position, then immediately release the ac-
celerator. Press and release the clutch pedal,
and accelerate.
Continue upshifting through the shift pattern.
Double-clutch when moving the gear shift lever
(6th to 7th, etc.); single-clutch during split shifts
(6th direct to 6th overdrive, etc.).
Downshifting
IMPORTANT: Never use the clutch brake when
downshifting, or as a brake to slow the vehicle.
1.
To downshift from 8th overdrive to 8th direct (or
8th direct to 8th underdrive on RT model trans-
missions), move the splitter-control button to the
low position, then immediately release the accel-
erator. Press and release the clutch pedal, then
depress the accelerator pedal once the transmis-
sion has shifted.
2. Start the downshift from 8th direct to 7th over-
drive by moving the splitter-control button to the
high position, then immediately double-clutch into
7th gear.
3.
Downshift progressively through each of the high
range gears, alternating the procedures in steps
1 and 2 above until reaching 5th direct.
4. When in 4th overdrive, push the range-
preselection lever down and move the splitter-
control button to the high position. Double-clutch
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. 14.2, Eaton Fuller 18-Speed Transmission Shift
Pattern
Manual Transmissions and Clutch
14.3