Meritor Splitter And Range-Shift Transmissions - freightliner CENTURY CLASS S Driver Manual

in 10-speed models. Double-clutch between
shifts. See Table 8.3.
2.
When in the bottom gear of the high-range shift
pattern, and ready for the next downshift, push
the range selection lever down into low range.
Double-clutch through neutral, and shift into the
top gear of the low-range shift pattern. As the
shift lever passes through neutral, the transmis-
sion will automatically shift from high range to
low range.
3. With the transmission in low range, downshift
through the low range gears as conditions re-
quire.
IMPORTANT: Never use the clutch brake when
downshifting, or as a brake to slow the vehicle.
Meritor Splitter and Range-
Shift Transmissions
Refer to the Meritor website for additional informa-
tion, www.arvinmeritor.com.
General Information, Meritor Splitter
and Range-Shift
13-Speed RMO Models
The Meritor RMO13–145A transmission has thirteen
forward speeds and two reverse speeds. Each trans-
mission consists of a 5-speed front section, and a
3-speed auxiliary section. The auxiliary section con-
tains low and high range ratios, plus, an overdrive
splitter gear. See Fig. 8.23.
Hi
5 5
R Dir OD
1
Lo
N
6 6
Dir OD
LOW
2
03/13/96
A. High Range
B. Low Range
1. Splitter Control Button
Fig. 8.23, Meritor 13-Speed RMO Model Transmission
Shift Pattern
1
7 7
Dir OD
3
A
B
C
8 8
Dir OD
D
4
f260154a
C. Overdrive
D. Direct Drive
All of the thirteen speeds are controlled with one shift
lever. Built into the shift knob of the lever, are a
range selection lever and a splitter control button (on
the side of the shift knob), that control range selec-
tion and gear splits, respectively.
Low gear in the front section is used only as a start-
ing ratio. The remaining four forward positions are
used once in the low range and once in the high
range. However, each of the four high range gear
positions can be split with the overdrive ratio of the
splitter gear. Ratios cannot be split while the trans-
mission is in low range.
Operation, Meritor Splitter and
Range-Shift
IMPORTANT: The shifter knob has an interlock
feature that prevents the splitter control button
from being moved up when the range selection
lever is down (in the low range); when the trans-
mission is in the high range, and the splitter
control button is up, the range selection lever
cannot be moved down.
Reverse
To drive in reverse, push the range selector lever
down to put the transmission in the low range. Push
the clutch pedal to the bottom of travel so the clutch
brake slows the transmission for initial gear engage-
ment; holding the clutch pedal at the bottom of travel,
shift into reverse.
Slowly release the clutch pedal to move the vehicle
in reverse.
Upshifting
1. To drive forward, make sure the vehicle is com-
pletely stopped and the range selector lever is
pushed down to put the transmission in the low
range.
Push the clutch pedal to the bottom of travel so
the clutch brake slows the transmission for initial
gear engagement; holding the clutch pedal at the
bottom of travel, shift into low.
2. Slowly release the clutch pedal to begin moving
the vehicle forward.
3.
To upshift into 1st gear, only partial depression of
the clutch pedal is needed. Do not push the
clutch pedal all the way to the floor and engage
Transmissions
8.26