freightliner Run Smart ARGOSY, Руководство пользователя

Страница: 103 / 166

through into 4th gear, engage the clutch, and
depress the accelerator pedal.
5. Continue downshifting from 4th overdrive to 4th
direct, then 4th direct to 3rd overdrive, etc.
Double-clutch when moving the gear shift lever
(4th to 3th, etc.); single-clutch during split shifts
(4th direct to 3rd overdrive, etc.).
Eaton Fuller 10-Speed Range-Shift
Transmissions
Eaton Fuller 10-speed transmissions have ten selec-
tive, evenly-spaced forward ratios. Each transmission
consists of a 5-speed front section, and a 2-speed
auxiliary section. The ten forward speeds are ob-
tained by twice using a 5-speed shift pattern: the first
time in low range, the second time in high range.
See
Fig. 14.3 for the shift patterns, noting that the
4th/9th and the 5th/10th shift positions in the RT (di-
rect ratio) transmissions are directly opposite in the
RTO (overdrive ratio) transmissions.
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.
3.
To start the vehicle moving, press the clutch
pedal to the floor; shift into 1st gear, then engage
the clutch with the engine at or near idle speed.
Accelerate to 80 percent of engine governed
speed.
4. Upshift progressively from 1st gear through 5th
gear, double-clutching when moving the gear
shift lever.
5.
When in 5th gear and ready to move to 6th gear,
pull the range-preselection lever up into the high
range. Double-clutch into 6th gear, engage the
clutch, and accelerate.
NOTE: If after attempting to shift into the high
range the transmission remains in neutral, the
range synchronizer protection device may be
activated. Move the gear shift lever to neutral to
allow the range shift to complete, then shift back
into gear.
6. Upshift progressively through the high range
gears, double-clutching when moving the gear
shift lever and accelerating to 80 percent of en-
gine governed speed.
Downshifting
IMPORTANT: Never use the clutch brake when
downshifting, or as a brake to slow the vehicle.
1. Downshift progressively through each of the high
range gears, double-clutching between shifts.
2. When in 5th gear and ready to move to 4th gear,
push the range-preselection lever down into the
low range. Double-clutch into 4th gear, engage
the clutch, and depress the accelerator.
3.
Downshift progressively through the low range
gears, double-clutching when moving the gear
shift lever, as conditions require.
Clutch
Clutch General Information
To ensure long service life of the clutch, start in the
right gear, be alert to clutch malfunctions, and know
when to adjust the clutch.
Typical operation will not break down the clutch fric-
tion surfaces. Heat and wear are almost nonexistent
when a clutch is fully engaged. However, during the
moment of engagement, when the clutch is picking
up the load, considerable heat is generated. If a
clutch slips excessively, high temperatures develop
quickly between the flywheel, driven discs, and pres-
sure plates. An improperly adjusted or slipping clutch
4
N
7
2
9
6
1
8
3 10
5
7
2 10
5
6
1
8
3 9
4
R
Hi
Lo
R
Hi
Lo
A B
C
D
03/13/96 f260043a
N
A. RT Transmissions
B. RTO Transmissions C. High Range
D. Low Range
Fig. 14.3, Eaton Fuller 10-Speed RT and RTO
Transmissions Shift Patterns
Manual Transmissions and Clutch
14.4