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Controls and Operating
3-43
4th GEN Shift Controller
The 4th GEN shift controller has 6 forward ranges and 1 reverse range as
well as a neutral position. The shift selector has a two digit LED display,
that during normal operation will display the range selected and the range
attained..
Diagnostic information can be displayed on the two digit LED display by
pressing the diagnostic mode button or on diagnostic screen. There is a
hold override button on the lever that must be pressed when shifting
between Drive (D), Neutral (N) and Reverse (R). The hold override button
is released when the desired selector position is reached. The selector
can move between Drive (D) and the number of ranges without pressing
the hold override button.
The transmission upshifts and downshifts automatically between first
range and the highest range selected on the range selector in direct
response to the throttle position and transmission output speed.
When reverse range is selected the 'Reverse alarm' sounds and the
'Reverse light' illuminates to warn personnel at the rear of the machine
that reverse gear has been selected.
When drive (D) is selected, the transmission automatically upshifts and
downshifts through all six forward ranges as required by loads and travel
speeds. Selecting a lower range (4th, 3rd etc.) limits the highest range to
which the transmission will automatically upshift. If a lower range is
selected while moving forward, the transmission automatically downshifts
sequentially to the selected lower range at maximum controlled engine
speeds. Downshifts will not occur until machine is slowed by use of the
service brakes and/or retarder. When shifting from neutral to start from a
standstill, or to reverse direction, decelerate the engine to idle speed. To
move forward, select Drive (D) and accelerate the engine to the machine
load and speed requirements. The transmission will automatically upshift
from 1st through 6th ranges as travel speed increases.
With the throttle fully depressed, and the Mode Button in the 'POWER'
(primary shift schedule) position, the transmission upshifts to the next
higher range when the engine attains maximum rated speed, since
maximum power train output is needed under this condition. At lower
throttle settings where minimum power train performance is required, the
transmission will upshift to the next higher range at less than maximum
rated engine speed.
Upgrades or soft spots might slow travel speed, even at full throttle,
requiring transmission downshifts to maintain maximum power-train
performance. When this occurs, the transmission downshifts
automatically. Shift the transmission to the next lowest range if
transmission 'Hunting' or 'Shift Cycling' occurs.
When the vehicle is temporarily stopped, such as for yielding the right of
way to a loaded machine, the transmission can be left in the selected
range and the machine held stationary with the service brakes.
When the vehicle is stopped for extended period with the engine left
running, shift the transmission to neutral so that the parking brake is auto-
matically applied, and to avoid un-necessary heat buildup.
NOTICE:
Do not allow the
machine to coast in neutral.
This practice can result in
severe transmission damage.
MODE
SELECT
MONI
TO
R
1 2
3 4
5 D
N
R
3
1
2
4
5
1. Hold overdrive
2. Mode button
3. Range selected
4. Range attained
5. Display mode
button
1793
Содержание TA400
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