Terex TR100, Operation Manual

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3-22
Controls and Operating
The transmission provides six forward ranges, one reverse range and a neutral
position. The transmission upshifts and downshifts automatically between first
range and the highest range selected on the range selector in direct response to
throttle position and transmission output speed.
When reverse range is selected the 'Reverse Alarm' sounds and the 'Reverse
Light' illuminates at the rear of the truck. This feature warns personnel to the
immediate rear of the truck that the operator has shifted the transmission to
reverse.
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 Selection Switch in the 'POWER'
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 powertrain performance. When
this occurs, the transmission downshifts automatically.
Shift the transmission to the next lowest range if transmission 'Hunting' or 'Shift
Cycling' occurs.
When 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 stopped for a more extended period with the engine left running, however,
shift the transmission to Neutral to avoid unnecessary heat buildup, and apply
the parking brake.
Always select neutral and apply the parking brake before leaving
the operator's seat.