R2900 Load Haul Dump Autoshift Control (STIC Steering) Caterpillar


Autoshift Control (STIC Steering)
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Illustration 1g00944685



Illustration 2g00944669


Manual Mode - To select the gear speed, turn transmission autoshift switch (1) to manual position (2) .

Pressing transmission upshift switch (3) will cause the transmission to shift into the next highest gear.

Pressing transmission downshift switch (4) will cause the transmission to shift into the next lowest gear.


Automatic Mode - The operator selects the highest desired operating speed from the options on transmission autoshift switch (1). The electronic transmission control selects the proper transmission gear according to the ground speed of the machine.

Downshift switch (4) is active in all gears. Down shift switch (4) can cause transmission downshifts at machine speeds that are higher than normal.

Pressing and releasing downshift switch (4) will cause a downshift of one gear. The downshift will only occur if the machine speed and the engine speed will not result in an engine overspeed condition.

Pressing and holding downshift switch (4) will cause the transmission to continue to downshift as the machine speed decreases.

The transmission will remain in the downshifted gear for three seconds after the downshift switch is released. Then, automatic shifting is resumed.

Turn autoshift switch (1) to a selected gear speed in order to activate the autoshift function. The transmission will shift from first gear through to the selected gear automatically. The highest gear that will be used is determined by the selection on the switch.

As the machine slows, the transmission will automatically downshift.

Transmission Quickshift - The quickshift function only operates when the autoshift function is turned off. When the autoshift function is turned off, the transmission will automatically shift from first to second gear when the operator makes a forward-to-reverse direction shift in first gear. When shifting back to forward, the transmission will remain in second gear.

Note: The transmission quickshift feature does not affect reverse-to-forward direction shifts or forward-to-reverse direction shifts in gears other than first.

The transmission must have been in first speed forward before the shift to reverse is made for the quickshift to operate. If the transmission is shifted into first speed while in neutral and then the shift is made into reverse, the transmission will not automatically upshift to second speed.

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