SHAFT 8D5126 - Caterpillar

Illustration 1 g03563619
Right Instrument Panel (Standard Two-Lever Control)
(1) Kickdown switch
Illustration 2 g03566956
Optional Joystick Control on the Right Instrument Panel
(1) Kickdown switch The Kickdown switch (1) is located on the right instrument panel in the Standard Configuration (See Illustration 1). The Kickdown switch (1) is located at the “trigger” position on the joystick when the machine is equipped with the Optional Joystick. (See Illustration 2)
Illustration 3 g03563624
(2) Transmission direction and speed control lever
Illustration 4 g03567877
(3) Autoshift Switch In order for the transmission to shift automatically, the autoshift switch (3) must be in the AUTO position and the left brake pedal fully released. The power train electronic control module (ECM) shifts the transmission automatically. The power train ECM evaluates the input that is sent from the engine speed sensor, the transmission speed sensors, and the left brake pedal pressure sensor in order to regulate transmission shifts. The power train ECM does not allow upshifts to a speed that is higher than the speed that is selected with transmission direction and speed control lever (2).When transmission Kickdown switch (1) is depressed, the transmission Kickdown switch signals the power train ECM to downshift the transmission by one speed. Pressing and holding the transmission Kickdown switch signals the power train ECM to continue to downshift the transmission as the machine speed decreases. The power train ECM delays resuming automatic upshifts for five seconds after the transmission Kickdown switch is released. Automatic upshifts are enabled if transmission direction and speed control lever (2) is moved from the current direction and the left brake pedal is not depressed. The automatic upshifts are enabled by either of the following:
Moving the transmission direction and moving the speed control lever
The five second delayWhen the key start switch is turned from the OFF position to the ON position, the power train ECM is activated. When the power train ECM is first activated, all the modulating valves (transmission clutch) are de-energized regardless of the position of transmission direction and speed control lever (2). The power train ECM then determines if the transmission direction and speed control lever is in the NEUTRAL position. The power train ECM disables the transmission if the NEUTRAL position is NOT selected. If the NEUTRAL position is NOT selected, the transmission direction and speed control lever must be returned to the NEUTRAL position before a direction can be selected. The power train ECM activates the start relay and the power train ECM allows the engine to start if the transmission direction and speed control lever is in the NEUTRAL position. The power train ECM allows the initial selected speed to be changed if the transmission direction and speed control lever is in the NEUTRAL position.Note: Transmission direction and speed control lever (2) must be in the NEUTRAL position when the key start switch is turned to the START position. If the transmission direction and speed control lever is not in the NEUTRAL position, the start relay will not be activated when the key start switch is turned.Reference: For more information