DISC-FRICTION 8E4133 - Caterpillar

Operation of Manual Mode
Illustration 4 g03369403
"Autoshift" ON/OFF switch indicated by arrow in Illustration 4.
The standard mode of transmission operation is the manual mode. The manual mode is active when the engine is started. If the machine is equipped with the "Autoshift" attachment, the manual mode is active anytime the "Autoshift" function is in the OFF position. When in manual mode, the operator uses the shifter to send commands to the Transmission ECM.Two gear presets can be configured for use in the standard manual mode or for use in the attachment "Autoshift" mode if the "Autoshift" feature is installed on the machine. The preset is the "Maximum" gear.Maximum Gear
The Transmission ECM allows a "Maximum" gear to be configured for the FORWARD and REVERSE directions by use of the Cat ET service tool. The configuring of the Maximum Gear must be done when the transmission is in NEUTRAL and the transmission output speed is zero (no travel). The configured Maximum gear will be used at all times during machine operation in either the manual mode or the "Autoshift" mode.The configured maximum gear that is configured in the Cat ET service tool will be the highest gear that the ECM will activate when the machine is in operation in the FORWARD direction or the machine is in operation in the REVERSE direction. The maximum FORWARD gear can be configured as low as 3F and up to 8F and the maximum REVERSE gear can be configured starting at 3R and up to 6R. For example, the factory default for the Maximum gear is set to gear 8F and gear 6R. The maximum gear setting allows for the normal operation of all of the available gears for the operation of the transmission. If the operator wants to limit transmission operation to no higher than gear 4F in the FORWARD direction and 3R in the REVERSE direction, the technician can configure the maximum gears to gear 4F and gear 3R by use of the Cat ET service tool. When done, the ECM will not allow a shift to a gear that is higher than gear 4F or gear 3R at any time during machine operation in either transmission mode. The ECM will retain the configured maximum gear parameter in both directions until the parameters are changed using the Cat ET service tool.Transmission Over-Speed Protection Strategy
Over-speed protection is a feature that utilizes transmission shifts to help protect the engine from running at an over-speed condition. In addition, over-speed protection ensures that the transmission will never be shifted into a gear that would cause an over-speed condition.Over-speed Upshift
The control will upshift the transmission by one gear when the transmission output speed reaches the over-speed up shift point for the current gear. The control does not limit the number of over-speed up shifts. If the transmission output speed continues to increase, the control will upshift, based on over-speed upshift points, until the transmission reaches the top gear.Over-speed Downshift
The control will downshift the transmission by one gear when the