MOUNTING GP-BELLOWS 2W2680 - Caterpillar

Elevated Downshift Function
This function improves retarding performance by elevating the upshift and the downshift points. When the retarder on the service brake is engaged, the ECU raises the shift points.When the engine retarder is on, the upshift and downshift points are raised because the retarder systems are more effective at higher engine speeds.Transmission PTO Control Selection
The transmission PTO feature controls the PTO enable output driver at J2-6. The PTO enable driver is used to control an OEM supplied control system that is connected to the transmission's auxiliary output shaft. This output is capable of driving 2 Amps and will be turned ON when all of the programmed conditions have been met.This function requires a SWC input, an Output Driver, and a set of programmable parameters that are controlled by the service tool. The PTO Control function reads an operator PTO switch input in order to direct it to turn on the PTO driver. Each system has specific operational conditions that must be met. The operational conditions are set by accessing the programmable parameters with the service tool. The following items are available for tailoring the PTO operation for a specific vehicle:PTO Mode Enable - The PTO mode enable parameter must be programmed to enabled before any of the other parameters will be in effect.PTO Mode Neutral Restriction - The PTO neutral restriction parameter is used to restrict the PTO operation to NEUTRAL. The PTO "ON/OFF" switch status will be ignored when the transmission is not in NEUTRAL.PTO Mode Gear Limit - The PTO mode gear limit parameter is used to limit the maximum gear that the PTO enable output may be energized. When programmed to FIRST gear, then the PTO enable output may be energized when in NEUTRAL, REVERSE, or FIRST gear. The PTO operation will be blocked the transmission is in SECOND gear or a higher gear.PTO Mode Maximum Engine Speed for Engagement - The PTO enable output can be restricted from energizing at too high of an engine RPM.PTO Mode Maximum Engine Speed for Operation - This feature limits the PTO operation to below the programmed engine RPM. When the engine rises above the programmed limit the PTO enable output will de-energize.PTO Mode Maximum Engine Speed for Engagement - This feature is used in order to prevent the PTO enable output from energizing above the programmed RPM.PTO Maximum Engine Speed for Operation - This feature is used to limit the PTO operation to below the programmed transmission output shaft speed. When the output shaft speed rises above the programmed limit, the PTO enable output will be de-energized.Shifter Selection Function
The ability to have two shift selectors is desired for some applications. This function requires a SWC input to the ECU sensor common and some programmable parameters.Note: The SWC must return to pin J2-22 for sensor common at the ECU. A chassis ground connection for the SWC is incorrect.When the shift selector input has a closed circuit, then the shift selector input switches to the second shift selector.