HUB-INPUT 7T3097 - Caterpillar

Illustration 1 g02419056
Heavy Lift Function component connections.When the ECM energizes the Heavy Lift Solenoid, the hydraulic pressure output from the main hydraulic pump will be increased by 7 percent.For the ECM to enable the heavy lift function, all of the following conditions must be correct for the duration that the solenoid is energized.
The travel pedal position sensor is indicating the travel pedal is not depressed.
The service brake pedal must be locked OR the parking brake must be ON.When the machine conditions are correct and the Heavy Lift Enable button is pressed, the ECM will energize the Heavy Lift Solenoid for 60 seconds. The Heavy Lift Enable Button is located on the right joystick. Pressing the button again during the 60 second cycle time will not extend the ON time for the solenoid. Once the 60 second cycle is complete, the button can be pressed again and the ECM will energize the solenoid for another 60 seconds period.Note: If the heavy lift cycle is disabled due to a change in the machine conditions, the machine will continue to hold the load. However, the ECM will de-energize the solenoid and the main pump boost will be turned OFF.If the Machine Control has activated a diagnostic code for the Travel Pedal Position Sensor circuit or the Service Brake Pedal Limit Switch, the Heavy Lift function will not be enabled.