ROD AS 9T0803 - Caterpillar

Illustration 1 g02460720
SmartBoom Function components connectionsThe SmartBoom Function enables the operator to place the boom in a float mode. In the float mode the boom will float in the downward direction or the boom will float in the upward or the downward direction. The ECM will use the two SmartBoom solenoids in order to enable the two boom float modes. A boom float mode is enabled by pressing the button on the Soft Switch Panel (SSP). The modes that are available are the Boom Float Down Mode or the Boom Float Mode.When the SmartBoom Function is OFF, both of the solenoids are de-energized.When either the Boom Down Float Mode or the Boom Float Mode is active, pressing the Boom Float Disable button on the right joystick will disable the function until the button is released.In order for the ECM to enable the Boom Float Down Mode, the following conditions must be correct.
The Boom Float Down mode must be selected on the SSP.
The Boom Pilot Pressure switch must be closed indicating that pilot pressure is present in the boom hydraulic circuit.When the machine conditions are correct and the Boom Float Down Mode is selected, the ECM will enable the mode in a "boom float pending" mode. When the right joystick is moved to a boom down position, the ECM will energize the Boom Float Down Solenoid. This condition will result in the line relief valve releasing the hydraulic pressure for the boom cylinder head end back to the hydraulic tank. This function will allow the boom to float in the downward direction. The Boom Float Solenoid will be de-energized in this mode.When the float pending mode is active, the mode LCD on the SSP will flash. Once the ECM activates the Boom Float Down Mode, the mode LCD will illuminate steady.When the Boom Float Down Mode is active and the Boom Float Disable trigger switch on the right joystick is pressed, the ECM will activate the boom float pending mode. The boom will hold in position until the trigger switch is released. The SSP LED indicator will flash while in the pending mode.When the Boom Float Down mode is active, the ECM continues to operate the normal boom up functionality based on the position of the right joystick. In order for the ECM to enable the Boom Float Mode, the following conditions must be correct.
The Boom Float Mode must be selected on the SSP.
The Boom Down Pilot Pressure Switch must be closed (ON) indicating that adequate pilot pressure is present in the boom hydraulic circuit.
The Boom Cylinder Rod End Pressure Sensor must be indicating that pressure is below 25 bar (362.5 psi).When the machine conditions are correct and the Boom Float Mode is selected, the ECM will enable the mode in a "float pending mode" mode. When the right joystick is moved to a boom down position, the ECM will energize the Boom Float Solenoid. This will result in the line relief valve releasing the hydraulic pressure for the boom