797B Off-Highway Truck Fan Drive Hydraulic System: Fan - Calibrate

After the Brake/Cooling ECM has been programmed, the Brake/Cooling ECM must be configured. The Brake/Cooling ECM needs to know the configuration of the fan that is installed on the machine. The Brake/Cooling ECM must support three different configurations of the fans, since there have been changes to the fan iron. The configurations are listed below:

• 2438.4 mm (95 inch) fan with planetary drive
• 2692.4 mm (106 inch) fan with planetary drive
• 2692.4 mm (106 inch) fan with the motor only

The following procedure must be performed when you first flash the software on the machine and whenever the fan iron is updated. Also, if the software version is 156-1394-10 or earlier or if the Brake/Cooling ECM is replaced the process must be performed.
This is the procedure in order to change the configuration of the fan.

1. Verify that the software for the Brake/Cooling ECM is installed on the machine. The software should be 188-9570-00 or later.

2. Start the Caterpillar Electronic Technician (ET) and connect the ET to the Brake/Cooling ECM.

3. Go to the "Service" menu. Under that menu, select the "Configuration" entry from the menu.

4. ET will display all of the configuration data for the Brake/Cooling ECM.

5. Select the parameter that is called "Fan w/PlanetaryDiam" from the menu.

6. Double click on the parameter in order to change the value or select the "Change" button in the lower left hand corner.

7. The values for this parameter are listed below.
   
   • "0". The fan has a diameter of 2692.4 mm (106 inch) and the fan comes with only a motor.
   • "96". The fan has a diameter of 2438.4 mm (96 inch) and the fan comes with a planetary drive that is installed.
   • "106". The fan has a diameter of 2692.4 mm (106 inch) and the fan comes with a old planetary drive that is installed.

8. Exit ET.

Note: The Brake/Cooling ECM will not allow the parameter to be changed if the truck is moving.
This is the procedure that is used to calibrate the fan.

1. Verify that the software for the Brake/Cooling ECM is installed on the machine. The software should be 188-9570-00 or later.

2. Start the Caterpillar Electronic Technician (ET) and connect the ET to the Brake/Cooling ECM.

3. Go to the "Service" menu. Under that menu, select the "Configuration" entry.

4. ET will display all of the configuration data for the Brake/Cooling ECM.

5. Use the mouse in order to select the parameter that is called "Fan Calibrate Start".

6. Double click on the parameter in order to change the value or select the "Change" button in the lower left hand corner.Note: Enter a value of 1 in order to start the calibration procedure.

7. The Brake/Cooling ECM will refuse to start the calibration if any of the following items are true.
   
   • The engine is not running or the status is unknown.
   • The machine is moving or the status is unknown.
   • The requested gear command is unknown or the gear is not in "Neutral".
   • The actual gear is unknown or the gear is not in "Neutral".
   • The engine throttle is unknown.
   • Engine throttle above the 5% limit
   • The steering oil temperature is unknown.
   • Steering oil temperature is below 70 °C (158 °F) that is the minimum limit for starting.
   • Steering temperature is above 110 °C (230 °F) that is the maximum limit for calibrating.
   Note: If the user tries to trigger the calibration and any of the above conditions are not met, then ET will return an error message. The message will say. The value that was entered is not valid. The Brake/Cooling ECM has adjusted the value.
   Once the calibration test begins, the calibration test will stop for the items that are listed below.
   
   
   • The engine is not running or the status is unknown.
   • The machine is moving or the status is unknown.
   • The requested gear command is unknown or the gear is not in "Neutral".
   • The actual gear is unknown or the gear is not in "Neutral".
   • The engine throttle is unknown.
   • Engine throttle above the 5% limit
   • Steering oil temperature is unknown.
   • Steering oil temperature is below 65 °C (150 °F) that is the minimum limit for starting.
   • Steering temperature is above 110 °C (230 °F) that is the maximum limit for calibrating.
   • A request from a service tool is received in order to stop the calibration.
   Note: The user may abort the calibration by changing any of the above conditions. Typically, the calibration is stop by depressing the throttle.

8. Wait for the calibration test in order to be completed. At this time, the Brake/Cooling ECM will take over the control of the throttle. At the same time, the Brake/Cooling ECM will turn the fan ON in order to calibrate the output.

9. Change ET to "Status Group 7" in order to check the important speed information. This is not required.Note: When the engine speed goes back to Low Idle the calibration is complete.

10. Check the error message from the calibration.After the engine speed is back at "Low Idle", the configuration screen must be refreshed. The screen can be refreshed by selecting the icon that is for the configuration on ET or you can select the tab "Service - Configuration" from the menu. The error status is contained in a parameter that is called "Fan Calibrate Error". The list is some possible values that are listed in the "Fan Calibrate Error" table that is on ET.
    
    
    • "0" Calibration was successful.
    • "1"Calibration failed because conditions were not correct.
    • "2"Calibration failed because the fan did not stabilize.

11. Check response of the fan.This may be done by overriding the fan speed and verifying the response. The response should be checked in order to ensure that the fan reaches the top desired speed and that the fan does not overspeed.

12. Exit ET.Note: Calibration will not be lost when you reflash the software in the Brake/Cooling ECM.

If you need more information, You can visit:
http://www.cat.com

797B Off-Highway Truck Fan Drive Hydraulic System: Fan - Calibrate 2013-01-25T20:05:00-08:00 Rating: 4.5 Diposkan Oleh: Unknown