SPACER 6F6405 - Caterpillar

System Operation Description:The Electronic Control Module (ECM) has the ability to calibrate the mechanical differences between the Top Center (TC) of the flywheel and the TC of the timing gear on the camshaft. Any offset between the TC of the flywheel and the TC of the timing gear is stored into memory.Calibration of the timing is required if any of these conditions exist:
The ECM has been replaced.
Work has been performed on the front gear group.
Diagnostic code 261-13 Engine Timing Calibration required is active.Note: A timing calibration will not increase the available engine power.Test Step 1. Start the Engine and Check for Diagnostic Codes
Establish communication between the Caterpillar Electronic Technician (ET) and the engine ECM. Refer to Troubleshooting, "Electronic Service Tools", if necessary.
Start the engine and run the engine at low idle until the engine is at the normal operating temperature.
Check for active diagnostic codes.The engine must not have any active diagnostic codes during the timing calibration except for a 261-13 Engine Timing Calibration required.Expected Result:Only the 261-13 diagnostic code is active.Results:
OK - Only the 261-13 diagnostic code is active. Proceed to Test Step 2.
Not OK - There is at least one active code that is not 261-13.Repair: Repair any active diagnostic codes before you continue with this procedure.STOPTest Step 2. Calibrate the Engine Speed/Timing Sensor
Access the following display screens in order:
"Service"
"Calibrations"
"Timing Calibration"
Set the engine speed to 1100 50 rpm. The engine speed must be steady within this rpm in order for the calibration to be successful.
To calibrate the timing, select "Continue" on Cat ET. Wait until Cat ET indicates that the timing is calibrated.Expected Result:Cat ET indicates that the timing is calibrated.Results:
OK - Cat ET indicates that the timing is calibrated.Repair: Perform the following procedure:
Set the engine speed to low idle.
Exit the "Timing Calibration" screen on Cat ET.
Turn the keyswitch to the OFF position.
Return the engine to service.STOP
Not OK - The timing calibration procedure was unsuccessful.Repair: The following conditions can cause the timing calibration to fail:
If the crankshaft and camshaft gears have been reassembled incorrectly, the timing will not calibrate.STOP