LEVER-CONTROL SHAFT 4B6651 - Caterpillar

Table 1
Diagnostic Codes Table    
Code and Description    Conditions which Generate this Code    System Response    
261-13 Engine Timing Calibration calibration required     The engine speed/timing sensor has not been calibrated.     This will not keep the engine from running. The fuel injection timing may be out of adjustment.    The engine speed/timing sensors provide information to the ECM by generating pulse signals as the timing reference ring rotates past the magnetic pickups on the sensors. A unique tooth on the timing reference ring passes by the engine speed/timing sensor. The engine speed/timing sensors provide a frequency that is directly proportional to engine speed (rpm). The engine speed/timing sensor produces a duty cycle output. This duty cycle provides the ECM with information on the crankshaft position.The secondary engine speed/timing sensor provides continuous operation of the engine if the primary engine speed/timing sensor fails. The loss of signals from both engine speed/timing sensors will prevent the ECM from actuating the injectors. To prevent any unnecessary down time, any problems with the speed/timing circuit should be repaired at the earliest possible convenience.Timing calibration is accomplished by installing a magnetic transducer into the side of the engine block and performing the "Timing Calibration" on Caterpillar Electronic Technician (ET). The transducer senses a special slot on the crankshaft counterweight. The transducer is connected to the ECM through a connector in the engine harness. The connector is located near the ECM on the engine harness.Check for active diagnostic codes and/or for logged diagnostic codes. Troubleshoot any diagnostic codes that are present before continuing with this procedure.
Illustration 1 g01410028
Installation of the TC probe (1) Notch (2) Crankshaft counterweight (3) Transducer adapter (4) O-ring (5) Timing calibration probe (6) Engine block (rear view) (A) Air gap 1 mm (0.0394 inch)
Table 2
Required Special Tools    
Part Number    Description    
6V-2197     Magnetic Transducer (Timing Calibration Probe)    
7X-1695     Cable (Timing Calibration)    
7X-1171     Transducer Adapter    
9S-9082     Engine Turning Tool    
Install the 7X-1171 Transducer Adapter ..
Turn the keyswitch to the OFF position.
Use the 9S-9082 Engine Turning Tool to put either the No. 1 piston or the No. 6 piston at top center. Refer to Systems Operation/Testing and Adjusting, "Finding Top Center Position for No. 1 Piston" for the correct procedure. After the top center position has been located, rotate the engine in the opposite direction of the correct engine rotation for 60 degrees.Note: Normal engine rotation is counterclockwise as the engine is viewed from the flywheel end.
Remove the timing calibration plug. The plug is located in the No. 4 cylinder on the right side of the cylinder block.
Install the 7X-1171 Transducer Adapter into the hole for the plug.
Install the 6V-2197 Timing Calibration Probe on the Engine.
If the crankshaft is not in the correct position when the 6V-2197 Timing Calibration Probe is installed, the probe will be damaged when the engine is started.
Put the 2D-6392 O-Ring Seal on the end of the timing calibration