GEAR GP-BEVEL & PINION 3563418 - Caterpillar

Be sure to extend the sliphead before installing the Speed/Timing Sensor and also check that the Timing Gear is in a position that will not allow the sliphead of the Speed/Timing Sensor to protrude into the slot of the Timing Gear before the sensor is installed (visually inspect with a flashlight). Turn the crankshaft to rotate the Timing Gear, if necessary, to position the gear in a place that will not allow the sliphead to protrude into a slot. If the sensor sliphead does protrude into one of the slots, the sliphead will be broken off as the gear begins to rotate.
Turn the ECS to the OFF/RESET position.
Disconnect the sensor and remove the sensor.
Inspect the plastic sliphead for damage.
Check the tension. Gently extend the sliphead 3.5 mm (0.14 inch). Return the sliphead to the original position.
Extend the sliphead and reinstall the sensor. Expected Result:The sliphead takes at least 22 N (5 lb) of force in order to push in the sliphead from the extended position.Results:
OK - The engine speed/timing sensor and the sliphead are undamaged. The tension on the sliphead is normal. Reinstall the sensor. Proceed to Test Step 6.
Not OK - The engine speed/timing sensor or the sliphead is damaged, or the sliphead has insufficient tension.Repair: Replace the sensor. Calibrate the sensor. Perform the following diagnostic functional test Troubleshooting, "Engine Speed/Timing Sensor - Calibrate".STOPTest Step 5. Check for an Open in the Harness.
Turn the ECS to the OFF/RESET position.
For the primary engine speed/timing sensor, perform the following steps.
Use a suitable piece of wire to short J401-A and J401-B together.
Measure the resistance between P1-43 and P1-51. Wiggle the harness during the measurement in order to reveal an intermittent condition.
Use a suitable piece of wire to short J401-A and J401-C.
Measure the resistance between P1-43 and P1-33. Wiggle the harness during the measurement in order to reveal an intermittent condition. Expected Result:The resistance is less than 5 Ohms through the wires.Results:
OK - The resistance is less than 5 Ohms through the wires. Proceed to Test Step 11.
Not OK - The resistance is greater than 5 Ohms through the wires. There is an open circuit in the harness or connectors.Repair: Repair the connectors or wiring and/or replace the connectors or wiring.STOPTest Step 6. Check the Engine Speed.
Turn the ECS to the START position.
Connect Cat ET.
Crank the engine.
Observe the engine speed on the Cat ET screen. Expected Result:Cat ET displays a steady reading between 100 and 250 rpm. The engine starts.Results:
OK - The engine speed/timing sensor is operating correctly at this time.Repair: The problem may be intermittent. If the problem is intermittent, perform the diagnostic functional test Troubleshooting, "Inspecting Electrical Connectors".STOP
ENGINE DOES NOT START - Engine speed appears on the Cat ET screen but the engine does not start.Repair: Refer to the diagnostic procedure Troubleshooting, "Engine Cranks but Will Not Start".STOP
NO ENGINE SPEED SIGNAL - The engine will not start and no engine speed signal appears on the Cat ET screen. Proceed to Test Step 7.Test Step 7. Check the Supply Voltage