WASHER 5B3850 - Caterpillar

The speed/timing sensor provides information about engine speed and the position of the crankshaft to the ECM.
Illustration 1 g03787613
Typical speed sensor locations (1) Camshaft speed sensor (2) Crankshaft speed sensor. (3) Crankshaft speed sensor
Remove engine speed/timing sensors (1), (2), and (3). Inspect the condition of the end of the magnet. Look for signs of wear and contaminants.
Clean any debris from the face of the magnet.
Illustration 2 g03787616
Crankshaft speed timing sensor
Illustration 3 g03797976
Camshaft speed timing sensor.
Check the tension of the slip head. Gently extend the slip head (2) for a minimum of 4 mm (0.16 inch). Then push back the slip head.When the slip head has the correct tension, at least 22 N (5 lb) of force is required to push in the slip head from the extended position.
The sliphead must be fully extended when the speed/timing sensor is installed so that the sensor maintains the correct clearance with the speed-timing wheel. If the correct clearance is not maintained, the signal from the sensor will not be generated.Do not install the sensor between the teeth of the speed-timing wheel. Damage to the sensor would result. Before installing the sensor, ensure that a tooth of the wheel is visible in the mounting hole for the sensor.
Install the engine speed/timing sensor.
Ensure that a tooth on the speed-timing wheel is visible in the mounting hole for the sensor.
Extend the slip head (2) by a minimum of 4 mm (0.16 inch).
Coat the threads of the sensor with 4C-5597 Anti-Seize Compound .Note: The slip head is designed to contact a tooth during the first revolution of the speed-timing wheel. For the maximum allowable clearance between the slip head and the tooth, refer to the engine Specifications manual.
Install the sensor. Tighten the locknut to 40 5 N m (30 4 lb ft).