GAUGE GP-A 3842804 - Caterpillar

Illustration 1 g00821848
(1) Engine speed/timing sensor
(2) Locknut
(3) Gasket
Remove engine speed/timing sensor (1). Inspect the condition of the end of the sensor. Look for signs of wear and contaminants.
Clean any debris from the face of the sensor.
Install sensor (1) and gasket (3) into the cover. Thread the sensor into the cover until the sensor contacts the timing disc. Unscrew the sensor for 1/2 1/10 turn (180 36 degrees) in order to obtain a clearance of 0.71 0.14 mm (0.028 0.006 inch) between the sensor and the timing disc. Hold the sensor in place and tighten locknut (2) according to the engine's Specifications.