SFWR GP-A3000 3668816 - Caterpillar

Active Speed Sensor
The engine speed sensor sends the engine speed signal to the engine speed switch and to the transmitter.
Adjust the sensor's clearance from the flywheel.
The engine is secured. Install the sensor until the sensor contacts the flywheel.
Back off the sensor (3 0.1 turns).
Measure clearance between the flywheel and the electronic sensor. The clearance should be 1.55 mm (0.061 inch) to 1.83 mm (0.072 inch).
Tighten the locknut to a torque of 45 7 N m (33 5 lb ft).Passive Speed Sensor
The engine speed sensor sends the engine speed signal to the engine speed switch and to the transmitter.
Illustration 1 g00562936
Adjust the sensor's clearance from the flywheel.
The engine is secured. Install the sensor until the sensor contacts the flywheel.
Back off the sensor (2.5 0.1 turns).
Measure clearance between the flywheel and the electronic sensor (1). The clearance should be 1.55 mm (0.061 inch) to 1.83 mm (0.072 inch).
Tighten locknut (2) to a torque of 45 7 N m (33 5 lb ft).