1. Make sure the sensor is touching the sight glass tube and is secured in place by the two black lock nuts.
2. Plug the sensor into the Control Unit.
3. Plug the Control Unit in and turn on the power. If the loader runs and shuts off when material builds up in front of the sensor, you need no adjustment.
4. If the loader does not run, turn the adjustment screw located on the back side of the sensor with the screw driver provided counterclockwise until the loader starts to load.
5. The loader should turn off as material builds up in front of the sensor.
6. If the loader continues to run after material builds up in front of the sensor, turn the adjustment screw clockwise slowly until the loader shuts off.

NOTE: Some units were equipped with a ground wire, make sure the green ground wire is attached to the back of the sensor and secured under a mounting plate hold down screw or attached to your machine.