EXTENSION GP-FAN 4200291 - Caterpillar

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Install the voltage regulator. Refer to the installation instructions. See the Testing and Adjusting, "Wiring Diagrams".
Start the engine.
Run the engine at rated engine RPM and at no load.
Turn the knee frequency adjustment counterclockwise (CCW).
Adjust the voltage level. Refer to the Testing and Adjusting, "Voltage - Adjust".
Adjust the knee frequency. Refer to the Testing and Adjusting, "Knee Frequency - Adjust".
Adjust stability. Refer to the Testing and Adjusting, "Stability - Adjust".
Return the genset to normal operation.
Add load to the genset.
Slightly reduce the frequency of the genset. Generator voltage should decrease proportionally with the frequency. Otherwise, readjust the knee frequency again.
Increase the frequency to the rated frequency.