Caterpillar — Testing and Adjusting Section

A Caterpillar service procedure — check it applies to your exact model before use.

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Procedure

1. 4. Turn the voltage adjustment (1) on the regulator
2. 1. Adjust the generator frequency for 60 Hz.
3. 2. Turn the knee frequency adjustment (1) fully
4. 3. Turn the voltage adjustment (2) until the voltage
5. 4. Slowly turn the knee frequency adjustment
6. 5. Turn the knee frequency adjustment (1) CCW
7. 6.
8. 7. Start the generator.
9. 8. Run the generator at no load.
10. 9. Decrease the engine RPM and observe the
11. 1. Adjust the generator frequency for 50 Hz.
12. 2. Turn the knee frequency adjustment (1) fully
13. 3. Turn the voltage adjustment (2) until the voltage
14. 4. Slowly turn the knee frequency adjustment
15. 5. Turn the knee frequency adjustment (1) CCW
16. 6.
17. 7. Start the generator.
18. 8. Run the generator at no load.
19. 9. Decrease the engine RPM and observe the

Source: manual:CAT VR6 Service Manual.pdf. Figures and steps are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.