Although I haved tried and tested all the electrical circuits,protections and operational controls in the generator but I still could not get the best output.

I still having problem with the Frequency flucuation of 48Hz - 53Hz which it's suppose to be steady at 50Hz when the load increases. I did suspected the fuel circulation.

Can I have some possible answers to it,Please?

Have you contacted Caterpillar yet?

Check AVR