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If you need data of valve clearance gap of the diesel generator, you can check on the operation and maintenance manual. If still can not find, try to ask your supplier whom supplies the diesel generator to you.
If you need to have a generator set in future, please refer to www.dieselgeneratortech.com.
From the manual these are the protection circuits.
• Engine protection: low oil pressure, high engine temperature.
• Genset protection: under/over voltage, overload, battery charger failure, battery voltage out of limits,
under/over frequency, start failure.
• Circuit breaker protection: IV poles.
• Differential protection.
Any one of them will trip the fuel relay closed. What you may be able to do is disconnect one at a time each protection circuit and see when the fuel relay opens. (Make sure to reconnect each one if it had no effect on the fuel solenoid)
Once you isolate which circuit it is in then you can chase wires or change the bad switch.
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