The repair and maintenance of the diesel generator unit is to ensure the diesel generator unit's integrity and safe operation, and to ensure its timely operation and normal power supply in the event of a power outage. Scope of application routine maintenance of diesel generator diesel generator check water level and oil level once a week clean up the external surface and room environment once a week. Monthly maintenance of the diesel generator, cleaning the external surface of the unit, checking whether the speed control rod is flexible and lubricating the connections, changing the cooling water, measuring the PH value before and after the replacement (normal value is 7.5-9) , and making a measurement record, (inform the water treatment workers to cooperate) ; check the tension of the fan belt and the charger belt, adjust if necessary; cooperate with the electrical work emergency power generation test, check whether the reading, temperature and loudness of the instruments are normal when the diesel engine is running, and make a running record. Check the diesel generator flow resistance indicator and clean the air filter when it is shown in red, drain the stagnant water and clean the first stage diesel filter; Attention should be paid to lubricating fan pulleys and belt tensioning wheel bearings, checking the oil level of overspeed mechanical protection devices and refueling when it is insufficient, annual maintenance of the diesel generator group, working in conjunction with electricians for combined load operation, check operation; cooperate with electrical simulation test of the performance of the safety protection device; test axis, open file, and make a record; Clean the cooling system (inform the water treatment worker) , check the oil quality, change the oil if necessary, clean the second stage diesel oil filter, clean the oil filter, clean the oil filter, clean the oil filter, clean the oil filter, clean the oil filter, clean the oil filter, clean the oil filter, clean the oil filter, clean the oil filter,