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Common faults of diesel generators and how to deal with them

July 27, 2022
   A, diesel generator can not start:
  1, check whether the battery reaches the rated voltage 2, check the battery internal water acid composition loss 3, check whether the charger is used normally, if bad, the situation is urgent, it is generally recommended to replace the battery, the battery after a long time, or battery capacity has seriously decreased, even if it reaches the rated voltage can not start, then the starting battery must be replaced. 4, check the battery terminals and connecting cable Whether poor contact, battery electrolyte in the usual maintenance, such as replenishing too much, easy to overflow the surface of the battery, corrosion of the terminals, increasing the contact resistance, so that the cable connection is poor, after processing the re-tightening screws, full contact can be. 5, check whether the positive and negative cables of the starter motor is not firmly wired, the generator will run vibration to make the wiring slack, resulting in poor contact, to determine the operation of the starter motor The situation, you can start the engine at the moment, touch the starter motor shell with your hand, such as the starter motor is not moving and the shell is cold, that the motor is not working, or the starter motor is seriously hot, or an irritating burnt smell, the motor coil has been burned, the need to repair or replace the motor. 6, the fuel system into the air caused, which is often encountered in the failure, usually when replacing the fuel filter core Improper handling (such as replacing the fuel filter core without exhaust work) caused by air entry, air with the fuel into the pipeline to reduce the fuel content of the pipeline, the pressure is reduced, the pressure is not enough to open the injector nozzle does not reach the specified high-pressure fuel injection atomization lead to the engine can not start, at this time must be exhaust treatment.
  Second, the cooling water temperature is too high:
  1, usually caused by the surface of the cooling water tank radiator is not clean, or in the operation of the unit there are debris is sucked by the cooling fan to the tank to block the ventilation and make the radiator bad, daily to maintain a clean environment in the engine room is particularly important. 2, the cooling water tank, coolant is not enough, you need to promptly check the reasons for the loss of cooling water, you can check the cooling water tank and the body of each cooling water pipeline has no leakage, if there is a leak. 3, the generator in use for a longer period of time, the radiator fan belt will gradually aging, become inelastic or a belt break caused by the loss of normal cooling fan blowing ability, replacement of the belt needs to replace several together, the usual maintenance of the cooling fan pulley, bearing enough lubricant. 4, the cooling water tank, coolant is insufficient, this is due to 5, the thermostat failure can not open, so that the cooling water temperature change can not change the cooling water circulation path, control the flow of cooling water into the cooling water tank, to achieve the purpose of adjusting the cooling intensity, it is necessary to replace the thermostat. 6, the use of non-conforming Cooling water, so that the cooling pipe accumulation of scale, rust and other debris impede the circulation of cooling water, causing water temperature rise, to use qualified tap water, preferably distilled water, deionized water or pure water.
  Third, the generator exhaust black smoke:
  1, the use of poor quality fuel, containing impurities, blocking the injector nozzle, so that the cylinder fuel can not be completely burned, causing black smoke, in addition to the engine injector nozzle, the pressure of fuel injection, some fine hard magazine will scratch the inner wall of the injector nozzle, the injector nozzle was scratched after the change in the precision of fuel injection, damage to the injector nozzle, the engine is very harmful, such as the injector nozzle was scratched, even if the use of qualified fuel will also smoke . Therefore, the quality of fuel must be a good gate, the choice of qualified fuel is conducive to engine life. 2, the environment is dusty and impurities, the air filter is severely clogged, the air intake filter blockage caused by cylinder combustion air shortage, incomplete combustion, to clean or replace the air filter, and maintain a clean environment. 3, the engine injection timing is not correct, the work of each cylinder of the engine is dependent on its injection Time calibration, that is, the piston in the process of doing the movement and the time difference between the two corresponding to the oil injection will cause incomplete combustion, there will be black smoke, because the timing of the calibration requires strong technology, it is recommended to contact the manufacturer to adjust the engine's injection timing and valve clearance.
  Fourth, the generator exhaust blue smoke:
  1, generally too much oil in the filter (i.e., too much oil added at the time of maintenance) caused by reducing the oil to the specified level can be solved. 2, piston ring seized or wear too much, insufficient flexibility, so that the oil leaks into the combustion, which requires contact manufacturers to clean the piston ring or replace the leaking part of the piston ring.
  Five, the generator exhaust white smoke:
  1, the fuel system contains water caused by the bottom of the reservoir can be discharged to see if there is water. 2, cylinder valve wear on the airflow changes, which will, with a smoke ring of white smoke, then you must replace the worn parts. 3, fuel injection nozzle spray atomization is poor, diesel droplets in the combustion chamber is not burned, it is recommended to contact the manufacturer to check the fuel injection nozzle, adjust to the specified injection pressure.