NEWS

01 When an abnormal noise is heard while the diesel engine is running, the first step is to pinpoint the source of the sound—for instance, whether it originates from inside the valve chamber, within the engine block, near the front cover plate, at the junction between the generator and the diesel engine, or inside the cylinder. Once the specific location has been identified, a diagnosis should be made based on the operating principles of the diesel engine.
02 If the abnormal noise appears to originate from inside the engine block, the engine should be shut down immediately. Remove the side cover plate of the engine block and manually push against the middle section of the connecting rod. If the noise appears to come from the upper part of the connecting rod during this process, it can be concluded that there is a fault involving the piston or the connecting rod bushing. Conversely, if the noise is detected in the lower part of the connecting rod while rocking it, it can be concluded that the clearance between the connecting rod bearing and the crankshaft journal is excessive, or that the crankshaft itself is defective.
03 If the abnormal noise is heard in the upper section of the engine block or inside the valve chamber, the cause is likely improper valve clearance adjustment, a broken valve spring, a loose rocker arm pedestal, or a valve pushrod that is not properly seated in the center of the tappet.
04 If the abnormal noise is heard near the front cover plate of the diesel engine, it is generally indicative of excessive clearance between various gears, loose gear fastening nuts, or a specific gear suffering from damaged teeth.
05 If the abnormal noise originates from the junction between the diesel engine and the generator, the cause is likely a fault with the internal sealing ring (gasket) at the interface between the two components.
06 If the abnormal noise emanates from inside the cylinder, it can be concluded that the fuel injection timing (advance angle) has been set incorrectly, or that the wear-induced clearance between the piston and the cylinder liner has become excessive.
07 If a rotational sound is still heard coming from inside the generator after the diesel engine has been shut down, it suggests a potential issue with the generator's internal bearings or that a specific pin has come loose.