Diesel generator set in use may appear three leaks, that is, diesel oil leakage, water leakage, air leakage.  Its specific harm is as follows:  

1. Increased oil consumption, wasted energy and increased operating costs;  

2, accelerate the mechanical parts wear, the deterioration of the technical state, power decline;  

3, shorten the service life of mechanical parts, increase the repair cost;  

4, prone to accidents;  

5, affect the cleanliness of the machine;  

6. Pollute the environment.