AHV380 vibrator is widely used in overseas exploration projects,and its circuit system is powered by 12 volts generators.The 12 volts generator is mounted on the engine and driven by a pulley.Because the vibrator is equipped with all kinds of electrical appliances such as the whole car light,electronic control box,radio,navi-gation system,etc.,when the vibrator is running,the generator is basically working under full load.In addi-tion,the working environment of exploration projects is harsh,and the working mode is generally 24 h continu-ous running.Large loads and harsh environments lead to a very high generator failure rate,and mechanics lack systematic knowledge when repairing damaged generators,and the recovery rate is extremely low.The Delco Re-my 30 SI generator is one of the more commonly used generators.This paper mainly analyzes the working princi-ple of Delco Remy 30SI,and explores the fault analysis and maintenance methods of generators.