求翻译：启动油泵电机，对油缸升压试验，溢流阀调至6Mpa，电接点压力表调至4-5Mpa，然后卸压检查液压系统是否正常，压力表是否灵敏，液压系统接头处是否漏油。是什么意思？

Start the pump motor, fuel tank booster test, relief valve adjustment to 6Mpa, moved to 4-5Mpa of electric contact pressure gauge, and pressure relief hydraulic system for checking whether normal, the pressure gauge is sensitive, joint oil leakage of the hydraulic system.