介绍MAN 公司的A 55 型后置发动机客车底盘的液力风扇系统的结构、工作原理、工作过程及故障检修。 关键词: 客车底盘 发动机后置 液力风扇 检修 MAN A 55 Abstract: Th is paper int roduces the st ructure, wo rk ing p rincip les, wo rk ing p rocess of the hydraulic fan driving system ofMAN A 55 bus chassis w ith rear2mounted engine and its t roubles shoo t ing. Key words:Bus chassis, Rear2mounted engine, Hydraulic fan drive, T rouble shoo t ing, MAN A 55