口述13-1

Please speak out four fixed parts of the main engine and how do you maintain them.请说出主机的四个固定部件以及你如何保养它们。
The fixed parts of the main engine includes bedplate, cylinder liner, cylinder head, main bearing and so on. The maintenance work of the fixed parts of the main engine is as follows: (1) Check holding-down bolt tension; (2) Check and measure the wear of the cylinder liner; (3) Clean the lubrication grooves; (4) Inspect combustion chamber; (5) Clean sealing face for the fuel injectors in the cylinder head; (6) Inspect main bearings and lower bearing shells; (7) Check and measure wear and clearance of the main bearings and so on. 主机的固定部件包括机座、缸套，缸头，主轴承等等。 主机固定部件的维护工作如下：1、检查压紧螺栓张力；2、检查并测量缸套的磨损程度；3、清理润滑油槽；4、检查燃烧室；5、清理缸头喷油器的密封面；6、检查主轴承和下轴瓦；7、检查并测量主轴承的磨损和轴承间隙等等。