五级驾驶员1.在机车上如何检查柱塞副、出油阀副和喷油嘴偶件的磨损程度?2.怎样进行柱塞式喷油泵的正确拆装?3.何谓气缸存气间隙?气缸存气间隙大、小对发动机工作有何影响?影响存气间隙的因素有哪些?怎样在车上进行检查?4.什么叫向心轴承、推力轴承、向心推力轴承?5.了解滚动轴承代号的含义。6.拖拉机常用油封有哪两大类?它们的使用特点怎样?了解几种主要油封的规格。 Five drivers 1. In the locomotive how to check the plunger pair, the valve and the fuel injection nozzle even the degree of wear and tear 2. How to carry out the correct plunger plunger pump assembly and disassembly? 3. What is the cylinder air gap Cylinder air gap big and small, the impact on the engine work What are the factors that affect the air gap? How to check the car? 4 What is the radial bearings, thrust bearings, radial thrust bearings? Rolling bearing code meaning. 6. What are the two major types of tractors commonly used oil seal? What are the characteristics of their use? To understand the specifications of several major oil seals.