长时间不正确使用主离合器,会使摩擦片极剧磨损,发动机动力传递能力降低,造成起步困难.同时,还会引起分离轴承的早期磨损和损坏.因此,必须改变使用拖拉机主离合器的不良习惯. Improper use of the main clutch for a long period of time will result in a drastic wear of the friction plate and a reduction of the power transmission capability of the engine resulting in difficulty in starting up and causing early wear and tear of the split bearing and therefore the bad habits of using the main clutch of the tractor must be changed .