Universal joint cross shaft coated with grease
Calcium-based grease used in drive shaft expansion sleeve key teeth and intermediate bearings, three-axis drive rear axle drive shaft cross shaft and intermediate bearings are key bearings using gear oil Three-axis drive rear axle drive shaft cross shaft and intermediate bearing needle bearings And intermediate bearings use gear oil. In the absence of a filling machine, some maintenance personnel accidentally applied calcium-based grease to the cross-axis needle roller bearings for convenience, causing many cross-axis bearings to fail prematurely. Since the mouth of the universal joint cross shaft for filling gear oil is a very common grease nipple, it often causes a misunderstanding. In fact, butter cannot be filled on the needle roller bearing. Due to the high viscosity of butter, when using a grease gun to add butter to the inner cavity of the cross shaft through the oil nozzle, the resistance of the butter entering the narrow inner oil groove is very large. The repairman mistakenly believes that the bearing has been filled with oil. In fact, not only the butter cannot enter between the needle rollers, but it is also difficult to reach the end face of the cross journal.
The correct method: the practice of lubricating the universal joint cross shaft with butter instead of gear oil should be changed, and the gear oil should be filled with a gear oil pressure gun.
误区： 万向节十字轴涂有润滑脂。
传动轴伸缩套键齿和中间轴承采用的钙基脂，三轴驱动后桥传动轴十字轴和中间为关键轴承采用齿轮油三轴驱动车后桥传动轴的十字轴和中间轴承的滚针轴承和中间轴承采用齿轮油。在没有加注机械的情况下，一些维修人员为了方便，不慎在交叉轴滚针轴承上涂上了钙基润滑脂，导致很多交叉轴轴承过早失效。 由于万向节十字轴加注齿轮油的嘴是一只很普通的黄油嘴，往往给人造成一个误会，事实上黄油是加注不到滚针轴承上的。因为黄油粘度大，当用黄油枪通过油嘴向十字轴内腔加黄油时，黄油进入狭窄内油槽油道的阻力很大，这时黄油靠压力会顶开油嘴对面的减压阀而溢出，这使修理工误认为已给轴承加满油，事实上黄油不仅不能进入滚针之间，就是到达十字轴颈端面也是较困难的。
正确的方法：应改变用黄油代替齿轮油润滑万向节十字轴的做法，应用齿轮油压力枪加注齿轮油。
ZhongLingLube
Shanghai Zhongling Lubricating Grease Co., Ltd. 上海中菱润滑油脂有限公司
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