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How to maintain the dung sucking universal joint cross shaft needle roller bearings, bearings knowledge

by:Waxing     2020-06-02
Dung sucking, pollution and so on automobile drive shaft universal joint cross shaft needle bearing should be used gear oil lubrication, but in the actual maintenance we often found that many users of the drive shaft universal joint cross shaft needle roller bearing is used calcium base grease ( Commonly known as butter) To lubrication, in fact, this way of lubrication is wrong, it will lead to a large number of cross shaft needle bearing early damage. In the disassembly process we can see clearly the cross shaft journal presents the squeezed groove, journal and needle in seriously short of oil. Appear this kind of phenomenon is mainly due to the universal joint cross shaft needle bearing lubricating oil mouth is a common grease nipple, so to cause people an illusion, for a long time common filling butter to lubrication. In fact, from the nozzle with grease gun is difficult to mix the butter filling on the needle roller bearing, because the viscosity of the butter, when using grease gun from the nozzle to the universal joint cross shaft needle roller bearing inner cavity loaded with butter, butter into the oil duct stenosis lumen resistance increase, butter across the open pressure nozzle pressure reducing valve and overflow, so will give people an illusion, thought to fill. Instead of butter didn't even enter the needle between, to the cross shaft journal is face is also very difficult. When remove the maintenance, the force method is used to apply butter on a needle roller and shaft neck surface also can have some lubrication effect, but for the spider needle bearing lubrication effect, calcium base grease is much less than the gear oil well, the reason is as follows: u universal joint in the work to sustain large torsion and alternating load, and calcium base grease oil film tenacity is poorer, the bearing and shaft friction surface is difficult to form a good film. Taken the universal joint cross shaft turn needle roller bearing in the work can only be in situ, not along the steel bowl and cross axis neck rotation, and calcium base grease roll is very poor, so when the oil film can't immediately form new oil film was damaged. Taken the calcium base grease is a mixture of calcium soap and lubricating oil, due to the deterioration of lubricating oil in use and evaporation, the grease into a hard calcium soap and calcium soap itself not only cannot have the lubrication effect, but also hindered the needle on the journal of rolling, with universal joint cross shaft and there is no discharge of oil measures, changed neither discharge grease, new oil and it is difficult to injection, thus greatly accelerate the universal joint cross shaft needle roller bearing wear. In order to change this kind of use butter instead of gear oil for lubrication of universal joint cross shaft erroneous practice of needle roller bearings, small make up below the recommended maintenance methods, to improve the service life of universal joint cross shaft needle roller bearing. After u remove the universal joint cross shaft needle bearing a thorough cleaning, remove all remaining grease ( Available water or in gasoline cleaning) After 2 min - in the gear oil L0min, can use. Driving in use should be paid attention to: auto wading after new oil should be replaced in a timely manner. Dung sucking, pollution, car and other cars in the range of 2000 km 3500 km a new oil should be changed. The advantage is, can make the universal joint cross shaft needle roller bearing longevity 2 times Three times. U can be with special hydraulic filling equipment, was carried out on the drive shaft universal joint cross shaft needle bearing lubrication on a regular basis.
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