Car maintenance, some owners in the cozy drive shaft when will use butter to grease, but in fact it will accelerate cross shaft rolling bearing early damage, it is what reason is caused? And what is the maintenance method correct? Don't worry, the following one one for you.

Because the cardan shaft needle bearing lubricating nipples is a common butter mouth. Because of the high viscosity of the butter, when from the nozzle to the universal joint cross shaft needle bearing inner cavity filled with butter, the butter into the narrow cavity oil passage with grease gun resistance increased, the grease pressure rise high top open across the choke valve and overflow. This phenomenon can easily be mistaken for butter up reason.

Actually butter did not even enter between the needle rollers, remove the service, by compulsory means the butter smeared on the needle roller and shaft neck appearance may play a role in a number of lubrication, so the selection of gear oil, the effect will be better. This is because:

Calcium base grease is composed of a lubricating oil and calcium soap mixed use due to the transformation and the evaporation of the lubricating oil, grease into a hard calcium soap and calcium soap itself not only can not play to lubrication, but also hinder the needle on the shaft neck of rolling, on the cardan shaft and no oil drainage measures, change the qualitative grease can not discharge, new oil and it is difficult to inject, thus greatly accelerating the cardan shaft needle bearing wear.

Cardan shaft of the needle roller bearings at work can only situ rotation, not along the steel bowl and the cross axle neck rotation, and calcium base grease rolling is very poor, so when the oil film is destroyed not immediately formed a new film.

Universal joint in work to bear large torque and alternating load, and calcium base grease oil film tough poor level, bearing and shaft neck of the friction surface is difficult to form a good film.

With gear oil should pay attention should be removed first, under the cardan shaft needle bearing after a thorough cleaning, the residual grease all cleared and put it into gear oil soaked 2min~l0min can be loaded with. Attention should be paid to the use of the car, after wading driving the timely replacement of the new oil. Driving 2000km~3500km should replace a new oil. Conditions of the owners can be equipped with a special hydraulic filling equipment, the drive shaft universal joint cross shaft needle bearing lubricated periodically.

By using the method of curing, it can effectively prolong the service life of the bearing, the bearing fault is reduced.