Summer wheel maintenance tips

The hot summer has arrived, and the high temperature has led to the peak period of truck maintenance, especially the high temperature of the hub bearings has greatly reduced the service life of the hub grease. After entering the summer, regular maintenance of the hub bearings is required. So what kind of results will some improper maintenance methods lead to when maintaining wheel bearings?

● Hub maintenance Full hub lubrication is a thing of the past

Many users will use full hub lubrication under the guidance of master masters and "repair shop masters" when maintaining wheel hub bearings. Full hub lubrication is the practice of filling the cavity in the hub with grease.

Many years ago, calcium-based grease and ordinary lithium-based grease were commonly used for maintenance of truck bearings. These two greases have poor high temperature resistance and wear resistance, especially after long-term high-load operation, these two greases will fail at high temperatures. Conditions that lead to bearing burnout. In this case, the master craftsmen used their brains to come up with a way, that is, to lubricate the hub fully, and fill the cavity in the hub with butter, so that when the bearing is high temperature caused by long-term high load, the hub cavity will The butter will flow out and continue to lubricate the bearings.

● The risk of full hub lubrication is high, which can easily cause fire

Although this method avoided the situation of bearing burning, it caused more serious things to happen. Full hub lubrication Excess grease will not participate in the bearing lubrication process, but will cause poor heat dissipation.

Especially in summer, when the ambient temperature rises and the temperature of the brake drum increases due to brake friction, the high temperature will accelerate the deterioration of the butter and become a fluid state. After being heated and expanded, it will squeeze the oil seal and cause damage. have very serious consequences. When the liquid butter flows into the high-temperature brake drum, it will quickly vaporize. After the temperature reaches the self-ignition point, the wind brought by the vehicle is enough to ignite the vaporized butter, which will cause the vehicle to catch fire.

● Melted butter at high temperature causes brake failure

At the same time, the fluid butter flowing into the brake pot will also cause brake failure. Because butter has very good lubricating properties, after flowing into the brake pot, the friction between the brake shoe and the brake pot will be greatly reduced, which in turn will lead to brake failure. . Especially for bicycles, as long as one of the rear wheels has grease leakage, it will cause partial braking, and it is very easy to cause rollover during emergency braking. The result of simultaneous grease leakage on both sides is that the brakes will directly fail.

● Moderate amount is enough, too much is not beneficial

At present, the variety and quality of butter has been greatly improved compared with the early years, and it is more resistant to high temperature and wear. It is only necessary to apply an appropriate amount of butter on the wheel hub bearings during maintenance to meet the demand. It is no longer necessary to adopt the method of full-hub lubrication. The high oil consumption and waste of materials caused by the increased rolling resistance of full-hub lubrication is also a considerable expense, and it will also lead to the occurrence of the above-mentioned dangerous situations.

How to make the vehicle operate safely while creating the greatest benefit is the ultimate goal. According to the operating environment of the vehicle, choosing the appropriate grease and adopting the correct maintenance method can not only greatly reduce maintenance costs and create more profits, but also Reduce potential danger and let you travel thousands of miles with peace of mind.

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