What to do about oil seal leaking from axle of semi trailer?

Oil seal is a common name for general seals. Simply put, it is the sealing of lubricating oil. Its main function is to seal oil, isolate the parts that need lubrication in the transmission parts and the output parts, so as not to let lubricating oil leak. When the oil seal is working normally, there is usually an oil slick between the lip and the shaft, which plays the role of sealing and lubrication.

On the semi-trailer, there are many types of oil seals. According to the different installation positions, it can be generally divided into engine crankshaft oil seals, transmission shaft oil seals, transmission secondary box oil seals, inter-axle differential oil seals, wheel rim hub oil seals, wheel rim half shaft oil seals, kingpin oil seals, brake bottom plate oil seals, etc.

Relatively speaking, these types of oil seal, trailer axle oil seal is the most prone to oil leakage failure. Especially, as a heavy transport vehicle, the road conditions of the semi-trailer are more complex. The mud, dust, rain and snow or snow melting agent on the road surface are often easy to splash on the axle, leading to serious oil seal pollution and reducing the service life.

Because the phenomenon of trailer axle oil leakage is more common, many owners are not very concerned about this phenomenon, not to mention timely repair. In fact, the oil leakage of the axle seal is a dangerous failure. If the oil leakage is serious, it is likely to lead to spontaneous combustion of the vehicle. Do not feel that it is alarmist. In addition, the oil leakage of the axle seal will seriously affect the performance of the vehicle, leading to damage of related parts and components, threatening driving safety.

In general, there are five factors that lead to oil leakage from the trailer axle seal:

1. Oil seal.

Oil seal factors, there are mainly two aspects, one is that the quality of oil seal is originally unqualified, inferior oil seal, naturally in use can not produce enough lubrication or sealing effect; Another is that the oil seal has not been replaced for too long, leading to the embrittlement phenomenon of the oil seal, and the decrease of sealing and ductility.

For the problem of oil seal quality, owners need to polish their eyes when choosing products to avoid buying inferior oil seals; For the problem of oil seal embrittlement, it is necessary to replace the new oil seal in time.

2. Axis of rotation.

Especially when the surface of the rotating shaft becomes rough, or there are rust spots, rust or burrs and other defects, it is easy to lead to oil seal oil leakage. At this time, it is necessary to carefully polish the oil seal with fine gauze, and then install the oil seal, and smear the appropriate amount of lubrication grease at the corresponding position of the lip or shaft diameter.

3. Oil products.

It is worth noting that when replacing oil products, we must choose the same lubricating oil.

When adding lubricating oil, do not add too much, and do not plug the vent, otherwise the high-speed operation of the vehicle will lead to internal pressure exceeding the sealing working pressure of the oil seal, resulting in oil leakage phenomenon.

In addition, if the internal impurities of the lubricating oil are too much, or there is alloy powder, metal iron filings, it is necessary to replace the new oil in a timely and thorough manner to prevent oil seal damage.

4. Improper installation.

When installing oil seal, if there is a special tool, must use special tools, do not use a hammer hard, to prevent the oil seal deformation or break the spring; If lip flanging, spring off or oil seal skew occurs during installation, it must be removed and reinstalled.

5. Internal parts fail.

When the internal parts of the oil seal have problems, the oil seal will also lead to oil leakage. At this time, only replacing the oil seal can not eliminate the oil leakage fault. It is necessary to carefully inspect the vehicle to find out the cause of the fault in order to remove the oil leakage fault.

Although the failure of axle oil seal oil leakage is more common, and the reasons for oil seal oil leakage are also more numerous, it is usually easier to eliminate. In addition to the usual attention to the inspection and maintenance of the vehicle, the choice of reliable quality trailer axle is also very key. For example, DARO trailer axle, in addition to the casting of the shaft body choose more solid, more resistant to heavy duty "one-piece" shaft body, in the choice of oil seal using heavy transport vehicle special oil seal, sealing performance is better, stronger pollution resistance, service life is longer than ordinary oil seal, can help the owner to improve the operation efficiency, reduce the frequency of replacement, fully reduce consumption and increase efficiency.