How should common trailer axles be maintained?

Axle is one of the important parts on the semi-trailer, to fully protect the attendance, safety and economic efficiency of the semi-trailer in the long-distance journey, it is vital to choose a high-quality axle.

Nowadays, lightweight has gradually become a trend in the semi-trailer industry, and more and more owners prefer to choose those products with stable performance and lighter weight when they purchase semi-trailers or accessories. To three axle semi-trailer, for example, its axle weight almost accounts for about 20% of the total weight, therefore, axle weight reduction is an important way to achieve the weight reduction of the trailer.

So, a semi-trailer axle weight in about how much?

In fact, this issue also specific analysis, to the market's most widely used conventional 13t drum axle for example, its weight is generally in about 340kg, different manufacturers produce axles more or less will also exist a certain difference. In addition, different models, tonnage and configuration will also affect the weight of the axle, such as some of the main lightweight axle its weight is also less than the ordinary model axle.

Semi-trailer axle generally belongs to the support bridge, does not have steering or driving function, its structure also looks relatively simple. However, the axle is related to the semi-trailer load-bearing, braking and driving, the composition of parts is up to hundreds, not only the strength, toughness and other high requirements, there are also high requirements for precision. Therefore, do a good job of daily maintenance and maintenance is very critical.

Generally speaking, the trailer every 50,000 kilometers, you need to do a maintenance of wheel bearings. Then how should the maintenance be done?

1、Clean up the old grease. Remove the wheel hub, clean the bearing, journal and hub cavity, scrape off the old grease, then wipe it clean with cleaning agent or diesel oil, then wash it with clean water and dry the inner cavity of the wheel hub with a clean rag.

2、Check the bearing and seat ring. After the cleaning is completed, check the wheel hub bearing and bearing seat ring, and replace the bearing in time if cracks, fatigue spalling, loose rollers and other phenomena are found.

3、Check the bearing fit clearance. Check the fit of bearing inner diameter and journal, the fit clearance should be no more than 0.1mm, the measuring part should be two positions above and below the vertical ground of shaft diameter, the place is the maximum wear position, the bearing should be replaced when the fit clearance is exceeded.

4、Apply grease. Fill the gap between the inner seat ring and the cage roller of the bearing with new grease, and apply a thin layer of grease on the inner and outer surface of the bearing. A thin layer of grease inside the hub cavity and inside the axle head cover can play an anti-rust role, but not too much, otherwise it will easily affect heat dissipation or braking. Finally, the hub can be installed.

Some owners may buy maintenance-free axles, according to the manufacturer's propaganda, this kind of axle maintenance cycle can reach 30W or 50W km. It is worth noting that maintenance-free axle ≠ inspection-free axle, although its maintenance interval is extended, daily inspection and maintenance are still essential. Every once in a while, you have to open the axle to see the operation condition of key parts to ensure that the bearings, hubs, etc. maintain good performance output.

1, regularly check the wheel hub fasteners, to see if there is loose or oil leakage phenomenon.

2、Regularly observe whether the gear oil is above the normal level, and whether it is contaminated. If the lubricant is not dark, such as showing white or milky white, it means that the lubricant is contaminated.

3、Every 12 months or 100,000 kilometers, the wheels should be set up to check whether there is any strange noise in the rotation and whether the bearings are shaking.

4、Every 12 months or 100,000 kilometers, open the oil injection hole and use the magnet probe to reach into the lubricant to check whether there are iron filings and impurities.

5、Add or replace the lubricant regularly.

It is recommended that owners should determine the maintenance cycle of the axle according to the comprehensive use conditions of their vehicles, especially heavy-duty semi-trailers, the maintenance cycle should be shortened.

In addition, is to choose the right axle, drum or, disc or, lightweight or, anti-heavy-duty or, regardless of how the manufacturer propaganda, only fully meet their own needs of the use of axles, in order to operate on the income with half the effort. In addition, is the choice of quality reliable brand, reliable does not mean that you must pay the brand premium, the market cost-effective axle brand is also a lot, the owners can start from the strength, experience, technology, etc. to do a good job of investigation, compared to three, choose the best price cheaper products.