How to do "foot care" for excavator final drives

If the excavator is likened to a person, the walking part of the excavator is equivalent to a human leg. Therefore, the walking parts of the excavator are very important originals, and we need to carefully maintain them to ensure that it works well.

Many excavator bosses have a misunderstanding in their understanding. "Hydraulic excavators are mainly used for excavation work, and rarely travel motors long distances without maintenance of the lower walking body."

However, when the lower traveling body fails, it costs a lot of repair costs. The headache is that it causes considerable downtime. In order to reduce the loss of operation and repair costs caused by the shutdown, attention should be paid to the maintenance and inspection of the lower traveling body.

◆ Is the bolt loose?

◆Is the carrier roller and the roller can't rotate?

◆Is the sprocket wheel, the roller and the final drive motors wheel leaking oil?

If you ignore the above abnormal state, it will eventually lead to serious accidents. If the bolt is damaged and the related parts are damaged and the carrier roller or the roller is worn away, the maintenance cost will be greatly increased.

Appropriate adjustment of track tension should be based on soil quality

The soil quality of different construction sites will vary. The track tension should be adjusted in conjunction with the soil to extend the life of the machine.

◆When the soil is soft, the clay and the rail link are easy to adhere to the soil. Therefore, the track should be slightly looser to prevent the abnormal stress applied to the rail link due to the adhesion of the soil.

◆ When the construction site is spread over the pebbles, the track should be slightly looser, so that when walking on the pebbles, the bending of the track shoes can be avoided.

◆ It is best to adjust the track slightly tighter on a firm and flat floor.

Track tension adjustment

If the track is too tight, there will be a phenomenon that the walking speed and the running power are degraded. This not only causes a drop in work efficiency, but also causes abnormal wear due to excessive friction applied to the pin and bushing.

Conversely, if the track is too loose, the track rests loosely on the drive and carrier wheels, causing more wear or damage. Moreover, when the loose track sag is too large, contact with the frame may occur and the frame may be damaged. Thus, even if the reinforced lower traveling body is not properly adjusted, an unexpected failure may occur.

Maintenance methods to reduce wear:

The carrier roller, the roller, the drive wheel and the rail link will have a certain degree of wear during long-term operation. However, depending on whether the daily inspection is carried out or not, there will be a large difference. Therefore, as long as it takes a little time to perform proper maintenance, the degree of wear can be well controlled.

◆If some of the carrier rollers and the roller are not working, the roller may be worn off and the rail links may be worn. If you find a roller that cannot be operated, you must repair it immediately! In this way, other failures can be avoided.

◆ If you repeatedly walk on the inclined ground for a long time and suddenly turn, the side of the rail link will be in contact with the side of the final drives wheel and the guide wheel, thereby increasing the degree of wear.

Therefore, walking and sudden steering in inclined areas should be avoided as much as possible. Straight line travel and large turns can effectively prevent wear. Care should be taken to check the bolts and nuts. When the machine is working for a long time, the bolts and nuts will loosen due to vibration of the machine.

In particular, the bolts and nuts on the lower walking body are easily affected. If the machine continues to run with the track shoe bolts loose, a gap will be created between the bolts and the track shoes, which will cause cracks in the track shoes.

Moreover, the generation of clearances may also increase the bolt holes between the track and the rail links, resulting in inability to tighten and the serious consequences of having to change the track and rail links.

Therefore, bolts and nuts should be inspected regularly and tightened to reduce unnecessary costs. The following parts should be inspected and tightened:

◆ track shoe bolts;

◆Support roller and carrier roller mounting bolts;

◆ drive wheel mounting bolts;

◆ Walking piping bolts, etc.

It is also necessary to check the parts that are not to be maintained. In order to facilitate the maintenance of the machine, various necessary techniques have been adopted. For example, a floating oil seal is used on the roller, carrier roller and drive wheel to meet the working requirements of these components.

Usually, such parts do not need to be refueled, but since they are only injected with a small amount of oil at the factory, in the event of leakage of these oils, wear of the shaft and the bearing parts may occur, and in the case of severe shaft breakage may occur. Therefore, in daily inspections, these parts should also be inspected to confirm the presence of oil leakage.

Regular cleaning of the lower walking body is critical. Attention should be paid to the inspection of the lower walking body that supports the weight of the entire excavator and plays a huge role!

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