Analysis of the excavator track grease release method and drag chain prevention skills

Feb 10th,2025 156 Views

The excavator's big arm, small arm, bucket, rotating big gear ring, track correction frame, etc. need to be filled with butter.

Squeeze the grease gun head into the grease nozzle. At this time, the grease gun head and the grease gun nozzle are in a straight line. Swing the grease gun pressure arm to fill until the grease just overflows the pin.

Remember, it is the handle that is swung, and the gun barrel does not move, otherwise the grease gun head and the grease nozzle are easy to break. If you can't pull it out after the spraying, pull the grease gun left and right and swing it a few times to pull it out. The swing amplitude should not be too large, which will easily break the grease nozzle.

Today, let's talk about how to make the excavator track grease.

On the inside of the excavator track, you can find a drain valve. The outermost end of the drain valve is a grease nipple. Remember that draining the track is very dangerous. The tensioning cylinder is under the pressure of the whole vehicle, and the grease injection pressure is very high. It is easy to cause danger if you are not careful when draining. Find a sleeve and gently twist the grease nipple. When you find that the grease appears on the grease nipple, stop the action and let the grease flow out by itself under the pressure. Leave it for a while, and then gently twist the grease nipple again. Repeat this process. It is best to find a professional or someone who has done this job before to do it. This job is very dangerous for inexperienced people. If it is not handled properly, the grease nipple sprayed out can penetrate the entire head of a person.

Excavator

How to avoid excavator chain derailment? You may not know these points.

1. Chain derailment caused by tensioning cylinder failure.

At this time, you should check whether the tensioning cylinder has forgotten to apply grease and see if there is oil leakage in the tensioning cylinder.

2. Chain derailment caused by severe track wear.

If used for a long time, the crawler will definitely be worn, and the wear of the chain ribs, chain barrels and other parts on the crawler will also cause the crawler to derail.

3. Derailment caused by wear of the chain guard.

Now almost all excavator crawlers have chain guards, and chain guards can play a very important role in preventing derailment, so it is also very important to check whether the chain guard is worn.

4. Derailment caused by wear of the drive motor ring gear.

For the drive motor ring gear, if the wear is serious, we need to replace it, which is also an important reason for the excavator to derail.

5. Derailment caused by damage to the sprocket wheel.

In general, oil leakage from the sprocket wheel oil seal will cause serious wear of the sprocket wheel, which will cause the crawler to derail.

6. Derailment caused by damage to the guide wheel.

When checking the guide wheel, check whether the screws on the guide wheel are missing or broken. Check whether the groove of the guide wheel is deformed.

How to prevent the crawler chain of the excavator from derailing?

1. When walking on the construction site, please try to place the travel motor behind the walking to reduce the squeezing of the sprocket.

2. The continuous walking time of the machine cannot exceed 2 hours. The walking time on the construction site should be minimized. If necessary, it is recommended to walk after a short stop in the middle.

3. Avoid protruding hard objects when walking to avoid stress concentration on the track chain.

4. Confirm the tightness of the crawler, adjust the crawler tighter in soft places such as soil, and adjust the crawler looser when walking on stones. It is not good to have a crawler that is too loose or too tight. Too loose will cause the crawler to derail easily, and too tight will cause the chain sleeve to wear too quickly.

5. Check whether there are foreign objects such as stones in the crawler frequently, and clean them if there are.

6. When working on a muddy construction site, it is necessary to frequently idle to discharge the soil deposited in the crawler.

7. Try to avoid the excavator turning in circles on the spot.

8. Regularly check the rail guard and the rail guard welded under the guide wheel.

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