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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 raised 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.

1. Chain off caused by tension cylinder failure
At this time, you should check whether you have forgotten to butter the tension cylinder and see if there is any oil leakage in the tension cylinder.

2. Chain off caused by severe wear of the crawler
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 chain off.

3. Chain off 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 chain off, so it is also very important to check whether the chain guard is worn.

4. Chain off caused by wear of the drive motor ring gear
For the drive motor ring gear, if it is severely worn, we need to replace it, which is also an important reason for the excavator chain off.

5. Chain off caused by damage to the sprocket wheel
Generally speaking, oil leakage of the sprocket wheel oil seal of the excavator will cause severe wear of the sprocket wheel, which will cause the crawler chain off. The public account Zhizao Daguan focuses on sharing relevant theoretical knowledge in the engineering machinery manufacturing industry.

6. Chain derailment caused by guide wheel damage
When checking the track guide wheel, check whether the screws on the guide wheel are missing or broken. Check whether the groove of the guide wheel is deformed.

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A control valve failure can cause improper hydraulic function, insensitive operation, hydraulic oil leakage and unstable system pressure.