The reason why the steel giant excavator can be used in various dangerous construction environments, the crawler can be said to play a vital role. The rock-solid crawler not only allows the excavator to walk worry-free, but also protects the driver’s safety. convoy. Recently, many machine friends have turned to the brick house for help. How to adjust the crawlers properly according to different working conditions and different road surfaces? How to measure the track tightness the fastest and most accurate? This is a headache for many machine friends. The following experts explain how to adjust the crawler based on Komatsu 200-7.
Track tightness measurement
Track tightness measurement is relatively easy, as long as you master the measurement methods and skills, it can be completed quickly and accurately.
First find a smooth road surface, run the excavator at low idle speed, and make the excavator move forward the length of the track shoe on the ground (the guide wheel is forward in front of the excavator), then slowly stop the excavator, do not Stop suddenly, stop slowly. ---Jiangxi Sprocket
Find an iron rod or a relatively straight wooden rod (or pick a suitable straight object from the local material) and place it on the track shoe between the guide wheel and the first carrier sprocket, because the bending is not easy to measure the accuracy.
Measure the maximum gap between the iron rod or other reference object and the track (the normal maximum standard gap is 10-30mm).
Here, the brick house warmly reminds everyone that the excavator crawler has abnormal noise, wear, or directly falls off the chain, then the crawler must be adjusted at this time, and it must not be changed!
Increase the tension or reduce the tension by adding grease or releasing grease (butter). If the tension is still low after the grease is added, it means that the track pin and bushing are seriously worn. In this case, only a new one can be replaced. Prevent the track from falling off.
Crawler tightness in various working conditions
This problem is believed to be the most concerned by many machine friends, because excavators of different tonnages must use different standards of tension in front of different working conditions, so as to maximize the role and life of the crawler!
On hard and flat roads, such as cement hard roads or municipal flat shoulders, the crawlers should be properly adjusted, because once the crawlers are too long or loose, they will increase the wear of the rollers.
On uneven roads, such as gravel roads, potholes, etc., the crawlers should be loosened to reduce the intensity of wear.
If the excavator works in a soft environment for a long time, such as sand and dirt roads, silt roads, the crawler track should be adjusted loose, because the crawler track is often easy to absorb dirt, after the crawler track is loosened, it can increase the walking force area to prevent the sliding caused by walking The travel motor is overloaded.
This is the most important thing, that is, the excavator must have the same tension on the left and right side of the crawler to prevent the walking deviation from causing serious impact on the excavator!
The excavator's feet-whether there is a problem with the crawler, directly determines the working speed and efficiency of the excavator, so even the old driver should make crawler adjustment as a required course for work!
Fortunately, the adjustment of the track is not as complicated as other failures of the excavator, and there is no way to start! As long as you are proficient in measuring techniques and measuring normal values, everything can be solved!