At the same time, it is Non-standard Series Deep Groove Ball Bearings to correctly grasp the rotation angle to reduce the time for turning; the truck position is lower than the excavator to shorten the boom lifting time, and the sight line is good; first install the sand , Gravel, and then place big rocks, so as to reduce the impact on the car box. 5. The operation technique must first confirm the surrounding conditions. When crushing, because the vibration will gradually change the direction of the hammer head, the bucket cylinder should be adjusted at any time to make the direction of the hammer head perpendicular to the surface of the broken object. Excavating rocks. Effective digging method When the bucket cylinder and the connecting rod, the stick cylinder and the stick are 90 degrees each other, the digging force is the largest; when the bucket teeth and the ground maintain an angle of 30 degrees, the digging force is the best, namely cutting the soil The resistance is minimal; when digging with the stick, the angle of the stick should be ensured to be between 45 degrees in the front and 30 degrees in the back. This operation should be avoided as much as possible. When working in soft areas or in water, you should understand the degree of soil looseness and pay attention to limiting the excavation range of the bucket to prevent accidents such as landslides and collapses and deep vehicle body subsidence. 4. When the crawler is deep in the mud, place a wooden board under the bucket, use the bottom of the bucket to support the crawler, and then place a wooden board under the crawler to drive the machine out. The machine should be placed on the ground to prevent the machine body from shaking. When crushing, the crushing head should always be pressed on the crushed material, and the crushing operation should be stopped immediately after the unbroken material has been crushed. When passing the mound, always use the working device to support the chassis to prevent the car body from shaking or even tipping over. 2.