The Komatsu PC 195 LC excavator is a heavy-duty machine designed to move soil and other materials on construction sites. Here's how it works:

1. Digging: The PC 195 LC excavator uses a powerful hydraulic arm with a bucket attachment to dig into the soil. The operator controls the arm and bucket using joysticks in the cab of the machine.

2. Loading: Once the bucket is full, the excavator can move the soil to a new location. The operator uses the hydraulic arm to lift the bucket and swing it over to the desired location.

3. Dumping: To unload the soil, the operator tilts the bucket and releases the soil onto the ground. The excavator can also be used to deposit soil into trucks for removal from the site.

4. Grading: The PC 195 LC excavator can also be used for grading the site. The operator can use the bucket to level out the soil, creating a smooth surface for construction.

5. Trenching: In addition to moving soil, the excavator can also be used for trenching. The hydraulic arm can be equipped with a digging attachment to create trenches for utilities or drainage.

Overall, the Komatsu PC 195 LC excavator is a versatile machine that can be used for a variety of tasks on construction sites, particularly those involving moving and grading soil. Its powerful hydraulic system and bucket attachment allow it to handle even the toughest digging and hauling jobs with ease.