гусеничный каток бульдозер экскаватор дно

The Swing Drive Reducer Gearbox powers the Excavator’s upper structure. This structure includes the slewing gear bearing, atop the chassis.
They are durable. They are crafted for easy repair and long use. The swing drive has many gear parts. These include the sun gear, planetary gear, needle, and roller bearings. They also include the carrier, pinion shaft, pinion gear, oil seal, ring gear, and swing housing case.