Xugong 75 is the tenth butter nozzle. The screw model of the crawler grease nipple of modern excavators is generally 10, and the 10 grease nipple of Xugong 75 small excavator is located on two bucket pins and two connecting rod pins in the middle of the lower turntable of the boom cylinder in front of the excavator. Butter nozzle is the simplest way of mechanical lubrication.