The butter nipple of Caterpillar 320 track is one of the components used to lubricate the sprocket and wheel of the track. To remove the butter nipple, follow these steps:

1. First, park the Carter 320 on a flat ground, turn off the engine and pull up the crawler.

2. Use a wrench or tool to open the retaining nut of the butter nozzle.

3. After the fixing nut is completely loosened, gently unscrew the butter nipple by hand.

4. If the butter nozzle is tight, you can use some lubricant or hydraulic tools to help unscrew it.

It should be noted that the grease nipple is an important component used to lubricate the caterpillar sprocket and caterpillar wheel. Before removing the grease nipple, please make sure that the replacement grease nipple is ready and replaced according to the correct steps. If you are not familiar with the operation or have any questions, it is recommended to consult professional mechanical maintenance personnel or the instruction manual of Carter 320.