Polaris Vac-Sweep 280 / 180 / 280 TankTrax Pressure Cleaner Wheel Washer, Plastic (C64)
The wheel washer is a replacement part made by Polaris. The same high-quality materials were used to manufacture the original factory part. Making this a genuine OEM product.

The purpose of this part is to be placed before the ball bearings that are used for the wheels. This helps with being a protective cover for the bearings keeping any outside influence from compromising them. It also helps to keep you from over-tightening the wheel lock screws. 

This part is white and can be found in the center of the wheel assemblies. There is a total of 4 needed to ensure the cleaner can perform to its maximum capabilities. However, these parts are plastic which means they can and will deteriorate over the length of use of the cleaner, but they are easy and simple to install.