1. Turn the unit upside down.
2. Pry off the large rubber drive track by pushing track off with one hand while turning rubber brush with other hand, as shown in figure 1.
3. Pry off wheel tube by gently pushing side plate out with one hand and remove wheel tube with other hand, as shown in figure 2. If installed, you will also need to remove the stainless-steel retaining rings located on the outer ends of the wheel tube.
4. Remove wheel tube and bushing(s) as shown in figure 3.
5. Reverse steps 4 through 1 to complete the installation of the new bushing(s). You must install the new bushing from the inside of the side plate as shown in figure 4, unless your unit comes with retaining rings. In this case, the bushings are installed from the outside of the side plate.
6. Congratulations! You have successfully installed your new bushings!

FIGURE -3