Using these axle washers is straightforward. First, make sure you have the right model and year of your Polaris UTV as specified in the fitment list. When installing, follow the instructions carefully by clicking on the installation link provided. It's important to note that these washers are sold in packs of 4, so ensure you have enough for your needs. Regarding maintenance, the zinc coating helps resist corrosion, but it's still a good idea to clean the washers regularly, especially after driving in muddy or wet conditions. If you notice any excessive vibration or the wheel/tire rocks freely when the suspension is unloaded, it might be a sign that the preload is off or there is a problem with the bearings. In such cases, it's best to check and adjust the preload or inspect the bearings for damage.