Park the Dixon zero turn lawn mower on a flat surface, and then remove the spark plug to prevent the lawn mower from starting. Raise the front of the lawn mower using a hydraulic jack to gain access to the blade(s).
You should wear thick work gloves when holding the blades to avoid being cut from the sharp edges. Hold or use a wood block to prevent the blade from turning. Then loosen the blade nut and remove the blade. Install new blade and tighten the blade nut securely.
The model and serial numbers on your Dixon zero-turn mower can be found on the frame of the mower.
NOTE: if you need a part for the small engine in your Dixon zero-turn mower, there will be a separate model/serial number for the engine. Here are the small engines that are available in your Dixon mower. Visit the page of the engine you have to find out where the model/serial number is located for your small engine model: