If you’re using a standard dolly, you’ll need a jack. First, lift the vehicle you want to mount on the dolly. Second, slide the skate under the wheel and put it in the right position. Lastly, lower the vehicle onto the skate using the jack. Do this for every tire.
Using a hydraulic dolly is much easier. Separate the two metal bars so that they can fit around the lower portion of your car’s tire. Then, step on the hydraulic lever several times until the car is raised by about two inches. Lastly, make sure the vehicle is securely attached to the dolly.