Samsung does not make it easy to replace the casters. The shafts holding the casters are crimped at the ends and had to be cut off with little room for any tools. I had to jack up the fridge and I used a hacksaw blade with a handle to cut through the wheel shafts. I didn't want to use a reciprocating saw. I couldn't find a way to crimp the new shafts so I drilled small holes at the ends and used cotter pins to retain the shafts in place.The rear caster had no room to slide the new one in without removing the rubber mount under the compressor. Frustrating to the point of almost calling a tech to do the work but satisfying to come up with a way to do it myself.