Samsung RF267AERS/XAA. Remove the lower rear metal cover and tilt the fridge/freezer forward. Just enough to have someone slide in a piece of lumber, 1” x 1” from the side under the fridge. 1-2” in front of the casters. The lumber shall be long enough to cover the whole width of the fridge. Remove the old caster with something sharp and a hammer to split it. Remove the shaft by using a flat screwdriver and hammer it into the opening of the shaft. Continue with a Philips screwdriver or similar and the hammer to make the opening wide and somewhat round enough to pull/drive it out. Use a pair of pliers to squeeze the end of the shaft flat when mounting the new parts.