Remove the 4 bolts on the sides and drop the unit. I used my tractor bucket with some lumber to shim it securely to prevent side to side wobble. Easy to lower and set on ground to remove the cotter, castle nut, and pull apart. I could not budge the swivel from new. After applying red grease to the spindle and bearing (very little lube from the factory) the assembly glides by hand. I also lubed the plastic square pad with lithium spray. I am very pleased with the concept, design and performance. I have read on the forum you should not be able to swivel the pin arm by hand. A properly lubed bearing, spindle, friction pad and a tight castle nut with cotter pin in correct hole in spindle, you can move it by hand. If you over torque the castle nut, you will cause the bearing to fail. It will take two people to drop and install without a lift or tractor. I would not attempt support the lower, remove castle nut, bearing and drop, reinstallation will be difficult and cumbersome.