I don't have the dimensions but a little thought on the process. I had one on a JD 4020.
1. The bucket is part of the equation.
2. The hoses stay attached until you get the loader detached from the tractor so that you can operate the bucket.
3. As I recall, mine were just tubular steel, about 2 3/8 Sch 30 or less (might be called tubing) with a pin at the top and flat plate on the bottom.
4. To unload, bucket is placed with the front lip on the ground with a slight angle to the bucket causing the rear to be 3-4" off the ground. As the bucked comes down to this position the legs touch the ground. 5. The hyds are juggled a tad while the pins are pulled on the loader at the tractor and then the bucket is let down to the flat position causing the tractor end of the loader to raise up off the tractor. The bucket stabilizes the loader while off the tractor.
6. Disconnect the hydraulics and back away from it.
Best I can remember.