I built this for moving snow because I did not need to move alot of dirt and my plow truck would not fit where I needed to clean. did not want a jonny bucket due to the snow drifts get up to 5 feet deep, and I wanted to be able to dump into a normal sized truck. It will lift about 450lbs about 6.5 feet high. It is biult out of used steel I had lying around and got used cylinders from a recycle yard. I used both uprights as my tank and yes the arms are 3inch I beam. The bucket is 54inch wide 20inchs deep and 16inchs high. (snow doesn't weigh as much as dirt) I didn't know if the stamped front axel would hold up but it is doing fine.(been abusing it for 2 years) when I build another I will do some things different. (any questions just ask) I didn't have any plans just built it to fit the tractor and built the mount so I could put it on a different tractor if needed. The hyd pump is off a older john deere(no idea what size and the valve asm came off a forklift (4k) Its not pretty but it is very effective. Thanks for listening to my rambaling.