I had actually taken it apart and tested it before thinking about selling it or using it. It has a flat tang style shaft. I was thinking about a power unit but not for a dump trailer, I have a 12k sure-trac. I was also given 2 powered wheel chair/scooters that use 24v to power the two drive motors, I was thinking of building a small tank like vehicle with this motor and pump mounted on it. It could be a mobile power unit for things like shop press or anything else that could use hydraulics... but then I asked myself why? its not like I have extra time just laying around. And i'm not sure how useful it would actually be.