Here is a video of the Bed Lifting up. It lifted nice when it had hydraulic oil. Never mind the leak under the engine, it was just a heater hose.
Lifting up the bed. If you pay attention you will see parts of the GMC 473-D diesel and the GMC 650 Single ax tractor behind the white trailer.
Here is a video of how we got the lift bed to go down. Things need a bit of grease and use.
Pushing down the bed. 
