... material handling, warehouse, load and unload goods to container... Mobile hydraulic unload container ramp:Model rated load ( ... system:1. With handle pump, screw the return valve clockwise.2. Move the handle stick, to ... lift the ramp slowly.3. When the return valve is screwed counterclockwise, the hydraulic oil will go ... under the plate.3. Release the return valve, and the ramp will fall down onto the ...