Hydraulic 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 back, and the ramp will fall down on its own weight.
 
Operation process
1. Fasten the return vavle and press the handl to move the ramp over the truck soleplate. Unfold the landing legs to working height.

2. Drive the car under the plate.

3. Release the return valve, and the ramp will fall down onto the afterbody of the truck, then fasten the ramp and the truck with the chain.  The hyraulic system and the tyres of ramp do not carry the weight.

4. Operating starts.

5. When the operation finishes, untie the fixing chains. Lifting the ramp by the handle stick, and then drive out the truck.

6. Uplifting the afterbody of the ramp to move around hang on the truck.