Things You'll Need
Instructions
Remove the three handles from the side of the crane. These are the handles you turn to lift and lower the crane.
Plug one motor onto the exposed arm on the upper beam to replace the removed handle.
Attach a Technic wire to the bottom of the motor.
Attach the motor to the beam using the Technic pieces. Use pins and bricks to clip the motor to the side of the crane.
Repeat with the remaining two motors on the exposed rods. These are the rods which were used for the handles initially.
Attach the wire from the first motor to one battery pack. Attach a single 1-by-4-stud plate to top of the battery pack. Connect the other two battery packs to the other two wires, and label them with two and three 1-by-4 plates respectively.
Press the buttons on the battery packs to move the crane.