For this operation please check your operators manual. Remove the gear guard or flip the top cover up. Thread the driven gear off the top of the power screw. Slide the center of the load cell over the hole in the top cell bar that passes the power screw. Align the threaded holes in the load cell with the mounting holes in the top cell bar. Insert two thumbscrews through the holes and thread into the load cell. Raise power screw through load cell. Spin driven gear onto power screw. Lower power screw until drive and driven gears engage. The pins in the driven gear must fit into the holes in the top of the load cell. Tighten mounting thumbscrews. Reattach gear guard or top cover.