TM 9-2320-361-10 2-25. OPERATION OF CARGO TRUCKS (Contd) e. Installing Front and Side Racks. (1) To install front (2) and side (1) racks, reverse steps d.1. through d.6. (2) When installing front rack (2) on cargo truck without dropsides, be sure front rack retainer clip (3) is inserted inside rack retainer ring (4). f. Lowering and Raising Dropsides. (1) Park vehicle where it can best be loaded or unloaded. Turn accessory power switch and all other switches to OFF position, engage engine stop control, and apply parking brake. (2) Turn locking handle (10) counterclockwise to loosen. Grasp ring (9) and turn T-bolt 90 degrees. Withdraw locking handle (10). Repeat process on opposite end of tailgate (11). (3) Grasp top of tailgate (11) and pull it back. Do not allow tailgate (11) to drop. 2-102