TM 9-2320-209-34-2-3 e. Replacement. FRAME 1 1. Hold upper gusset (1) in place on bumper bar (2). 2. Put in three screws with self-locking nuts (3). 3. Hold lower gusset (4) in place on bumper bar (2). 4. Put in three screws with self-locking nuts (5). 5. Do steps 1 through 4 again on other side of bumper bar (2). GO TO FRAME 2 19-10