TM10-3930-660-20 13-4. TIRES -  REPLACE (Cont’d) 2. REMOVE TIRE (3) FROM WHEEL ASSEMBLY (6) . a. Place wheel assembly (6) and tire (3) flat on floor with aligning ring (7) facing up. When dislodging tire beads, lock rings (8), or aligning rings (7) be absolutely certain no air pressure remains in tire (3) . Serious injury or loss of life could  result. Use care when remounting tires (3) to avoid damaging tire beads or bead seats. b. Loosen outer tire bead from aligning ring (7) by inserting curved bead breaker tire iron (a) between tire bead and aligning ring (7). Rim (b) is part of wheel assembly (6). c. Work progressively around rim (b) rotating tire iron (a) down, until tire bead is completely free of aligning ring (7). 13-5