TM 10-3930-659-20 16-5. DEFROSTER BLOWER DUCTS AND DUCT HOSE REPLACEMENT (Con't). 5. Position seal (5) on cab floor (2) and thread duct hose (1) through seal and cab floor. 6. Slide  clamp  (4)  on  duct  hose  (1)  and  position duct hose on cab duct (3).  Tighten clamp. 7. Slide two clamps (10) and clamp (9) on duct hog (1), and position duct hose on defroster blow (8). 8. Tighten  clamp  (9)  and  install  two  clamps  (10) on cab floor (2) with two washers (6) and screws (7) FOLLOW-ON TASKS: • Install lower dash cover (see paragraph 14-23). • Install cab skirts (see paragraph 14-6). TA706980 16-18