TM 10-3930-659-20 16-2. DEFROSTER BLOWER MOTOR MAINTENANCE (Con't). c. DISASSEMBLY 1. Remove  three  nuts  (17)  and  defroster  blower motor (16) from housing (12). 2. Remove  setscrew  (13)  and  impeller  (18)  from defroster blower motor (16). 3. Remove   two   nuts   (14)   and   plate   (15)   from defroster blower motor (16). d. ASSEMBLY 1. Install plate (15) on defroster blower motor (16) with two nuts (14). 2. Install  impeller  (18)  on  defroster  blower  motor (16) with setscrew (13). 3. Install defroster blower motor (16) on housing (12) with three nuts (17). TA706968 16-5