TM 10-3930-669-20 16-8.    CAB HEATER REPLACEMENT/REPAIR (CONT). b. Disassembly. (1) Disconnect  wire  (15)  from  heater  assembly (12). (2) Disconnect connector (16). (3) Remove  eight  screws  (17),  two  fan  covers (18),   and   outer   air   rams   (19)   from   fan housing (20). (4) Remove  four  screws  (21),  clamp  (22),  and rubber  liner  (23)  from  fan  housing  (20)  and fan motor assembly (24). (5) Remove rubber liner (23) from clamp (22). (6) Remove    fan    motor    assembly    (24)    and rubber liner (23) from fan housing (20). (7) Remove  two  retaining  clips  (25),  fans  (26), and   inner   air   rams   (19)   from   fan   motor assembly (24). (8) Remove  two  assembled  nuts  (27),  screws (28),  and  diode  plate  assembly  (29)  from fan  housing  (20).    Discard  two  assembled nuts. (9) Remove  eight  screws  (30)  and  fan  housing (20) from heater core housing (31). 16-22