TM  1-3930-669-20 (8)   Install   cover   (35)   on   heater   core   housing   (31) with ten screws (34). (9)   Install  two  brackets  (33)  on  heater  core  housing (31) with four screws (32). (10)  Install  fan  housing  (20)  on  heater  core  housing (31) with eight screws (30). (11)  Install diode plate assembly (29) on fan housing (20) with two screws (28) and nuts (27). (12)  Install  two  inner  air  rams  (19)  and  fans  (26)  on fan motor assembly (24) with two retaining clips (25). (13) Position rubber liner (23) on fan housing (20). 16-25