TM 9-4120-407-14
c. Installation.
NOTE
Installation is typical of both fans and motors.
(1) Install inlet bell (4) Figure 3-53, on collar assembly (1) located as noted during removal, four
screws (2), and flat washers (3).
(2) Install key (8) Figure 3-52, fan (7), and tighten two set screws (6).
(3) Install four shims (4), motor plate (5), four screws (1), new lock washers (2), and flat washers (3).
NOTE
The fans are not identical. They must rotate in opposite directions.
Take care that they are installed on correct side.
(4) Observe fan (3) Figure 3-51 rotation noted during removal and install motor fan assembly (7), four
screws (4), new lock washers (5) and flat washers (6).
(5) Check that fan (3) is centered on inlet bell (4) Figure 3-53. If it is not, loosen mounting hardware
and adjust as necessary. Retighten mounting hardware. If front to rear adjustment is required,
loosen mounting hardware and add or remove shims (4) Figure 3-52 as necessary.
(6) Loosen two setscrews (6), and slip fan (7) down so that there is 0.06 to 0.08 in. (0.15 to 0.20 cm)
clearance between fan and inlet bell (4) Figure 3-53. Tighten setscrews.
(8) Secure wires with new tiedown straps (2) as necessary.
NOTE
FOLLOW-ON MAINTENANCE:
3-123