TM 10-4320-307-24
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FAN HUB AND BRACKET REPLACE (CONT) .
13.
Remove two capscrews (21), lockwashers (22),
and washers (23).
14.
Unscrew two captive capscrews (24).
15.
Remove fan brace (25).
16.
Screw two captive capscrews (26) and remove fan
support (27).
INSPECTION:
1.
Inspect fan hub assembly for the following:
a. Freedom of rotation.
b. Cracks.
c. Grease seal leakage.
2.
Replace fan hub assembly if fan pulley (1) does not
rotate freely or if there is evidence of cracks or
grease seal breakage.
3.
Measure fan pulley (1) end clearance . End
clearance must be 0.003 inch to 0.010 inch (0.08
mm to 0.25 mm).
4.
Replace fan hub assembly if end clearance is not
within above specifications.
5.
Attach fan pilot spacer (2), fan spacer gasket (3),
and protective shipping cover (4) using capscrew
and lockwasher (5), and forward defective fan hub
assembly to direct support maintenance.
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