TM 1-1520-238-23
6-158
Change 5
6.33.
ENGINE NOSE GEARBOX FLEXIBLE COUPLING, VANEAXIAL FAN, AND INLET DIFFUSER
REMOVAL/INSTALLATION – continued
CAUTION
Adapter must have a slip fit with en-
gine nose gearbox shaft. If adapter
cannot be installed on gearbox shaft
until it contacts end of rotor seal using
light hand force only, replace adapter
with another adapter having an ac-
ceptable slip fit on gearbox shaft. The
application of additional installation
force to adapter can reduce life of
gearbox shaft ball bearing.
To prevent damage to inlet diffuser
and fan, ensure that fins of fan do not
rub against inner surface of diffuser
when fan is installed and hand rotated
in diffuser.
d. Install fan (6) with coupling (7) on gearbox
shaft (2).
(1) Install fan (6) with coupling (7) on shaft (2).
(2) Check for rubbing between fan (6) and diffus-
er (17).
(a) Insert piece of paper (24) between fins
(25) of fan (6) and inner surface (26) of
diffuser (17).
(b) Rotate fan (6) by hand.
(c) Check for rubbing between fins (25) of
fan (6) and inner surface (26) of diffuser
(17).
(3) Remove fan (6) with coupling (7) from shaft
(2).
(4) If rubbing between fins (25) of fan (6) and
inner surface (26) of diffuser (17) exists, go to
step e.; otherwise go to step e.(5).
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M04-0545-12
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25
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