TM 1-1520-238-23
6-176
Change 4
6.36.
ENGINE NOSE GEARBOX AND QUILL SHAFT REMOVAL/INSTALLATION continued
6.36.6. Installation
CAUTION
To prevent foreign object damage to en-
gine, cooling fan diffuser, or impeller, en-
sure all bolts, screws, or plugs are
removed from all jackscrew holes.
NOTE
Perform steps a. and b. if replacement
gearbox is being installed. Go to step
c. if gearbox is not being replaced.
If replacement gearbox is being
installed, ensure shipping plug is re-
moved from bottom section of gearbox
housing.
a. Install engine nose gearbox flexible coupling,
diffuser, and fan impeller (para 6.33).
b. Install three fairing standoffs (26), (27), and
(28) on gearbox (19).
(1) Position two shims (31) and standoffs (26) on
gearbox (19).
(2) Install four screws (29) through washers (30),
two standoffs (26), shims (31), and gearbox
(19).
(3) Position shim (34) and standoff (27) on gear-
box (19).
(4) Install two screws (32) through washers (33),
standoff (27), shim (34), and gearbox (19).
(5) Position shim (37) and standoff (28) on gear-
box (19).
(6) Install screw (35) through washer (36), stand-
off (28), shim (37), and gearbox (19).
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28
33
26
30
31
31
36
35
37
32
27
34
M04-547-7
29
26
30
29
19