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TM 10-4320-311-14
REMOVAL: Refer to Figure 4-15.
a.
Loosen spark arrestor clamp and remove spark arrestor (1).
b.
Remove discharge coupling elbow (2).
c.
Remove lifting handle assembly and strap plate (3) nearest discharge coupling elbow (2) by removing cap
screws, washers, and nuts (4).
d.
Remove three cap screws, washers, and nuts securing the sound enclosure rear panel assembly (5) to the frame
(6).
e.
Remove wing nut (7) and washer from tie rod.
f.
Remove sound enclosure rear panel assembly (5) from frame (6).
INSPECTION
a.
Inspect the riveted information plates on the sound enclosure rear panel assembly. Damaged information plates
must be removed and replaced. If any rivets are missing from undamaged information plates, the missing rivets
must be replaced.
b.
Inspect the acoustical foam (8) within the sound enclosure rear panel assembly (5). If acoustical foam blocks air
flow, or is torn, scarred, or shows signs of contacting the hot engine surface, it must be replaced.
REPAIR:
WARNING
Wear safety goggles during blind rivet removal to protect your eyes from flying metal chips
a.
Drill out all rivets (9) until damaged information plate can be removed.
b.
Replace damaged information plate.
c.
Use hand blind riveter and M24243/1B403 rivets to attach new information plate.
WARNING
Toluol solvent is potentially dangerous. Avoid repeated and prolonged breathing of vapors and
skin contact. Do not use near open flame, arcing equipment, or other Ignition sources. Always
wear safety goggles for eye protection from splashing. Gloves should be worn during use of
solvent.
d.
To remove damaged acoustical foam (8), pull the acoustical foam firmly away from sound enclosure rear panel
assembly. Approximately 1/8 inch of acoustical foam and adhesive backing will remain.
e.
Apply Toluol solvent to acoustical foam and backing to thoroughly wet surface area.
f.
Let set for 2 to 3 minutes
g.
Using putty knife, peel adhesive backing from surface of sound enclosure rear panel assembly. Apply additional
Toluol as needed.
h.
To replace acoustical foam (8), wipe surface area of sound enclosure rear panel assembly with a clean cloth
dampened in Toluol solvent, and immediately wipe solvent from surface with a clean, dry cloth.
4-33
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