TM 5-4520-256-14
3-12.
DUCT ASSEMBLY MAINTENANCE-Continued.
b.
Inspection.
(1)
Inspect clamps for damaged screw head, deformed slots on strap, corrosion, or broken strap.
(2)
Inspect duct for rips, tears, and deterioration.
(3)
Inspect duct stiffener for bends and breaks that allow the duct to collapse or have torn or punctured the
duct.
c.
Cleaning.
(1)
Clean the duct using a mild solution of soap (item 10, Appendix E) and water.
(2)
Rinse thoroughly with clean water.
(3)
Allow to dry completely.
d.
Repair.
(1)
Small tears and holes may be repaired by patching with pressure sensitive tape (item 13, Appendix E).
(2)
Replace clamp by unscrewing screw until strap is loose. Remove clamp strap. Insert new strap into duct.
Connect clamp connector and tighten screw a few turns to secure strap end.
e.
Installation.
(1)
Place duct (1) into position on discharge air outlet (5) and shelter connector.
(2)
Tighten clamps (3) on both ends of duct (1) securely.
(3)
Place duct (2) into position on return air duct (4) and shelter connector.
(4)
Tighten clamps (3) on both ends of duct (2) securely.
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