TM 9-4520-251-14
4-55 DAMPER CONTROL AND SHUTTER ASSEMBLY
This task covers:
a. Inspection
c. Removal
b. Adjustment
d. Installation
INITIAL SETUP
Tools
Equipment Condition Para
Condition Description
Tool kit, service, refrigeration unit
4–44
Duct adapter removed.
(Appendix B, Section Ill, Item 1)
Materials/Parts
Radiation shield
Shutter assembly
Stop damper
Damper
Location/Item
Action
Remarks
INSPECTION
1. Handle
2.
Shutter assembly
3. Radiation
shield
ADJUSTMENT
4. Shutter assembly
Inspect handle (1) for looseness.
Tighten setscrew (2) if needed.
Operate handle the full length of
slot (3) and observe shutter as–
sembly (4) for full opening and
closing procedure.
Check lock nut (5) for looseness.
Do not overtighten, Handle (1)
should move smoothly but have
enough tension to prevent air
setting from vibrating out of
adjustment.
Check screws (6), washers (7),
and nuts (8) for looseness. Radi–
ation shield (9) must be firmly
secured.
Shutter assembly (4) will not require adjustment if
properly installed. If handle (1) will not move through–
out full range, first determine that all fasteners are
tight. Replace missing parts. If malfunction continues,
disassemble and locate faulty part.
4-135
