TM 9-4120-404-14
CHAPTER 5
GENERAL SUPPORT MAINTENANCE INSTRUCTIONS
Section I. GENERAL SUPPORT MAINTENANCE PROCEDURES
5-1. GENERAL. The procedures in this section cover all items which appear in the general support maintenance level on
the Maintenance Allocation Chart (MAC) which is provided in Appendix B.
5-2. HOUSING REPAIR.
This Task Covers:
a. Blind Nuts and Nut Plates
b. Insulation, Casing
c. Housing Replacem ent
Initial Setup:
Tools Required
Tool Kit, Service, Refrigeration, Unit (Item 1, Appendix B)
Drill, Electric, Portable (Item 2, Appendix B)
Drill Set, Twist (Item 2, Appendix B)
Material/Parts Required
Methyl-ethyl Ketone (Item 10, Appendix E)
Adhesive (Item 15, Appendix E)
Rivets (Refer to TM 9-4120-404-24P)
Equipment Condition
Air conditioner shut down and cool.
a. Blind Nuts and Nut Plates.
(1) To replace blind nuts (rivnuts) use a drill slightly smaller than the body of the bli nd nut,
(a) Carefully drill the old blind nut out,
(b) Install replacement part.
(2) To replace nut plates, use a drill slightly smaller than the body of the rivets securing the nut plate.
(a) Carefully drill the rivets loose.
(b) Remove the old nut plate.
(c) Install new nut plate with properly sized rivets.
5-1
