Chapter 5. GENERAL SUPPORT MAINTENANCE INSTRUCTIONS

TM 5-4120-359-14

CHAPTER 5

GENERAL SUPPORT MAINTENANCE INSTRUCTIONS

Section I REPAIR PARTS, SPECIAL TOOLS, TMDE, AND SUPPORT EQUIPMENT

5-1. GENERAL

Repair parts are listed and illustrated in TM 5-4120-359-24P. No special tools are required for general support

maintenance of the air conditioner. Test, maintenance, and diagnostic equipment (TMDE), and support equipment,

includes standard electrical test equipment and standard pressure and vacuum gages, vacuum pumps, and servicing

manifolds found in any general support maintenance refrigeration facility.

Section II AUTHORIZED GENERAL SUPPORT MAINTENANCE ACTIONS

5-2. GENERAL

The only items restricted to general support maintenance level by the Maintenance Allocation Chart (MAC are the repair

or replacement of insulation or lifting fittings on the evaporator and condenser housings. However, general support

maintenance may be called upon, at times, to perform any or all of the MAC items listed for organizational and direct

support maintenance for rehabilitation or overhaul of an air conditioner.

5-3. EVAPORATOR AND CONDENSER HOUSINGS

a. Repair

(1) Repairs are limited to rework of broken or cracked welds, straightening of bent or dented sheet metal,

replacement of lifting fittings, gaskets, insulation and plate nuts, and some small sheet metal parts by drilling out rivets

and installation of replacement parts.

(2) Disassemble unit as necessary and make repair as indicated.

(3) Insulation replacement

(a) Use only insulation identified in TM 5-4120-359-24P.

(b) Remove as much old insulation material as possible by pulling or scraping it away from the metal surface.

WARNING

Acetone and methyl-ethyl ketone (MEK) are flammable, and their vapors can be

explosive. Repeated or prolonged skin contact or inhalation of vapors can be

toxic. Use a well-ventilated area, wear gloves, and keep away from sparks or

flame.

stiff brush.

(d) Coat the mating surfaces of the metal and insulation with adhesive, item 12, Appendix E. Let both surfaces

air dry until the adhesive is tacky but will not stick to fingers.

(e) Starting with an end, carefully attach the insulation to the metal. Press into firm contact all over.

5-1