Chapter 3. OPERATOR MAINTENANCE

TM 5-4120-393-14

CHAPTER 3

OPERATOR MAINTENANCE

Section I LUBRICATION INSTRUCTIONS

3-1. General. The air conditioner and its major components are designed so that very little lubrication is required during

their serviceable lifetime. The refrigerant compressor and its drive motor are hermetically sealed; sealed bearings are

incorporated in the drive motor; and the compressor crankcase contains a lifetime charge of oil. Sealed bearings are also

incorporated in the evaporator and condenser fan motors.

a. Lubrication. The only operator lubrication required is that necessary to relieve stiffness or binding of the louver

blades and discharge grilles. Sparingly apply a lubricating oil (Appendix E, item 14) and work it into the joints or pivots

involved. Blot up all excess oil with a cloth or paper towel. Report stiffness or binding of all other operational controls to

unit maintenance for appropriate action.

3-1