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TM 5-4120-377-14
CHAPTER 3
OPERATOR’S MAINTENANCE INSTRUCTIONS
Section I LUBRICATION INSTRUCTIONS
The Model F18T4-2S and Applied Model 3788 Air Conditioner and their 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 in a single container; sealed bearings are incorporataed in the drive motor; and the
compressor crankcase contains a lifetime charge of oil. Sealed bearings are incorporated in the evaporator and
condenser fan motor.
The only operator lubrication required is that necessary to relieve stiffness or binding of the louver blades in the
evaporator intake and discharge grilles or the turn button fasteners associated with thefabric cover on the back of
the cabinet. Sparingly apply a light machine oil 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 organizational
maintenance for appropriate action.
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