TM 9-4120-402-14
UNIT MAINTENANCE INSTRUCTIONS - continued
Paragraph
Evaporator Fan..........................................................................................................................................
Evaporator and Condenser Fan Motor (B2)and Condenser Fan .................................................................
Condenser Coil Cleaning ..........................................................................................................................
Solenoid Valve (L1 ) Coil ...........................................................................................................................
Evaporator Coil Cleaning ...........................................................................................................................
Condensate Drain Traps ............................................................................................................................
Preparation for Storage..............................................................................................................................
Section I LUBRICATION INSTRUCTIONS
4-1. UNIT LUBRICATION.
a.
General. The refrigerant compressor and its drive motor are hermetically sealed in a canister. The
compressor is supplied with a complete charge of oil and requires no lubrication. The evaporator and condenser fan
motors also have permanently lubricated, sealed bearings. No lubrication of these items is required.
b.
Mechanical Lubrication. The only mechanical items which may require lubrication are the conditioned air
discharge and intake grille louvers and the devices which operate the fresh air damper door. These points should be
checked and lubricated, as necessary, during preventive maintenance service. A few drops of light oil should be applied
to pivot points, bearing surfaces, and linkages to prevent or eliminate stiffness or binding. Be sure to wipe off all excess
oil with a cloth or paper towel. These items are in an area of high volume airflow and excess oil will tend to attract and
accumulate dust particles from the passing air. Graphite may be used as an alternate
lubricant during extreme cold weather operation.
Section II REPAIR PARTS, SPECIAL TOOLS, TEST, MEASUREMENT, AND DIAGNOSTIC
EQUIPMENT (TMDE), AND SUPPORT EQUIPMENT
4-2. GENERAL.
a.
Repair parts are listed and illustrated in TM 9-41 20-402-24P. No special tools are required for maintenance
of the equipment. Test, maintenance, and diagnostic equipment (TMDE), and support equipment include standard
electrical test equipment found in any unit maintenance electric shop.
b.
For authorized common tools and equipment refer to the Modified Table of Organization and Equipment
(MTOE) applicable to your unit.
4-2
