TM 9-4120-407-14
CHAPTER 3
UNIT MAINTENANCE INSTRUCTIONS
SECTION I LUBRICATION INSTRUCTIONS
3-l. 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 evaporator
air discharge and return grille louvers, the condenser air damper vanes and control linkages 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
3-2. GENERAL.
a . Common Tools and Equipment. For authorized common tools and equipment refer to the Modified
Table of Organization and Equipment (MTOE), CTA 50-970, OR CTA 8-100, as applicable to your Unit.
b. Special Tools, TMDE, and Support Equipment. The only special tool or equipment required is the logic
box test fixture (94833) 111K8002-1. Refer to maintenance allocation chart Appendix B for authorized
maintenance tasks at unit, Direct Support, and General Support Maintenance levels and the TMDE and
support equipment required to perform the tasks.
c. Repair Parts. Repair parts are listed and illustrated in TM 9-4120-407-241, covering Unit, Direct
Support, and General Support Maintenance for this equipment. Appendix G includes all mandatory
replacement parts required to maintain the air conditioner in mission ready status.
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