TM 9-4120-404-14
CHAPTER 4
DIRECT SUPPORT MAINTENANCE INSTRUCTIONS
Section I. REPAIR PARTS, SPECIAL TOOLS, TEST, MEASUREMENT, AND
DIAGNOSTIC EQUIPMENT (TMDE), AND SUPPORT EQUIPMENT
4-1. COMMON TOOLS AND EQUIPMENT. For authorized common tools and equipment, refer to the Modified Table of
Organization and Equipment (MTOE) applicable to your unit.
4-2. SPECIAL TOOLS, TMDE, AND SUPPORT EQUIPMENT. No special tools are required for maintenance of the
equipment. Test, Measurement, and Diagnostic Equipment (TMDE) and Support Equipment include standard equipment
found in any maintenance shop.
4-3. REPAIR PARTS. Repair parts are listed and illustrated in the Repair Parts and Special Tools List (RPSTL), TM
9-4120-404-24P, covering unit, direct support, and general support maintenance for this equipment.
Section II. DIRECT SUPPORT TROUBLESHOOTING PROCEDURES
4-4. GENERAL.
a. Table 4-1. contains Direct Support troubleshooting information for location and correcting most of the operating
troubles which may develop in the air conditioner and can be repaired at the direct support maintenance level. Each
malfunction for an individual component, unit, or system is followed by a list of tests or inspections which will help you to
determine probable causes and corrective actions to take. You should perform the tests/inspections and corrective
actions in the order listed.
b. This manual cannot list all malfunctions that may occur, nor all tests or inspections and corrective actions, If a
malfunction is not listed or is not corrected by listed corrective actions, notify your supervisor.
c. The following malfunction index is provided to assist you in locating malfunctions within this table.
MALFUNCTION
PAGE NO.
Discharge pressure too high ........................................................................ 4-2
Discharge pressure too low ......................................................................... 4-2
Suction pressure too high ............................................................................ 4-2
Suction pressure too low ............................................................................. 4-3
4-1
