Section IV. UNIT PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS)
4-16. INTRODUCTION, INSPECTION, AND SERVICE.
a. Systematic, periodic, Preventive Maintenance Checks and Services (PMCS) are essential to ensure that the
trailer-mounted air conditioner with power is ready for operation at all times. The purpose of a preventive maintenance
program is to discover and correct defects and deficiencies before they can cause serious damage or complete failure of
the equipment. Any effective preventive maintenance program must begin with the indoctrination of operators to report all
unusual conditions noted during daily checks or actual operation to unit maintenance. All defects and deficiencies
discovered during maintenance inspections must be recorded, together with corrective action taken, on DA Form 2404
(Equipment Inspection and Maintenance Worksheet).
b. A schedule for unit preventive maintenance inspection and service should be established immediately after
installation of the trailer-mounted air conditioner with power. A quarterly interval, equal to 3 calendar months or 250 hours
of operation (whichever occurs first), is recommended for usual operating conditions. When operating under unusual
conditions, such as a very dusty or sandy environment, it may be necessary to reduce the interval to monthly, or even less
if conditions are extreme.
c. Table 4-2 lists the unit preventive maintenance checks and services that should be performed at quarterly (or
otherwise established) intervals. The PMCS items in the table have been arranged and numbered in a logical sequence
to provide for greater personnel efficiency and least amount of required maintenance downtime.
Table 4-1. Unit Preventive Maintenance Checks and Services (PMCS).
Item To Be
The PMCS contained in this table apply to only those items peculiar to the
trailer mounted, generator-set powered, air conditioner. Refer to the
following technical manuals for component PMCS.
Refer to TM 5-4120-384-14.
Refer to TM 5-6115-585-12.
Refer to TM 9-2330-202-14&P