TM 9-2330-247-14&P
4-10. GENERAL PMCS PROCEDURES (Con't)
Hoses and Fluid Lines. Look for wear, damage, and leaks and ensure that clamps and fittings are tight. Wet spots show
leaks, of course, but a stain around a fitting or connector can mean a leak. If a leak comes from a loose fitting or
connector, tighten it. If something is broken or worn out, replace.
LEAKAGE DEFINITIONS
It is important to know how fluid leakage affects the status of the trailer. Following are types/classes of leakage you
must know to determine whether the trailer is mission-capable. Learn these leakage definitions. When in doubt, notify
your supervisor.
Leakage Definitions for Organizational PMCS
Class I
Seepage of fluid (as indicated by wetness or discoloration) not
great enough to form drops.
Leakage of fluid great enough to form drops, but not great enough
Class II
to cause drops to drip from item being inspected.
Leakage of fluid great enough to form drops that fall from item being
Class Ill
inspected.
CAUTION
Equipment operation Is allowed with minor (Class I or II) leakage. Fluid levels in an
item/system affected with such leakage must be checked more frequently than
required in PMCS.
Correct Class Ill leaks before releasing equipment for operation.
4-12.
SPECIFIC PMCS PROCEDURES
Always do your PMCS in the same order so it gets to be a habit. Once you've had some practice, you'll spot anything
wrong in a hurry.
If the trailer doesn't work properly and you can't see what is wrong, refer to Section IV of this chapter for troubleshooting
instructions.
Before performing preventive maintenance, read ail the checks required for the applicable interval and prepare all
tools needed to make all checks. Have several clean rags (Item 11, Appendix E) handy. Perform ALL inspections at the
applicable intervals.
4-13.
PMCS COLUMN DESCRIPTION
Item No. The order in which PMCS should be performed. The number in this column shall be used as a source of item
numbers for the "TM ITEM NUMBER" column on DA Form 2404 when recording results of PMCS.
Interval. Tells you when to do a certain check or service.
Procedures. Lists system and common names of items that are to be inspected and tells you how to do the required
check or service.