TM 5-4220-233-14
SECTION II. OPERATOR/CREW PREVENTIVE MAINTENANCE CHECKS AND SERVICES
(PMCS)
Paragraph
Page
2-3
Preventive Maintenance Checks and Services (PMCS) ....................................2-4
2-3.
PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS).
To ensure that the Servicing Unit is ready for operation at all times, it must be inspected on a regular basis so
that defects may be found before they result in serious damage, equipment failure, or injury to personnel. This
section contains systematic instructions on inspections, adjustments, and corrections to be performed by the
operator/crew.
While performing PMCS, read and follow all safety instructions found in the Warning Summary at the front of
this manual. Keep in mind all WARNINGs and CAUTIONs.
a.Perform PMCS, found in Table 2-1, at the following intervals:
(1) Perform Before PMCS just before operating the trailer or the Compressed Gas System.
(2) Perform During PMCS while distributing breathing air from the Compressed Gas System.
(3) Perform After PMCS immediately after towing the Servicing Unit or after distributing breathing air from
the Compressed Gas System.
b.Reporting Repairs
All defects which the operator cannot fix must be reported on a DA Form 2404, Equipment Inspection and
Maintenance Worksheet, immediately after completing PMCS. If a serious problem Is found, IMMEDIATE-LY
report it to your supervisor.
c. General PMCS Procedures.
WARNING
Do not use dry cleaning solvent P-D-680 on any Compressed Air System components. Only use the
cleaning agents specified in Chapter 4, Section VII for cleaning Compressed Air System components.
Use of unauthorized cleaning agents could result in personnel Injury or death.
Dry cleaning solvent P-D-680 is toxic and flammable. Always wear protective goggles and gloves, and
use only In a welt-ventilated area. Avoid contact with skin, eyes, and clothes, and DO NOT breathe
vapors. DO NOT use near open flame, excessive heat or to clean breathing air components. The
solvent's flash solvent, Immediately get fresh air and medical help. If solvent contacts eyes,
immediately wash your eyes and get medical aid.
(1) Keep equipment clean. Dirt, oil, and debris may cover up a serious problem. Clean as you work and as
needed. For cleaning breathing air components of the Compressed Gas System refer to Chapter 4, Section
VII. DO NOT use tools from the trailer tool box or use solvent identified for the trailer components on
breathing-air components. Use dry cleaning solvent (Item 15, Appendix D) on all trailer metal surfaces. Use
soap and water on rubber, plastic, and painted surfaces.
(2) While performing specific PMCS procedures, inspect the following components.
(a) Bolts, Nuts, and Screws. Ensure that they are not loose, missing, bent, or broken. Report loose or
missing bolts, nuts, and screws to unit maintenance.
(b) Welds. Inspect for gaps where parts are welded together. Check for loose or chipped, paint, rust,
and cracks. Report bad welds to unit maintenance.
(c) Electric Conduit, Wires, or Connectors. Inspect for cracked or broken conduit insulation, bare
wires, and loose or broken connectors. Report loose connections, and faulty wiring to unit
maintenance.
(d) Hoses, Lines, and Fittings. Inspect for wear, damage, and leaks. Ensure that clamps and fittings
are tight. Report any damage, leaks, or loose fittings and clamps to unit maintenance.
(3) Check that components are adequately lubricated in accordance with Chapter 3, Section 1.
d.Specific PMCS Procedures.
(1). Operator/crew PMCS are provided in Table 2-1. Always perform PMCS In the order listed Once it
becomes a habit, anything that is not right can be spotted in a minute.
(2) Before performing PMCS, read all the checks required for the applicable interval and prepare all the
tools needed. Have several clean rags (Item 13, Appendix D) handy Perform ALL inspections at the
applicable interval
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