Dry cleaning solvent P-D-680 is toxic and flammable. Always wear protective goggles and
gloves, and use only In a well-ventilated area. Avoid contact with skin, eyes, and clothes, and
DO NOT breathe vapors. DO NOT use
near open flame or excessive heat. The solvent's flash point Is 100°F-130°F (38°C -59°C). If you
become dizzy while using cleaning solvent, Immediately get fresh air and medical help. If
solvent contacts eyes, immediately wash your eyes and get medical aid.
Keep your vehicle clean. Dirt, grease, oil, and debris only get in the way and may cover up a serious
problem. Clean as you work and as needed. Use dry cleaning solvent (Item 7, Appendix D) to clean metal surfaces.
Use soap and water when you clean rubber or plastic material.
If something doesn't work, troubleshoot it following the instructions in this manual or notify your supervisor.
Always do your PMCS in the same order so it gets to be a habit. Once you've had some experience, you'll
quickly spot anything wrong.
If anything looks wrong and you can't fix it, write it down on your DA Form 2404. If you find something
seriously wrong, report it to direct support maintenance as soon as possible.
While performing PMCS, inspect the following components:
(1) Bolts, nuts, and screws. Check for loose, missing, bent or broken hardware. You can't try them all
with a tool, of course, but look for chipped paint, bare metal, or rust around bolt heads. Tighten any hardware you find
Welds. Look for loose or chipped paint, rust, or gaps where parts are welded together. If you find a
bad weld, report it to direct support maintenance.
Electric wires and connectors. Tighten loose connections and ensure that the wires are in good
Hose and fluid lines. Look for wear, damage, and leaks. 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. Tighten all loose fittings or
connectors. If something is broken or worn out, take corrective action or report to direct support maintenance.
For classification of LEAKAGE, refer to paragraph 2-4.
Table 4-1. Unit Preventive Maintenance Checks and Services (PMCS).
Q - Quarterly
S - Semiannual
ITEM TO BE
Perform operator/crew PMCS prior to or In conjunction
with unit PMCS If:
a. There is a delay between the daily operation of the
equipment and the unit PMCS.
b. Regular operator is not assisting/participating.
Check wires and connectors for correct assembly and good con-
(see Figures 4-2 and 4-3).
Lubricate kingpin and fifth wheel plate (see Chapter 3, Sec-