TM 5-3825-225-14&P WARNING 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. b. 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. c. If something doesn't work, troubleshoot it following the instructions in this manual or notify your supervisor. d. 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. e. 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. f. 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 loose. (2) 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. (3) Electric  wires  and  connectors.   Tighten  loose  connections  and  ensure  that  the  wires  are  in  good condition. (4) 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. g. For classification of LEAKAGE, refer to paragraph 2-4. Table 4-1.  Unit Preventive Maintenance Checks and Services (PMCS). Q - Quarterly S - Semiannual ITEM INTERVAL ITEM TO BE NO. Q S INSPECTED PROCEDURES NOTE 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. 1 WIRING Check wires and connectors for correct assembly and good con- (see Figures 4-2 and 4-3). 2 KINGPIN AND FIFTH WHEEL Lubricate kingpin and fifth wheel plate (see Chapter 3, Sec- PLATE tion I). 4-6