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TM 10-6640-215-13 4-7.  UNIT PREVENTIVE MAINTENANCE CHECKS AND SERVICES- continued. (2)  Bolts, nuts and screws:  Check that they are not loose, missing, bent or broken.  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 that you find loose. (3)  Welds:  Look for loose or chipped paint, rust or gaps where parts are welded together.  If you find a bad weld, report it to you supervisor. (4)  Electric wires and connectors:  Look for cracked or broken insulation, bare wires and loose or broken connectors.  Tighten loose connections and make sure the wires are in good condition. (5)  Hoses and fluid lines; Look for wear, damage, and leaks.  Make sure 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,  either  correct  it  or report it to direct support maintenance (refer to MAC). e. It  is  necessary  for  you  to  know  how  fluid  leaks  affect  the  status  of  your  equipment.    The  following  are definitions of the types/classes of leakage you need to know to be able to determine the status of your equipment. Learn and be familiar with them and REMEMBER WHEN IN DOUBT, NOTIFY YOUR SUPERVISOR. Leakage definitions for unit PMCS CLASS I Seepage of fluid (as indicated by wetness or discoloration) not great enough to form drops. CLASS II Leakage  of  fluid  great  enough  to  form  drops  but  not  enough  to  cause  drops  to  drip  from  the  item  being checked/inspected. CLASS III Leakage of fluid great enough to form drops that fall from the item being checked/inspected 4-8.  PMCS PROCEDURES. Specific procedures for performance of preventive maintenance checks and services are given in Table 4-1. Individual Equipment Unit PMCS.  Unit PMCS procedures for equipments covered by their own individual TMs will be outlined in those TMs.  (Refer to Appendix A for TM numbers). 4-5


 


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