TM 10-6640-215-13 NOTE If   the   equipment   must   be   kept   in   continuous   operation,   check   and service those items that can be checked and serviced without disturbing operation. Make the complete checks and services when the equipment can be shut down. Table 2-1.  Operator Preventive Maintenance Checks and Services Item Interval Item To Check Procedure Not Fully Mission No. Service Capable If: Semi-Trailer Exterior 1 Before Utility Box Check coupling assembly for se- Defective coupling. curity and damaged threads. 2 Before Power Entry a.  Inspect for damage to panel. Panel damaged. Panel b.  Inspect power cable connec- Defective connector. tor for loose and damaged pins. c.  Check ground cable is prop- Grounding connections erly connected to ground lug and are damaged. grounding rod. 3 Before Power Cable Inspect cable for damaged con- Cable damaged. nector, cuts, and deep abrasions. Latches, keepers, seals, and hinges damaged or missing. 4 Before Purge Exhaust Inspect access doors for defec- Doors tive or missing latches, keepers, seals, and hinges. 5 Before Emergency Inspect for operation. Lights not operating. Lights 6 Before Purge Intake Inspect access doors for defec- Latches, keepers, seals, Doors tive or missing latches, keepers, and hinges damaged or seals, and hinges. missing. 7 Before Mechanical Inspect dampers and motors for Motor does not operate. Room, ECU In- operation. takes 8 Before Air Compressor a.  Check for loose mounting Missing mounting bolts. bolts. b.  Check crankcase oil level. Low oil level. c.  Check intake filter for ob- Clogged or dirty filter. structions. 2-32