TM 10-6640-233-10 Table 2-12. Operator Preventive Maintenance Checks and Services 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 2-12.  Operator  Preventive Maintenance Checks and Services (cont.) B - Before A - After M - Monthly D - During W - Weekly B D A W M 1 1 Trailer Walls Inspect skin surface for paint Wall skin, cracked, or damage, corrosion, cracks, or punctured. punctures. 2 Utilities Box a.   Inspect for condition and Box damage, missing security. rivets. b.   Inspect access door for Latches, keepers, defective or missing seals, or hinges dam- latches, keepers, seal, and aged or missing. hinge. c.   Check coupling assembly Defective coupling. for security and damaged threads. d.   Inspect gasket for condi- Defective gasket. tion and security. 3 Power Entrance a.   Inspect for damage to Panel damaged. Panel panel. b.   Inspect access doors for Latch, keeper, seal, or defective or missing latch, hinge damaged or keeper, seal, or hinge. missing. c.   Inspect power cable con- Defective connector. nector for loose and dam- aged pins. INTERVAL ITEM NO. ITEM TO BE INSPECTED Equipment is Not Ready/ Available Procedures Check for and have repaired or adjusted as necessary. 2-18