TM    10-4610-232-12 Table  4-1.  Unit  Preventive  Maintenance  Checks  and  Services Item No. 8. 9. 10. 11. Interval Semi- Annual Semi- Annual Semi- Annual Semi– Annual Item To Be Checked Or Serviced Raw Water Pump) Frame, Cyclone Separator Frame and Distribution Pump Assembly Van Panels, Electrical External Cable Assemblies COEI and Bll) High Pressure Pump Assembly Procedure Check for loose and missing hardware and rigidity of assembly by manually grasping and shak- ing the frame. Check for unusual vibration, broken welds and bent rails. a. Check van panel external eIectrical panels for water leak- age and loose mountings (para. 4-33 to 4-35). b. Remove threaded connectors. Check for corroded, burnt or mis- sing pins and inserts. c. Check MOVs for damage and continuity. a. Check for cuts, cracks, dry rot and damaged connectors. b. Inspect for corroded, burnt, loose or missing cable pins and inserts. c. Check connector boots for signs of looseness and water re- sistance in and on connector. Seal with silicone sealant as re- quired (Appendix E). a. Check for missing, loose or damaged drive belt guard hard- ware and straight edge. b. Check for loose or missing hardware and rigidity of assembly by manually shaking the frame. Check for unusual vibration, bro- ken welds and bent rails. Check tie down straps for damage and dry rot. Replace tie down straps every two years. c. Check pump and motor pul- leys for wear, cracks and dam- age. Not Mission Capable  If: Any component is dam- aged, loose, missing or broken. Any pin or insert severely burnt,   missing   or   cor- roded. No continuity exists. Any cable has dry rotted insulation that will expose wires or shorting. Any cable damaged or missing and no replace- ment. Any component is bro- ken, loose, missing or damaged Any  pulley  damaged  or missing. 4-6   Change   2