TM 10-6640-239-13 2-35 Table 2-12.  Operator Preventive Maintenance Checks and Services (PMCS) - CONT NOTE If  equipment  must  be  kept  in  continuous  operation,  only  do  procedures  that  can  be performed without disturbing operation.  Make the complete checks and services when equipment can be shut down. BE – Before AF – After MO - Monthly DU- During WE – Weekly Interval Item No. B E D U A F W E M O Item to Inspect Procedures Not Fully Mission Capable If: 21 Water Pressure Switch Check for proper starting and stopping of water pump. Pump does not operate automatically at the set pressure settings. 22 a. Inspect for proper operation. Water is not hot.         Water Heater b. Inspect for leaks. Class III leaks detected. 23 a.   Inspect for damage. Missing screws. Automatic Distillation Apparatus b.   Inspect operation. Apparatus is damaged or inoperative. 24 a. Inspect mounting. Loose or missing mounting bolts. b. Inspect for leaks. Class III leaks detected.     Still c.   Inspect for improper operation caused by scale or crud buildup. Still is inoperative. 25 a.   Inspect mounting. Loose or missing mounting bolts.     b.   Inspect for leaks. Class III leaks detected. Water Purification Unit c.   Inspect for proper operation. Inoperative water purification unit. 26 a.   Inspect condition. Loose or missing bolts or missing parts. Pour, Cloud and Freeze Point Apparatus b.   Inspect for proper operation. Inoperative apparatus. 27 a. Inspect mounting. Loose or missing mounting bolts.     b. Inspect for leaks. Class III leaks detected.     Evaporation Loss Bath c. Inspect for proper operation.   Inoperative bath. 28 a. Inspect for damage. Missing or damaged parts. Titrator b. Inspect for proper operation.   Inoperative titrator.