TM 10-5430-243-12&P 0019 00 Change 1 0019 00-4 Table 1.  Unit Preventive Maintenance Checks and Services For 20,000 and 50,000 Gallon Collapsible Water Storage Tanks. NOTE Within designated intervals, these checks are to be performed in the order listed. ITEM NO. INTERVAL MAN- HOUR ITEM TO BE CHECKED OR SERVICED PROCEDURE EQUIPMENT NOT READY/ AVAILABLE IF: 1 Before Tank (1) Inspect for tears or punctures. Torn or punctured. 2 Before Filler/Discharge Gate Valve (2) or Ball Valve (3) Check for bent or binding stem, broken hand-wheel or handle. Stem, hand- wheel or handle are damaged or missing. 3 Before Drain Ball Valve (4) Check for bent or binding stem or broken handle. Stem or handle are damaged or missing. 4 Before Vent Fitting   Assembly (5) Check for evidence of damage or missing parts.   Check the vent cap for cleanliness and freedom of operation.  Check if the vent cap gasket, flat rubber gasket or cam- lever arms are damaged or missing. Vent cap is damaged or missing.  Vent cap gasket, flat rubber gasket or cam-lever arms are damaged or missing. 5 Before Filler/Discharge Assembly (6) (GTA Container Model) or Filler/Discharge Assembly (7) (Reliance and MPC Models) Check for evidence of damage.  Check if cam- lever arms are damaged or missing.  Check if the elbow body is cracked or sealing surface is badly dented.  Check for loose, damaged or missing screws and gaskets. Cam-lever arms are damaged or missing.  Elbow body is cracked.   Elbow sealing surface is badly dented.  Hard- ware damaged or missing. 6 Before Drain Fitting Assembly (8) Check drain plug, drain hose, and drain ball valve, for damaged or missing parts. Drain plug, hose, or ball valve missing, not connected, or damaged. 7 During Tank (1) Inspect for tears, leaks, or punctures (exclude weeping/wicking where the tank seams are not involved and droplets do not form or run down the side of the tank). Tank has tears or punctures that cannot be repaired.