TM 10-4320-345-13 Table 2-1.  Operator Preventive Maintenance Checks and Services for Model TWDS20 - cont. ITEM INTERVAL LOCATION PROCEDURE NOT FULLY MISSION NO. ITEM TO CHECK/ CAPABLE IF: SERVICE 18 Before 20K Collapsible Perform "BEFORE'" PMCS in Fabric Tank accordance with the applicable TM. DISTRIBUTION POINT 19 Before Suction Hoses a.  Inspect hoses for cuts, tears and Hoses cut, torn crimped or deep abrasions. crushed. b.  Inspect for cracked and bent or Couplings cracked or broken couplings. broken. c.  Check for and straighten kinked hoses. d.  Inspect for crimped, collapsed or flattened hose. 20 Before 125 Gpm Pump Perform "BEFORE" PMCS in accordance with the applicable TM. 21 Before Discharge Hoses a.  Inspect hoses for cuts, tears and Hoses cut or torn. deep abrasions. Couplings cracked or b.  Inspect for cracked and bent or broken. broken couplings. c.  Check for and straighten kinked hoses. 22 Before Hypochlorina- Perform "BEFORE" PMCS in tion Unit accordance with the applicable TM 23 Before Gate Valves a.  Inspect for loose, broken, or Valve cracked, broken or (2-inch) missing hand wheel.  Rotate hand stuck. wheel.  Valve should turn freely. b.  Inspect valve body for cracks and external damage. c.  Inspect for cracked and bent or broken couplings. 24 Before Distribution a.  Inspect for bent or damaged nozzle Distribution nozzle Nozzles body and tube. damaged or defective. (1-1/2 inch) b.  Inspect for bent, broken, or stuck control handle. 2-16