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 FLAKING BOX 35 During Discharge Hoses a.  Inspect hoses and coupling clamps Class III leak. for leaks b.  Check hoses for kinks Straighten hoses. c.  Check that hose is not twisted. 36 During Swivels Inspect for leaks at coupling clamps Class III leak. and swivel body. 37 During ROADWAY a.  Inspect crossing guard for Hoseline damaged. CROSSING evidence of crushing caused by GUARDS heavy vehicles. b.  Check for hoseline damage at crossing guard. 38 During SUSPENSION KITS a.  Inspect suspended hoses for leaks. Class III leak. b.  Check security of suspension components. 39 During PRESSURE Inspect valve body and coupling' Valve will not reduce REGULATING clamps for leaks. system pressure.  Class III VALVE leak. 40 During PRESSURE RELIEF Inspect valve body and coupling Class Ill leak. VALVE clamps for leaks. STORAGE ASSEMBLY 41 During Tee Inspect tee and coupling clamps for Class III leak. Leaks. 42 During Gate Valves Inspect for leaks at valve stem, flange Class III leak. (4-inch) gaskets and couplings. 43 During Discharge Hoses a Inspect hoses for leaks and loose Class Ill leak. or unlocked couplings. b.  Check hoses for kinks Unkink hoses. 44 During Water Meter a.  Inspect for proper operation of meter indicator. b.  Inspect for leaks at flange gaskets and couplings. 2-18