TM 10-4320-303-13WARNINGEnsure opening of pressure relief valve assembly (4) faces downline frompressure-reducing valve assembly (3). Failure to do so may result in personalinjury.NOTEInlet connection can be determined by observing the diaphragm rod.c. Install pressure relief valve (4) on inlet connection (6) of pressure-reducing valve assembly (3) usinggrooved-end pipe quick disconnect coupling (5) (para 2.3.3.2) as shown in figure 2-34.d. Connect upline hoseline length (7) to pressure relief valve (4) with 6 inch grooved pipe coupling (1)(para 2.3.2.2).e. Connect downline hoseline length (8) to outlet connection (9) on pressure- reducing valve assembly(3) with grooved-end pipe quick disconnect coupling (2).f. Place all isolation cock valves (10) to open position.2.4 INITIAL ADJUSTMENTS, CHECKS, AND SELF TEST. There are no initial adjustments, checks or selftests other than the BEFORE (B) PMCS. Perform all BEFORE (B) PMCS prior to operating the TWDS.2.5 OPERATINGPROCEDURES. The operating procedures for the TWDS are provided in paragraphs 2.5.1through 2.5.5.2.5.1 TWDSGeneralOperatingProcedures.This paragraph provides general instructions for operation ofthe entire TWDS under usual conditions. Detailed instructions for operation of each major component will beprovided in paragraphs 2.5.2 through 2.5.5.CAUTIONIf suction pressure falls below 10 psi or if discharge pressure rises above 150psi, damage can result to pump.a. When packing hoseline, monitor suction and discharge pressures on pumps, refer to applicabletechnical manual for location of pump suction and pump discharge gauges for the 600 GPMpumping assembly. If pressure is to low or too high, IMMEDIATELY shut down pumps, refer toapplicable technical manual for procedures to shut down 600 GPM pumping assembly. Notifysupervisors on hose laying crews and operators at other pumping stations who are packing hoseline.Cease operation until problem is corrected.CAUTIONTrapped air can cause hoseline to collapse and pressure at downlinepumping stations to fall below 10 psi.To prevent damage to pump, take precautions to vent air from hoseline.b. As hose-laying crews connect major components, prepare TWDS for operation by packing hoseline.As soon as lead pumping station and first boost pumping station are installed and connected byhoseline, perform the following steps:(1) Refer to applicable technical manual for location of pump suction and pump dischargegauges for the 600 GPM pumping assemblies. Turn petcock on boost pump discharge elbowto the left, until fully opened. This will2-75
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