TM 10-4610-242-13Section III. OPERATOR MAINTENANCE PROCEDURES3-4. COMPONENT REPLACEMENT.Removal of defective components from the assembled water system is accomplished by disconnecting the couplings atboth ends of the component and removing the defective item. Installation of replacement components is performed bypositioning the new component in the water system and connecting the couplings at both ends of the component.This task consists ofa. Removalb. InstallationINITIAL SET-UP:General Safety Instructions:Equipment Condition :Water system shutdown (para 2-12d)WARNINGTo prevent injury to personnel, all water pumps must be shutdown and water pressure relievedfrom discharge hoses before disconnecting couplings. Cap all open couplings to prevent watersystem contamination.NOTEReplacement of a typical 4-inch gate valve is shown. Replacement of all water system componentsis similar.a.Removal.Refer to figure 3-1.(1)Disconnect female coupling (1) from male coupling (2).(2)Disconnect female coupling (3) from male coupling (4).(3)Remove defective 4-Inch gate valve (5) from water system.(4)Install cap (6) on male coupling (4).(5)Install plug (7) in female coupling (1).b.Installation.Refer to figure 3-1.(1)Remove plug (7) from female coupling (1).(2)Remove cap (6) from male coupling (4).(3)Position replacement 4-inch gate valve (5) in water system.(4)Connect female coupling (1) to male coupling (2).(5)Connect female coupling (3) to male coupling (4).(6)Startup water system (para 2-12c) and check for leaks at 4-inch gate valve (5).3-26
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