TM 10-4610-237-12Section III. OPERATOR MAINTENANCE PROCEDURES3.4COMPONENTREPLACEMENT.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 of:a. Removalb. InstallationINITIAL SET-UP:General Safety Instructions:Equipment Condition:Water system shut down (para. 2.9d)WARNINGTo prevent injury to personnel, the water pump mustbe shut down and water pressure relieved fromdischarge hoses before disconnecting couplings. Capall open couplings to prevent water systemcontamination.NOTEReplacement of a typical 2-inch gate valve is shown. Replacementof all water system components is 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 2-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 2-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)Start up water system (para. 2.9c) and check for leaks at 2-inch gate valve (5).(7)Refer unserviceable component to unit maintenance for repair.3-15
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