Section III. OPERATOR MAINTENANCE PROCEDURES
13-4. COMPONENT REPLACEMENT (QUICK DISCONNECT COUPLINGS).
Removal of defective components from the assembled water system is accomplished by disconnecting the
coupling at both ends of the component and removing the defective item. Installation of replacement
components is performed by positioning the new component in the water system and connect the coupling at
both ends of the component
This task consists of: a
General Safety Instructions:
Water system shutdown (para 2-13d)
To prevent injury to personnel, all water pumps must be shutdown and water pressure relieved from discharge
hoses before disconnecting couplings. Cap all open couplings to prevent water system contamination.
Replacement of a typical 4-inch gate valve is shown. Replacement of all water system
components having quick disconnect couplings is similar.
Removal. Refer to figure 3-2.
Disconnect female coupling (1) from male coupling (2).
Disconnect female coupling (3) from male coupling (4).
Remove defective 4-inch gate valve (5) from water system.
Install cap (6) on male coupling (4).
Install plug (7) in female coupling (1).
Installation. Refer to figure 3-2.
Remove plug (7) from female coupling (1).
Remove cap (6) from male coupling (4).
Position replacement 4-inch gate valve (5) in water system.
Connect female coupling (1) to male coupling (2).
Connect female coupling (3) to male coupling (4).
Startup water system (para 2-13c) and check for leaks at replaced component.