TM 5-4320-302-14Table 4-1. Organizational Preventive Maintenance Checks and ServicesW-WeeklyQ-QuarterlyM-MonthlyS-SemiannuallyINTERVALITEMNO.WMQSITEM TO BE INSPECTEDPROCEDURES9Check ValveInspect check valve body assembly for cracks or damagedAssemblythreads. Check that attaching hardware is tight and free ofcorrosion.Inspect check valve assembly for evidence of leakage or gasketdamage, and presence of outer check valve weight. Machinescrew should be tight. All components must be free of corro-sion. When in closed position, check valve gasket flappermust make an airtight seal on pump outlet. Be sure valvegasket flapper is free to open with pump flow.4-24
Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business