b'SPRING RETURN HANDLEa. Use caution when tightening the hex nuts as the spring coil (item 5) is under increasing pressure.4.Slide the handle sleeve (item 6) over the spring rod (item 4) and spring coil (item 5) and fully thread it into the anchor handle (item 2).5.Check to see that the handle operates freely and correctly by rotating it several times making sure the handle rotates the complete 90 degrees to fully spring open or closed, depending on how it is set up, while on the valve.6.If the handle still does not fully spring open or closed, depending on how it is set up, repeat steps 1 - 5 of the Increasing the Spring Return Force section until the valve can fully spring open or closed freely on its own.2 . 0 M A I N T E N A N C E2.1 GENERALAfter the Spring Return Handle and valve assembly is installed it is recommended that the operation of the Spring Return Handle be checked periodically to ensure it continues to operate correctly.Parts from different suppliers should NOT be interchanged. Use only Flowturn replacement parts.2.2 TOOLSAlways be sure that the valve is de-pressurised and isolated prior to performing any maintenance work. Do not attempt to repair valve in-line if volatile, dangerous, hazardous or flammable service.If the spring return handle is altered in any way, no liability can be accepted by Australian Pipeline Valve.No special tools are required for the maintenance and installation of Flowturn Spring Return Handle.8 Australian Pipeline Valve - Installation, Operation and Maintenance Manual'