14For edging (when using the line head cutting attachmentwith EZ-Link™ models), lock the release button of thecutting attachment into the 90° edging hole or the 180°edging hole (Fig. 21).OPERATING THE EZ-LINK™ SYSTEMThe EZ-Link™ system enables the use of these optionalAdd-Ons:Blower/Vacuum . . . . . . . . . . . . . . . . . . . . . . . . . . BV720rCultivator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GC720rEdger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . LE720rHedge Trimmer . . . . . . . . . . . . . . . . . . . . . . . . . . HS720rSnow Thrower . . . . . . . . . . . . . . . . . . . . . . . . . . . ST720rStraight Shaft Trimmer . . . . . . . . . . . . . . . . . . . . SS725rTree Pruner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TP720rTurbo Blower . . . . . . . . . . . . . . . . . . . . . . . . . . . . TB720rRemoving the Cutting Attachment or Add-Ons1. Turn the knob counterclockwise to loosen (Fig. 19).2. Press and hold the release button (Fig. 19).3. While firmly holding the upper shaft housing, pullthe cutting attachment or add-on straight out of theEZ-Link™ coupler (Fig. 20).Installing the Cutting Attachment or Add-OnNOTE: Place the unit on the ground or on a work benchto make add-on installation or removal easier.1. Turn knob counterclockwise to loosen (Fig. 19).Fig. 19EZ-Link™ Coupler Release ButtonGuide RecessKnobPrimary HoleUpper Shaft HousingEZ-Link™ Coupler2. While firmly holding the add-on, push it straight intothe EZ-Link™ coupler (Fig. 20).NOTE: Aligning the release button with the guide recesswill help installation (Fig. 19).3. Turn the knob clockwise to tighten (Fig. 21).Fig. 20Fig. 21KnobLower Shaft HousingRelease Button90˚ Edging Hole(Trimmer Only)180˚ Edging Hole(Trimmer Only)OPERATING INSTRUCTIONSPrior to operation,read and understandthe operator’s manual for the add-on to beused with this unit.WARNING:To avoid seriouspersonal injury anddamage to the unit, shut the unit off beforeremoving or installing add-ons.WARNING:The add-ons with thecoupler system is tobe used in the primary hole only. Using thewrong hole could lead to personal injury ordamage to the unit.CAUTION:Lock the releasebutton in the primaryhole (Fig. 20) and securely tighten the knobbefore operating this unit.CAUTION: