How do you replace a casement window sash?

Step #1: Sash Removal

• Remove screen and grille (if any) and crank sash fully open (ninety degrees).
• Remove and save "operator arm to drag link" 'E' clip. Be careful not to damage clip when removing.
• Note how upper and lower stabilizer arm screws and bushings are installed at head and sill.
• Remove and save upper and lower stabilizer arm screws and bushings.
• Remove and save "stop" crew from upper track.
• Crank operator handle to retract operator arm fully under wood sill cover.
• Keeping sash straight out and straight up, slide sash toward the strike side of the window unit until top and bottom slide shoes disengage from tracks.
• Lay damaged sash on flat surface.
• Note how hinge linkage is installed on both top and bottom of sash and note location of lock strike.
• Remove hinge linkage from damaged sash and reinstall on new sash at same locations as old sash.
• Note: If replacement sash provides a new lock strike, install it and discard it with damaged sash, otherwise, remove lock strike from damaged sash and reinstall at same location on new sash.

Step #2: Sash replacement:

• With hardware installed on new sash, position sash bottom on sill and position top slide shoe onto upper track at strike side of window unit.
• Repeat for bottom slide shoe.
• Keeping sash straight out and straight up, slide the sash to approximately 3" from hinge side of window unit.
• Reinstall sash stop screw to upper track.
• Reattach top and bottom stabilizer arms using the screws and bushings from damaged sash.
• Crank operating handle until operator arm is positioned so the draglink can be placed over the pin at the end of the operator arm.
• Reinstall 'E' clip.
• With lock latch open, crank sash to closed position and lock the latch. Reinstall grille and screen (if any).