Dont replace your casement window if it wont open or shut completely. You can usually replace a bad crank in an hour, and have it working smooth. EHow Auto gets you on the fast track with repair, maintenance, and shopping advice. Whether youre jump starting a battery or insuring a new car, we can help. How-to-Window-Air-Conditioning-Installation-Heat-pump-or-standard-AC-Unit.jpg' alt='How To Install Window Air Conditioner In Crank Window Parts' title='How To Install Window Air Conditioner In Crank Window Parts' />Photo 3 Remove the trim and crank. Back out the trim screws and lift the casement cover off the window jamb. Remove all crank mounting screws and lift off the crank. Replace rusted or bent trim screws. Photo 4 Buy and exact match. Compare the new operator with the old to make sure they match. Photo 5 Install the new crank. Line up the new crank with the old holes. The old screw holes are often stripped. If so, stick a toothpick or two in them as filler and drive the screws. Then reattach the crank arm and casement cover. If your window crank handle just spins when its turned, or it cant pull in the sash far enough to engage the lock, chances are the gears are stripped and its time for a new crank mechanism. Replacing the crank mechanism is simple. But finding a new crank may take some time. You can mail your old crank to some replacement hardware specialists and youll get back a match Photo 1. SId5j9zcMZA/hqdefault.jpg' alt='How To Install Window Air Conditioner In Crank Window Parts' title='How To Install Window Air Conditioner In Crank Window Parts' />The cranks can be expensive, but they may be a bargain if the overall condition of the window is still good. Start by inspecting the old crank operator and handle for wear. If the teeth are missing inside the crank handle, simply replace it at home centers and full service hardware stores. But if the operator has broken or worn parts Photo 1, replace the entire operator mechanism. Your operator may vary slightly from the one we show. However, the replacement process is similar. The first step is to disconnect the crank arm from the guide track. Take out the screen and crank the window open until the plastic guide bushing aligns with the guide track notch Photo 2. Next, look for trim mounting screws inside the screen track. Unscrew them to remove the casement cover and access the crank innards Photo 4. If there arent any trim screws, the casement cover is probably nailed or stapled in place. Slide a stiff putty knife between the window jamb and casement cover. Carefully pry up the casing so you dont damage the wood parts. Close the window and lock it until the new crank arrives. Compare the new operator with the old, making sure they match. Install the new crank as shown in Photo 5. Required Tools for this Project Have the necessary tools for this DIY project lined up before you startyoull save time and frustration. Adobe Acrobat Reader For Mac Safari Update on this page. Required Materials for this Project Avoid last minute shopping trips by having all your materials ready ahead of time.