How to Repair a Jalousie Window Crank

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The slats of a jalousie window are operated by a crank.
The slats of a jalousie window are operated by a crank. (Image: old white jalousie image by Anatoly Tiplyashin from Fotolia.com)

Jalousie windows, also known as crank windows, come with their share of problems. One is the crank itself. It can become lose, stiff, or even stuck. This can cause the entire window to malfunction. However, a broken crank is not the end of the road for a jalousie window. With some time and patience, the window can be opening and closing smoothly once again.

Things You'll Need

  • Screwdriver
  • Multipurpose cleanser
  • Wire brush
  • Cloth

Remove the crank arm from the window. On most models, one or two screws hold the arm in place. Unscrew these with a screwdriver and keep them in a safe place.

Clean the now-visible gearbox with a cloth and simple multipurpose cleanser that will cut through grease. Use a wire brush to clean the nooks and crannies of the gears.

Turn the gears by hand to make sure each notch is connecting with a groove. Often, if the gears aren't aligned or if they are damaged, the whole gearbox system will not work.

Align the gears by tightening or loosening the screws that hold them in place. Make sure no dirt has become jammed in the gears, causing them to move out of place and preventing the window from opening and closing correctly. If a gear replacement is needed, contact the window manufacturer to order a new part. Look for the manufacturer's name on the bottom of the window, between the panes on the metal spacer.

Replace the crank arm by sliding it back over the gearbox. Reinstall the screws at the base of the crank arm.

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