How to Clean a Casement Window Mechanism

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Casement windows are natural successors to stone mullioned windows, which were the first use of glass as a window material. Basement casement windows consist typically of a single pane and may open at the bottom, top or side. Above-ground casements are generally taller than they are wide and often consist of several small panes supported by glazing bars. Casements are hinged and open using a crank mechanism, which can become clogged with dirt and dust. A thorough cleaning usually gets everything working smoothly again.

Things You'll Need

  • Screwdriver
  • Bowl
  • Toothbrush
  • Wire brush
  • Dish liquid
  • Sh0p cloths
  • Lubricant
  • Open your casement windows as far as they will go. Remove the screws holding the arm in place and set them aside in a small bowl.

  • Remove the crank handle. This process differs between window brands, so you will have to examine the crank handle to see how it is attached to the crank mechanism.

  • Clean the inside of the crank handle seating with a small toothbrush. Clean any dust or dried-out lubricant on the crank arm with a wire brush.

  • Soak the crank handle, crankshaft and both parts of the arm mechanism in hot water that has a squirt of dish liquid dissolved in it. Dry all of the parts thoroughly with lint-free shop cloths.

  • Lubricate the crankshaft and arm mechanism with the same type of lubricant that was originally used. This is usually automotive grease rather than a spray lubricant.

  • Scrub the screws with a toothbrush to make sure there is no dust or grease embedded in the threads and reassemble the arm mechanism. Replace the crank handle on the shaft.

  • Lubricate the crank shaft and arm mechanism with the same type of lubricant that was originally used. This is usually automotive grease rather than a spray lubricant.

  • Scrub the screws with a toothbrush to make sure there is no dust or grease embedded in the threads and reassemble the arm mechanism. Replace the crank handle on the shaft.

Tips & Warnings

  • Pry up the casement casing carefully with a putty knife if you can’t immediately see the screws that allow you to access the inner workings of the crank mechanism.
  • Avoid using acidic or abrasive cleaners during routine cleaning because they may strip out the lubricants.

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References

  • Photo Credit Hemera Technologies/AbleStock.com/Getty Images
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