Replacing a Crank on Your Casement Window: A Comprehensive Guide

Casement windows are a popular choice for homeowners due to their stylish appearance and ease of use. However, like any other window, they may require maintenance from time to time. One common issue that may arise is the need to replace the crank on your casement window. In this blog post, we will provide a comprehensive guide on how to do just that, ensuring that your window is back in perfect working order in no time.

Understanding the Casement Window Crank

Before diving into the process of replacing the crank, it's essential to understand its purpose and how it functions. The crank is a vital component of a casement window, as it allows you to open and close the window with ease. It consists of a handle and a mechanism, which work together to move the window sash. Over time, the crank may become damaged or worn, resulting in difficulty operating the window or even preventing it from opening altogether.

Identifying the Issue

The first step in replacing a crank on a casement window is to identify the problem. This may involve closely inspecting the crank for any visible damage or signs of wear. Common issues include stripped gears, broken handles, and bent or damaged mechanisms. If you're unsure about the source of the problem, it may be best to consult a professional for guidance.

Gathering the Necessary Tools and Materials

Before you begin the replacement process, it's essential to gather all of the necessary tools and materials. You will need:

A new casement window crank (ensure that it is compatible with your specific window model)

A screwdriver (both flathead and Phillips may be required)

A utility knife

A small pry bar or putty knife

A pair of pliers

A drill (optional)

Safety goggles

Removing the Old Crank

Once you have your tools and materials ready, you can begin the process of removing the old crank. Start by opening the window as far as possible, ensuring that you have ample space to work. Next, use the utility knife to carefully remove any paint or caulk that may be sealing the crank cover. Once the cover is free, use the screwdriver to remove any screws holding it in place, and then gently pry it off with the pry bar or putty knife.

With the cover removed, you will have access to the crank mechanism. Use the appropriate screwdriver to remove the screws securing the crank to the window frame. Once all screws are removed, carefully pull the crank away from the window, taking care not to damage the surrounding materials.

Installing the New Crank

Now that the old crank has been removed, you can begin installing the new one. Start by aligning the new crank mechanism with the mounting holes on the window frame. It's essential to ensure that the gears of the crank align with those of the window sash. Once everything is in place, use the screwdriver to secure the new crank to the frame with the provided screws.

With the crank mechanism installed, you can now attach the new handle. This typically involves sliding the handle onto the crank spindle and securing it with a set screw. Ensure that the handle is properly aligned and tightened before testing the window's operation.

Testing the Window

With the new crank installed, it's essential to test the window's operation to ensure that everything is functioning correctly. Gently open and close the window several times, checking for any signs of resistance or difficulty. If the window operates smoothly and without issue, you can proceed to reinstall the crank cover.

Reinstalling the Crank Cover

The final step in replacing a crank on a casement window is to reinstall the crank cover. Align the cover with the mounting holes on the window frame and secure it with the previously removed screws. If necessary, use a utility knife to trim any excess paint or caulk for a clean, finished appearance.

With the cover in place, your casement window should now be fully operational and looking as good as new. Regular maintenance and prompt attention to any issues will help to ensure the longevity and performance of your casement windows. And remember, if you ever encounter a problem that you're unsure how to handle, don't hesitate to consult a professional for assistance.

Casement Window


Casement windows are the most common style of window. They feature hinged panels that swing open and closed. Casement windows are available in single panels or multiple panels. The direction a door swings, either to the right or the left, is called the handing. In addition to handing, window are identified as either inswing or outswing depending on whether they open into the house or towards the outside.


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