Can You Fix a Broken Window Crank? A Step-by-Step Guide to Replacement

If your window crank handle spins freely without opening or closing the window, or if it can’t pull the sash in far enough to engage the lock, chances are the gears are stripped and it’s time for a new crank mechanism. Replacing the crank mechanism is a simple task, but finding an exact replacement part may take some time. In this comprehensive guide, we’ll walk you through the process of fixing a broken window crank, from identifying the problem to installing a new crank.

Understanding the Problem

Before diving into the replacement process, it’s essential to inspect the old crank for signs of wear and damage. Look for missing splines on the crank stud, stripped or broken gears, and worn-out crank arms. If the crank is beyond repair, you’ll need to replace the entire crank operator.

One option is to mail your old crank to replacement hardware specialists, who can match it with a new part. However, keep in mind that replacement cranks can be expensive, so it’s important to weigh the cost against the overall condition of the window. If the window is still in good shape, a new crank may be a worthwhile investment.

Preparing for the Replacement

Before you begin the replacement process, gather the necessary tools and materials. You’ll need a flathead screwdriver, a #2 Robertson screwdriver, adjustable pliers, and a new window crank that matches your existing one. It’s crucial to ensure that the new crank is an exact match, as the dimensions of the crank base must fit the window board cutout.

If you’re unsure about the type of crank you need, take a picture of your old crank and email it to a supplier for assistance. Some companies, such as Swisco, specialize in helping homeowners find replacement parts for their windows.

Step-by-Step Replacement Guide

Now that you have the necessary tools and materials, let’s dive into the replacement process. Follow these steps carefully to ensure a successful installation:

1. Use a flathead screwdriver to pop off the plastic crank cover.
2. Use a flathead screwdriver to unhook the arms of the crank from the window.
3. Remove the part of the window frame that covers the crank screws. This may require the use of a small crowbar, wire cutters, and a block to pry up the board.
4. Unscrew the old crank using a #2 Robertson screwdriver.
5. Insert the new crank into the opening and re-fasten the screws, making sure to line up the arm with the stud bracket pin under the sash.
6. Use your thumb and index finger, or a pair of adjustable pliers, to snap the arm onto the stud. You should hear a loud pop, indicating that the arm is securely attached.
7. Place the board back over the crank, using glue or small finishing nails to secure it in place if necessary.
8. Put the faceplate on by snapping it into place, and then attach the handle to the crank.

With these steps complete, your window crank should be fully replaced and ready for use. Test the new crank to ensure smooth operation and a secure lock.

Conclusion

Fixing a broken window crank doesn’t have to be a daunting task. By following this step-by-step guide and taking the necessary precautions, you can successfully replace your old crank with a new one. Remember to take measurements, find an exact replacement part, and work carefully to avoid damaging the window frame. With a little effort and the right tools, you can restore your window’s functionality and save money on costly window replacements.