How to Easily Fix a Broken Window Crank in 9 Steps

If your casement window won’t open or close properly, the culprit is likely a broken window crank. Fortunately, fixing a window crank is a straightforward process that can be completed in just a few steps. In this comprehensive guide, we’ll walk you through the process of removing and replacing a broken window crank, ensuring your windows operate smoothly once again.

Gather the Necessary Tools and Materials

Before you begin, make sure you have the following tools and materials on hand:

Screwdriver (flathead and Phillips head)
Pliers
Hammer
Drill (optional)
Replacement window crank (ensure it matches your existing crank)

Prepare the Window

Start by opening the window until the crank arm guide bushing aligns with the notch in the guide track. Use locking pliers on the crank handle and push out on the window to help it open. Press down on the arm to free the bushing from the track, and then push out the window until the bushing clears the track.

Remove the Trim and Crank

Next, remove the trim screws and lift the casement cover off the window jamb. Back out all crank mounting screws and lift off the crank. If the trim screws are rusted or bent, replace them with new ones.

Inspect the Old Crank

Take a close look at the old crank for any signs of damage. Worn or missing splines on the crank stud, stripped or broken gears, and worn-out crank arms indicate that the entire crank operator needs to be replaced.

Find a Replacement Crank

Compare the new operator with the old to ensure they match. If you’re unsure, you can mail your old crank to replacement hardware specialists who can provide you with an exact match.

Install the New Crank

Line up the new crank with the old screw holes. If the holes are stripped, stick a toothpick or two in them as filler and drive the screws. Then, reattach the crank arm and casement cover.

Secure the Window

Close and lock the window until the new crank is installed. Once the new crank is in place, open and close the window to ensure it operates smoothly.

Troubleshoot Common Issues

If the window crank handle spins without engaging the window, or it can’t pull the sash in far enough to lock, the gears are likely stripped. In this case, replace the entire crank mechanism.

Maintain Your Window Crank

To keep your window crank in good condition, regularly clean and lubricate the moving parts. Use a silicone-based lubricant or a dry graphite lubricant to prevent rust and ensure smooth operation.

Conclusion

Fixing a broken window crank is a straightforward task that can save you money and time compared to replacing the entire window. By following these nine steps and using the right tools and materials, you can have your casement window operating like new in no time.