How to Fix Casement Window Cranks
Fresh air and cooling breezes drifting through open windows is a pleasurable experience so having a casement window that opens is important. If your casement window won’t open and the problem is the crank, repairing it is moderately quick and easy.
- Lubricate the crank. Sometimes all the gears need is a dab of oil. If any parts of the metal crank are broken and it is falling apart, the crank will need to be completely replaced.
- Open the window partially so the vinyl knob on the extension arm can be pulled off. This might require removing a C-clip, unscrewing the arm gear from hinged fittings or sliding the arm across to an access slot, depending on the make and model of your casement window. There may also be a wooden stop that will need to be removed.
- Inspect the crank and crank handle. Look for any obstructions and note that the gears mesh cleanly. Remove any rust with a wire brush. Use solvent and a toothbrush if the gears are still dirty.
- Lubricate the mechanism using a multipurpose lubricant.
- Thoroughly clean out the window track, the window frame and beneath the sash. Some manuals recommend lubricating the bottom sash of the window. If you choose to do so, wear gloves when applying the lubricant to avoid splinters and wipe away any excess lubricant.
- Reassemble the crank mechanism, reattaching to the window. Lubricate the handle and hinges and open and close the window several times to spread the lubricant throughout the gears.