
Full Answer
How to clean and lubricate a casement window crank?
- Poor lubrication in the crank mechanism
- Debris in the track along which the control arm slides
- Loose screws
How do I choose the best casement replacement windows?
What to Look For When Choosing New Casement Windows?
- Buy only Energy Star windows. If you buy casement windows that are Energy Star labelled, you can be sure that they are energy-efficient and comply with the highest industry standards.
- Double or triple glazing? ...
- Analyze other window styles and options. ...
- Correct measurements and installations. ...
How to fix a stuck casement window?
- Have a look at another window (on the ground floor) that has the same mechanism, to familiarise yourself with how the lock works and where all the parts are fitted.
- You may need to remove the window handle if it gives you more room.
- Make sure you are pulling in the right direction (in the direction that the shootbolts move to open).
Are casement windows ideal replacement windows?
Sliding and casement windows are the best options when choosing replacement windows. However, they are different and have unique benefits. Their differences include functionality, size, and accessibility. Here are a few critical things about casement and sliding windows. This is one of the most popular styles for modern homes.

Why are casement windows bad?
Casement windows can develop problems due to wear and tear over the years. Renewal by Andersen® of Portland is always ready to work with you if you need a window replacement, but before that, you can try a few things to remedy the problem yourself. Read on for some tips.
What does it mean when a casement window won't open?
Stripped Window Crank. If your casement windows won’t open or close even when the window crank is turning, this typically means the gears have been stripped. Depending on the type of mechanism your casement window has, you may be able to remove the handle, unscrew the outer casing and inspect the operator assembly.
Can you clean casement windows?
Cleaning the window exterior can be difficult, or in the case of upper-story windows, even dangerous. Of course, you can always hire professional window cleaners to make them shine once again.
What is a casement window?
Casement windows are usually made of wood or metal. The sash is attached to the frame with a hinge. A cranking mechanism called an operator attaches, via an arm, to a channel on the underside of the sash. Once the sash is closed, a latch grabs it and tightens it against the frame.
How to clean a crankshaft?
Clean the gears with solvent and a toothbrush, then wipe with a rag. Slowly turn the crank to see that the gears mesh. If you see broken parts, replace the operator. Otherwise, apply grease, replace the cover, and test.
How does a casement window crank work?
The casement window crank works by way of an arm moving the window in and out. Open the window to remove the arm. It should be a fairly simple procedure. Depending on how the crank is made, it may be necessary to remove some screws holding it in place.
What is a casement window?
A casement window is usually found as part of a bay window or is nestled over a kitchen sink. The crank uses some sort of ratcheting or friction mechanism to allow the window to remain open when desired. Sometimes you have problems with the crank sticking, making it difficult or impossible to open the window properly.
What is a casement window?
A casement window is one with a hinged sash that swings in or out like a door. A casement window is usually made of metal or wood. The frame is fixed to the sash by a single or double hinge. There usually is a cranking mechanism called an “operator” that is connected, via an arm to a channel on the frame’s underside.
Where is the cam handle on a casement window?
The windows are open or closed with a crank or cam handle which is usually located at the bottom of the casement window. Just like everything mechanical, sometimes they do break down.
How to move hinge channel?
You can move the channel at the top or the bottom of the window, depending on where the sash is dragging (but don't move both channels). Start by taking out the sash. If the hinge arm is screwed to the sash, see 'Replacing a fogged sash' below. Mark the hinge channel location on the frame, then unscrew the channel.
What does it mean when a handle spins and the window remains locked?
If a handle spins and the window remains locked, it can only mean that the splines either in the handle or on the operator shaft have been completely stripped. Getting a replacement crank that is adjustable to fit a variety of spindles from your local hardware store will do the trick.
How long does it take to get a flat side on a folding window?
Remove the handle and file the shaft so the setscrew can lock onto the shaft. The metal is tough; it’ll take about 15 minutes to get a flat side.
Where are the hinge arms located on a window?
Remove the sash from the window. The hinge arms are located near a corner or in the middle of the window frame.
Why do windows stick shut?
Along with doors, windows are the major source of heat loss in most homes. They also may stick shut when they're painted or swell shut from humidity. Inside, shades and Venetian blinds may not work right; glass gets broken, and screens get torn.
What is a window crank?
Window cranks, also known as casement operators, are used to open and close some casement-style windows. There is a spline beneath the handle that wears down over time, causing the handle to spin when turned. The gears will also wear out over time, causing the handle to slip. In order to fix the problem, you do not have to replace the entire window.
How to replace a crank handle on a spline?
1. Remove the attachment screw on the base of the handle using a screwdriver. Pull the handle off the crank stud and inspect the spline beneath the handle and the teeth inside the handle. Simply replace the handle if the teeth are worn. Continue to replace the entire crank if the splines are missing or worn.

Remove The Arm
Remove The Assembly
- Now you can remove the assembly that is attached to your window. Start with any mounting screws that you see. Some may be hidden and you might have to remove a cover to access them. In the event that your mechanism is attached by nails, you will need to carefully pry the assembly away from the window.
Cleaning The Assembly
- This assembly is what does the work in opening and closing your window. If it has become dirty it will stick. Use a small wire brush and some cleaning solvent and clean away any dirt you see. Move the mechanism back and forth occasionally while cleaning to dislodge any grit which may be lodged inside. A toothpick might be handy for reaching areas that are deeper, but be careful n…
Clean The Frame
- On the bottom of the frame or the stop is a track on which the mechanism glides. This too may have become caked with dirt or debris. Use your wire brush and solvent and clean this off as well. Apply some grease to this area after it is clean
Reinstall The Parts
- Following the reverse order of the way you took off the parts, replace all the parts, screwing in all screws tightly. Check the operation of the crank. It should now move the window open smoothly. Wipe away any grease or oil that might've spilled.