Installing Series 37 Quick-Tilt coil spring window balances is a straightforward repair that restores smooth operation to tilt windows. If your window no longer stays open or feels heavy when lifting, the balance system likely needs replacement.

This step-by-step guide explains how to install Series 37 Quick-Tilt coil spring window balances safely and correctly using basic tools.

What Are Series 37 Quick-Tilt Coil Spring Window Balances?

Series 37 Quick-Tilt balances are coil spring counterbalance systems used in many modern tilt-in windows. They help support the sash weight so the window opens and closes easily.

These balances are typically mounted vertically inside the window frame and connect to the window sash using pivot shoes.

Common signs your balances need replacement:

• Window will not stay open
  
  

• Window slams shut
  
  

• Sash feels heavy when lifting
  
  

• Broken or stretched coil springs
  
  

• Visible damage to the pivot lock shoe (pivot shoe)
  
  

Tools and Materials Needed:

Before installing Series 37 Quick-Tilt balances, gather the following tools:

• Flathead screwdriver
  
  

• Phillips screwdriver
  
  

• Needle-nose pliers
  
  

• Putty knife (optional)
  
  

• Replacement Series 37 Quick-Tilt coil spring balance
  
  

• Safety gloves
  
  

Having everything ready makes the installation faster and safer.

Step 1: Remove the Window Sash

Start by removing the window sash.

1. Unlock the window and raise it about 3–4 inches.
   
   

2. Locate the tilt latches on the top of the sash.
   
   

3. Slide both tilt latches inward.
   
   

4. Carefully tilt the sash toward you.
   
   

5. Lift one side of the sash upward to release it from the pivot shoe.
   
   

Set the sash aside in a safe place.

Step 2: Access the Pivot Shoe

With the sash removed, you can see the pivot shoe inside the window track.

The pivot shoe is the plastic component that connects the coil balance to the window sash pivot bar.

If the pivot shoe is stuck:

• Use a flathead screwdriver to rotate the cam to the unlocked position.
  
  

• Slide the shoe to a comfortable working height.

Step 3: Remove the Old Coil Spring Balance

Next, remove the damaged coil spring.

1. Locate the coil spring housing attached to the window frame.
   
   

2. Remove the mounting screws holding the coil housing in place.
   
   

3. Lift the old balance assembly out of the track.
   
   

Always keep tension on the coil while removing it to avoid sudden release.

Step 4: Install the New Series 37 Quick-Tilt Balance

Now install the replacement balance.

1. Position the Series 37 Quick-Tilt coil balance in the same location as the old one.
   
   

2. Secure the housing with the mounting screws.
   
   

3. Ensure the spring sits straight and aligned in the track.
   
   

Make sure the coil tension is properly seated to support the sash weight.

Step 5: Reinstall the Window Sash

Once the balance is installed, reinstall the sash.

1. Hold the sash at a tilted angle.
   
   

2. Insert one pivot bar into the pivot shoe.
   
   

3. Insert the opposite pivot bar into the other shoe.
   
   

4. Rotate the sash upward until it clicks back into the frame.
   
   

5. Close the tilt latches.
   
   

Test the sash by raising and lowering it several times.

Step 6: Test Window Operation

Proper installation should allow the window to:

• Open smoothly
  
  

• Stay in place when lifted
  
  

• Close without slamming
  
  

• Tilt in and out easily
  
  

If the window still feels heavy, verify that:

• The coil spring is attached correctly
  
  

• Both sides have matching balances
  
  

• The pivot shoes are properly positioned

Safety Tips When Installing Coil Spring Balances

Keep these safety tips in mind:

• Wear gloves to protect your hands from sharp metal edges.
  
  

• Maintain control of the spring to prevent sudden tension release.
  
  

• Replace balances on both sides for consistent support.
  
  

• Always use the correct weight rating for your window sash.
  
  

Frequently Asked Questions (FAQs)

How do I know if I need Series 37 Quick-Tilt balances?

If your tilt window uses a coil spring balance system with pivot shoes, Series 37 is commonly used in residential vinyl windows. Checking the existing balance housing usually confirms the model.

Can I replace only one coil spring?

It is recommended to replace both balances at the same time to ensure even sash support and longer lifespan.

How long does installation take?

Most homeowners can install Series 37 Quick-Tilt balances in 15–30 minutes per window with basic tools.

Final Thoughts

Knowing how to install Series 37 Quick-Tilt coil spring window balances step by step can save time and restore proper window performance. With the right tools and careful handling of the spring tension, the repair is manageable for most homeowners.

If your window still does not operate smoothly after installation, double-check the balance weight rating and pivot shoe alignment. For more information or assistance ordering the correct coil spring balances, Contact Us Today! The WHD Team will be happy to help.