How to replace a garage door cable?

How to replace a garage door cable?


Replacing a garage door cable is a task that may seem daunting at first, but with the right tools and knowledge, it can be accomplished safely and efficiently. In this article, we will guide you through the process of replacing a garage door cable, step by step, ensuring that your garage door operates smoothly and securely.


Before you begin replacing the garage door cable, it is important to gather the necessary tools and materials. Here are the items you will need:

Materials: Replacement garage door cable, winding bars, safety glasses.

Tools: Adjustable wrench, pliers, socket set, ladder, and a helper.

Safety First

Safety should always be a top priority when working with garage doors. Before starting the cable replacement process, make sure to follow these safety precautions:

1. Disconnect the power: Turn off the power to your garage door opener to prevent any accidental activation while you are working.

2. Secure the door: Use a clamp or locking pliers to secure the door in place, preventing it from accidentally opening or closing during the cable replacement.

3. Wear safety glasses: Protect your eyes from any debris or potential hazards that may arise during the process.

Removing the Old Cable

To replace the garage door cable, you will first need to remove the old cable. Follow these steps:

1. Release tension: Using the winding bars, unwind the tension from the torsion springs. This will relieve the tension on the cable, allowing you to safely remove it.

2. Disconnect the cable: Locate the cable drum at the top of the garage door and disconnect the cable from it. You may need to use pliers or a socket set to loosen any nuts or bolts holding the cable in place.

3. Remove the cable: Once the cable is disconnected from the drum, carefully slide it out from the pulley system.

Installing the New Cable

After removing the old cable, it is time to install the new one. Follow these steps:

1. Thread the new cable: Starting from the bottom of the garage door, thread the new cable through the pulley system, making sure it is properly aligned.

2. Reconnect the cable: Attach the new cable to the cable drum at the top of the garage door. Use pliers or a socket set to secure any nuts or bolts.

3. Wind the tension: Using the winding bars, wind the tension back onto the torsion springs. Be cautious and follow the manufacturer’s instructions for the appropriate number of turns.

Testing and Adjusting

Once the new cable is installed, it is important to test and adjust the garage door to ensure proper functionality. Follow these steps:

1. Remove the clamps or locking pliers: Release the door from the clamps or locking pliers, allowing it to move freely.

2. Test the door: Open and close the garage door several times to ensure it operates smoothly and without any issues.

3. Make adjustments if necessary: If the door is not functioning properly, you may need to adjust the tension on the torsion springs or make other minor adjustments. Consult the manufacturer’s instructions or seek professional assistance if needed.


Replacing a garage door cable may seem like a complex task, but with the right tools, materials, and knowledge, it can be done safely and effectively. By following the steps outlined in this article, you can ensure that your garage door operates smoothly and securely.


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