How to Replace Garage Door Extension Spring Cable | 15 Steps Guide


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Learning how to replace garage door extension spring cable without falling into an ambulance is easier than you think. A garage door extension spring cable is the tensioning device for a section of the door that has been lowered to the ground. It is made up of two parts: an inner coil and an outer sheath, which are connected together by a coil nut. The cable coils over spools in both ends as it extends from one end to the other, which allows you to adjust how tight or lose your garage door springs should be. If you need help replacing your garage door extension spring cable, please read on how to replace garage door extension.

A great deal is possible for a parking garage door to fail, but most are easy to fix. However, the problems associated with garage door extension springs are more serious.

Tools Needed

  • Adjustable wrench
  • Clamps
  • Cordless power drill
  • Hammer
  • Leather gloves
  • Locking pliers
  • Rags
  • Safety glasses
  • Wrench/ratchet wrench set
  • Slotted wrenches
  • Socket wrench set

How to Replace Garage Door Extension Spring Cable

How to Replace Garage Door Extension Spring Cable

Learn More: How To Fix Garage Door Cable That Came Off

Step 1: Close the door.

  • Place a safety clip or C-clip on the horizontal track directly above one of the rollers.
  • This will prevent the door from lifting and breaking when a new spring is installed during the garage door repair process.
  • Also, disconnect any wires and plugs connected to the types of garage door handle before starting the garage door spring repair.

Step 2: Disconnect the undamaged spring.

  • Insert the sine plug into the bottom hole of the garage door spring sine cone.
  • Hold the rod while loosening the two screws.
  • Keep it tight; the spring will produce a strong torque when the screws are loosened.

Step 3 – Using the two winding rods

  • Insert the second winding rod into the 9 o’clock hole.
  • Remove the lower crosshead and loosen the spring a quarter turn at a time so that the winding rod goes up with each turn.

Step 4: Remove the spring from the center bracket.

  • Remove the two bolts and nuts holding the spring cone to the center support.
  • Then slide the spring into the end bracket.

If your vehicle is stuck

  • If a spring or cable breaks while parking, the garage door will not open and will be stuck.
  • An overnight or weekend emergency garage service can cost $400.
  • However, if you can get the car out of the garage, you can defer the normal cost of repairs for up to a week.
  • If you want to do the repairs yourself, get a few estimates over the phone first, as prices vary widely from one repair company to another.
  • Most garage doors are heavy (200-300 kg). So call three strong friends to help you lift and hold the door while you secure it in the fully raised position with locking pliers.
  • Then park the vehicle again and ask your friends to help you lower the door.

Step 5 – Installing the torque tube.

  • Attach clamps or C-clamps to the center console to secure the torque tube to the center console.
  • Finally, loosen the shaft bolts of the left-hand and right-hand hoisting ropes and unhook the hoisting ropes.

Step 6: Remove the old spring.

  • From the left side of the door, slide the torque tube to the right side and remove the cable drums.
  • Next, pull the old spring out of the tube location.

Step 7: Retrieve the replacement spring.

  • Take out the tape measure and press the hook between the two coils of the spring and record the length of 20 coils.
  • Then measure 40 coils. Convert the measurements to decimals (e.g., 4-1/2″ to 4-1/2″ or 4-1/8″ to 4-1/2″).
  • To get the spring wire diameter, divide these two values by 20 to 40.
  • Here is an example: 4.50 divided by 20 = 0.225″ thread diameter; 9.0 divided by 40 = 0.225″ thread diameter.
  • If the two results match, the measurement is correct.

Determine the “pointer” of the spring.

  • Look at the wind direction or “pointer” at the end of each spring.
  • If the end of the strand points to the right, it is a true wind.
  • If the endpoints to the left, it is left-wing.
  • A door with two springs always has a left and a right spring.

Measure the inside diameter and length

  • Measure the inside diameter of the broken spring as shown in the figure.
  • Loosen the screw of the broken spring and slide the broken part over the fixed part.
  • Measure the overall length of the spring (excluding the cone).
  • Most do-it-yourself stores don’t carry all the parts needed to replace a garage door spring, and most garage door repair companies won’t sell them to you.
  • Therefore, he may have to reorder the spare parts over the Internet and wait for them to be delivered to him.
  • In the first place, inspect the wiring and fasteners for damage.
  • If you find that the cable wires are broken or the lower clips are rusted, replace them before they break.
  • Basic clamps cost about $15 a set.
  • Premium safety cables (advertised as “7×19”) have a much longer life than Economy cables and only cost about $4 more.
  • Therefore, it makes sense to buy the best cables for about $12 per set.
  • These Standard torsion springs (about $40 each) are rated for 7,000 to 10,000 open-close cycles.
  • However, for about $65, you can buy a spring that will last twice as long (25,000 cycles).
  • If you have a double spring and one break, the other spring will soon break as well. So replace them at the same time.
  • Selecting the right type of dock for your door depends on providing your supplier with a few details.

Step 8 – Inserting the left spring.

  • Insert the new replacement torsion spring into the torsion tube with the mounting cone towards the center console.
  • Next, reassemble the cable drum and garage door cables.
  • Reinstall the torsion bar back into the left side bracket.

Step 9: Install the new center bearings.

  • Slide the torsion bar to the left and slide it over the center bearing.
  • Install the right spring and insert the bearing into the fixed cone.
  • Place the two fixed cones on the center bearing.

Step 10: Reassemble the base bracket, stationary pulleys, and hoist cable.

  • Hook the loop of the hoist cable onto the pin on the new lower support arm.
  • Insert the new pulley.
  • Then install the new lower support arm and wire rope.

Step 11 – Wire Rope Attachment

  • Install the elevator or garage door cable directly between the roller and the door frame.
  • Insert the upper end of the lift cable into the roller recess.

Step 12 – Tension the pulley

  • Place a latch on the torque tube to lock it while tightening the drum.
  • Rotate the drum and thread the cable into the sheave groove.
  • Tighten the cable to the maximum before tightening the locking screw.
  • Leave the clip in place and repeat the tightening process on the other side.
  • The tension should be the same on both sides.
  • Otherwise, the door will open unevenly.

Step 13: Rotate the garage door tension spring.

  • Insert the winding bar into the cone and wind it toward the ceiling.
  • Rotate the spring a quarter turn at a time, wrapping around the coiling rod.
  • Observe the total number of revolutions as indicated by the spring supplier’s recommendations.
  • If you do not recommend it, take 30 turns for a 7-inch door and 36 turns for an 8-inch door.

Step 14 – Tension the spring

  • Once the spring is fully wound, touch the winding bar and stretch the spring approximately 1/4 inch on center before tightening the set screw.
  • Turn the set screws until they contact the torque tube.
  • Then tighten the set screws one-half to three-quarters of a turn.
  • If the set screws are over tightened, the torque tube may be punctured or deformed.

Step 15: Lubricate the spring.

  • Insert a strip of cardboard or a small paper bag between the dock and the wall.
  • Then slide the spring into the garage door lubricant.
  • Wipe off excess solution.

Finally, test the garage door spring.

  • Remove the clamps and clips from the torsion tube and guides and lift the door by hand about three feet.
  • With the door springs correctly adjusted, when released, the door should remain in position.
  • If the door lowers when released, add a quarter turn to each spring.
  • Repeat the process if necessary.
  • If the door continues to move open automatically, Release the spring tension by a quarter turn until the door stops.
  • The hole is then reactivated.

What is Garage Door Handles for?

Garage door extension springs provide lifting force to heavy doors and are under a lot of stress; if you don’t pay attention to them, you could hurt yourself.

How to replace garage door extension spring cable by yourself?

YouTube video

If you use the right tools and follow our instructions, you can repair your entire torsion spring system in a matter of hours without having to go to the emergency room.

Depending on where you live, replacing your garage door torsion springs could save you $200 or more.

Even before you spend long hours getting your garage door serviced, it’s a very good idea to have a professional give you an estimate on garage door spring replacements.

To begin your garage door spring replacement project, take the approximate measurements of the springs (length and diameter).

Second, you measure the width and height of the door. Make sure the estimates include the cost of travel, parts, and labor.

Then ask for a price based on a 7 x 19 lifting cable and a double-length spring.

Frequently Asked Questions

Is it possible to remove the door springs of my garage door myself?

While you can replace any garage door spring yourself, it is best to leave torsion spring replacement to the professionals if you are inexperienced in DIY.

How long does it take to replace garage door springs?

It shouldn’t take a good technician more than 30 minutes to replace a garage door spring and adjust the correct tension so that the door opens easily and stays in any position.

Can I open a garage door with a broken spring?

The tension springs located along the door track on both sides of the door help balance the door’s weight when the door is raised or lowered.

The torsion springs at the top of the door do the heavy lifting. Therefore, it is not recommended to open the door in this manner.

Is it dangerous to replace garage door springs?

One of the most major housekeeping tasks you should never attempt in your home is replacing the garage door springs.

Seeking to replace the entire mechanism yourself can be very dangerous due to the high tension of the springs.

Should I replace both garage door springs?

When the door opens, the springs are released and give off energy that helps lift the door.

When replacing the springs, it is recommended that both springs be replaced and adjusted simultaneously, as the old, undamaged springs have lost some of their tension over the years of use.

How the garage door is springs wound?

The spring hose on the right side is wound clockwise. Therefore, the cable end is on the right.

On the other hand, the spring hose on the left side coils counterclockwise, and the cable end is on the left.

The direction of winding is difficult to determine from the front.

How many turns is a 7 m long garage door spring?

The rule of thumb for springs is that a quarter turn equals one full turn and that the spring should be tightened one full turn for each additional meter of door height (e.g., 7-1/2 meters for a door = 7 turns + 2 (30 quarter turns).

How long should the garage door cable be?

For a standard garage door, the length of the cable should be the height of the door plus 18 inches.

When measuring the old cable, measure the entire length, including the loop, coil, radius, and stop.

How much does it cost to replace garage door springs and cables?

The cost to replace the springs and cables ranges from $175 to $450. Experts only charge $75 to $200 for the cables and usually less for the springs.

You may have to replace the rollers or drums, but this does not happen often.

How easy is it to replace garage door springs?

In general, extension springs are considered easier to replace. You can completely disassemble and replace a door spring without having to deal with dangerous tension.

When the door opens, the spring has lost most of its tension and should be safe.

When do garage door cables need to be replaced?

If you notice that the cables are worn, they need to be replaced.

When opening or closing, the door may move sideways or come off the track. If a damaged cable derails the door, other components may also be damaged.

How do I adjust the height of my garage door?

Your garage door may be small enough for a golf cart or large enough for a tractor, depending on your home or neighborhood.

In most homes, standard single-car garage doors are 2 to 3 feet wide and 2 to 3 feet high.

Which is better, torsion spring or extension spring?

Torsion springs are more expensive, but they typically last 15,000 to 20,000 cycles, while extension springs last 10,000 cycles.

You can also do the calculations for torsion springs. It gets better and better from here.

Bottom Line

Replacing garage door spring cables can be a bit of a hassle for anyone. However, it’s important to leave the job to the professionals if you don’t know anything about it. If you think you can do it, follow the steps outlined in this article, and you will succeed.

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