Remove and replace

• 1). Purchase the correct springs for your door. Most springs are color-coded to let a door supply company know which replacement spring is needed. Measure your garage door and let your parts dealer know which color is at the end of the spring.
  
  
• 2). Lift the garage door to the fully open position with assistance from a helper. While the helper makes sure the door stays up, clamp a vice grip directly underneath the bottom roller in the track on each side of the garage door.
  
  
• 3). Disconnect the three-hole adjusting clip and S-hook that is attached toward the front of the track assembly on the side of the broken spring. Do not remove the unbroken spring yet because it will serve as a visual guide for running the cable.
  
  
• 4). Untie the cable from the clip and remove the sheave from the spring. Remove the safety cable that runs through the spring by unbolting it from the rear hanger.
  
  
• 5). Unhook whatever is left of the broken spring from the back hanger.
  
  
• 6). Attach the sheave to one end of the new recoil spring and hook the other end into the rear hangar in the same position as the old one.
  
  
• 7). Thread the cable through the sheave and tie it into the three-hole adjusting clip. Look at the cable routing on the other side for reference, if necessary.
  
  
• 8). Attach the S-hook to the adjusting clip. Pull on the cable to stretch the spring a little bit and insert the S-hook into the track through the adjusting holes provided.
  
  
• 9). Repeat the entire procedure for the other side.
  
  
• 10
  
  With a helper, hold the door and remove the vise grips when completed. Slowly let down the door. You may have to adjust the spring tension, depending on whether the door is closing too fast or opening too quickly. Put the vice grips on the open garage door as before and move the adjusting S-hook forward or backward.