How to Replace a Lock Cylinder

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If you have lost your keys and need to change the locks on your home, consider replacing just the lock cylinder instead of the entire assembly. The cylinder is the portion of the lock that contains the keyhole and the combination of pins that unlock the door. Purchase a replacement cylinder that is compatible with the type of lock you have. The exact configuration of the cylinders varies by manufacturer.

Things You'll Need

  • Door key
  • New lock cylinder
  • Wire tool
  • Retainer ring tool
  • Plug follower
  • Unlock the door with the key. With the key still in the hole, insert the end of the wire tool into the hole on the side of the knob. Push down on the tool to release the clip inside the knob. The doorknob and cylinder should now slip off into your hand.

  • Remove the key and push on the keyhole to dislodge the cylinder from the knob. Remove the retainer ring by prying it off of the cylinder with the retainer ring tool.

  • Insert the key in the lock again. Turn the key to one side. Push on the keyhole with the plug follower until the cylinder plug comes out the other side. Keep the pins and springs from falling out by pressing the follower tight against the plug as you work.

  • Push the new cylinder plug into the lock. Attach the retainer ring and slide the cylinder into the doorknob until the keyhole is flush with the front of the knob. Place the knob back on the door and press down until the retaining clip locks it in place.

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References

  • Photo Credit lock image by timur1970 from Fotolia.com
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