How to Repair a Cylinder Lock Deadbolt

Lead Image
  • 1 hours
  • Beginner
  • 30-40
What You'll Need
Can of air
Thin pry bar
Small wire brush (soft)
Paper towel
Silicone lubricant
Small paintbrush
Touch up paint

A cylinder lock gives extra security for your home and family. Given the fact that such a deadbolt is generally placed on the door to the main entrance of the house, it is important to ensure that it is always working in good condition. There are two types of deadbolts that can be installed. The single-cylinder is opened with a key from the outside and closed with a thumb lock on the inside, while a double cylinder type can be secured by a key on the inside and outside.

The level of security with a double cylinder lock is high but you should always have an extra key inside in case you need to make an emergency exit. The locks are constructed of heavy steel and should last for a long time but there will come a time that it will get damaged from constant use.

Step 1 - Check the Cylinder Lock

Key your lock from the inside and outside and see if there is any resistance. If it is caused by any loose screws, you can easily repair the damage by tightening them with the screwdriver.

Step 2 - Remove the Deadbolt

If the cause of the malfunction does not lie with any loose screws, remove the deadbolt by turning it into the unlocked position and removing the screws that are on the inside first. To expose the lock mechanism, take out the cylinder from both sides. The bolt should come free if you remove this mechanism. If there is paint around the deadbolt, you will have to use the pry bar to remove the cylinders gently.

Step 3 - Remove Dirt and Dust

Remove any debris by blowing the can of air outward from the exposed door hole. If there is hard to remove dirt and grime, use the soft-bristled wire brush. Make sure that you use the can of air from a distance with short bursts only. Applying a constant spray of air will create condensation. Spray the locking mechanism and cylinders as well as any lingering dust on the whole set. Put all the parts in a paper towel to allow moisture to dry out completely.

Step 4 - Lubricat the Deadbolt Mechanism

Cleaning the whole set also takes away any lubricant that may have been applied previously. You must reapply lubrication in order to make sure that all the moving parts will move smoothly. A silicon lubricant is better than a graphic lubricant since there is no black particles that may get deposited on your door. Take care not to over lubricate though. If you damage any door paint around the lock, you can retouch it using the touch-up paint.

Step 5 - Reinstall the Cylinder Lock Deadbolt

Put the cylinders and locking mechanism back, making sure that all the parts are on their right places and that they are well aligned. If you are going to work with care though, you do not have to make any adjustments to align them. Put back the screws but do not tighten them all the way yet. Close the door first and lock it to engage the bolts. Only then should you tighten the screws fully to ensure a perfect fit.