How to Maintain a Deadlock

What You'll Need
Screw driver
Wafer thin pry bar
Can of air
Small soft brittle wire brush
Silicone lubricant
Paper towel
Touch up paint
Small paint brush

A deadlock is an extra form of protection for you, your family and your valuables. Generally, a deadlock is located on the door at an exterior entrance to the home. There are one cylinder and two cylinder types of deadlocks. A single cylinder is keyed on the exterior side with a thumb lock on the interior side. A double cylinder deadlock is keyed on both the exterior and the interior.  While protection with a double cylinder deadlock from intrusion is quite high, you need to take precaution to always have a key within quick access in case of an emergency where you must exit quickly. These locks are constructed of heavy steel and should last many years. Proper, regular maintenance will insure safety and the longevity of your deadlock.

Step 1 – Check the Lock

Turn the lock from the outside with the key note if you observe any resistance to the lock freely engaging. Do the same thing by using either the interior key or thumb lock from the inside. After cleaning you will be able to tighten any loose screws that may cause the lock to have come loose over time.

Step 2 – Remove the Deadlock

With the deadlock in the unlocked position, remove the screws from the inside first. Remove the cylinder from both sides exposing the lock mechanism. Remove the lock mechanism, the bolt will come free as you remove the lock. If paint has been applied around the lock you may need to use the pry bar to gently remove the cylinders.

Step 3 – Clean the Deadlock

Blowing outward; use your can of air to remove any debris from the exposed hole in the door. If necessary use the soft wire brush to remove any stubborn particles. The can of air should be used at a distance and in short bursts. If you hold the spray too long condensation will occur from the nozzle. Spray the cylinders and mechanism with air to remove dust and debris. If necessary use the small wire brush to remove any excess. Use the can of air to remove any lingering dust. Place the mechanism and cylinders on the paper towel and allow any moisture to completely dry.

Step 4 – Lubricate

You will need to replenish the lubricant removed during the cleaning process. The idea is to give the moving parts a light base on which to move freely. There is no need to over lubricate. It is advisable to use a silicon spray such as WD-40 as opposed to a graphic lubricant that may release black particles onto your door. Use the touch up paint to fix any damaged paint around the lock area of the door.

Step 5 – Reinstall the Deadlock

Replace the lock mechanism and cylinders back into the door, taking care to align all parts. As long as you do this with care the pieces will all align without any adjustment. Tighten the screw approximate 90 percent of the way.  Close the door and lock the deadlock. Once the bolt is engaged you may tighten the screws to 100 percent.