How To Re-key Old Yale Mortise Deadbolt Locks

How do you re-key old Yale mortise deadbolt locks? 

This week we completed a re-key project for a new customer that involved these 75 year old Yale double cylinder mortise deadbolts. Pictured here is the image of one cylinder installed to the outside of the back door. At the left of the image you can see where someone had deliberately drilled the connecting screw to remove the ability to unscrew the screw from outside.

To be able to remove the cylinders from these really old Yale mortise deadbolts, both inside and outside connecting screws require to come out before the cylinders can be removed for re-keying.

Getting the screws out is not difficult, but that's why we are called as opposed to a handyman or carpenter contractor.

Just about any locksmith with some experience will know the method and skill required to easily disassemble any lock that uses these type of blind screws or bolts, without destruction and enabling the ability to reuse the same screws or bolts when putting the locks back together.

 Pictured next is the image of the cylinder on my bench, already removed from the door. You can clearly see the connecting screw hole.

This image displays the reverse side of the Yale mortise deadbolt cylinder. This style of Yale Mortise deadbolt lock was designed using the original rim style of pin tumbler cylinder, originally patented in 1865 by Linus Yale Jr.

Rekeying these types of older Yale cylinders can be a trap for younger players or less experienced technicians and we will explain the method below to help you with disassembly.

My pointer here is aimed at the retainer clip that holds the tail piece and cover to the rear of the cylinder and core. It is necessary to carefully squeeze the ends of the clip together first.

The next image shows me applying pressure to the retainer clip to allow the clip to be withdrawn from the back of the core.

Here you can see the clip beginning to come out of the cover plate that holds the tail piece on. Carefully use an awl to lever the clip from the core.

This image shows the retainer clip, almost fully withdrawn from the tail piece cover assembly. If you're careful enough, you will not damage the tiny clip enabling you to reuse it for reassembly,

Next, we were also required to disassemble an equally as old entrance knobset to extract the cylinder core for re-keying. To be able to remove the core (plug) from the cylinder it is necessary to remove the rear tail piece and cap assembly and retainer circlip, before you can then remove the core (plug) from the cylinder and replace the tumblers.

Here is an image of the tail piece assembly and retainer circlip removed and the cylinder ready for re-keying.

Some technicians may choose to not disassemble the clip and tail piece, preferring to remove and replace the top cap from the bible (top pinning chamber).

We choose to not show the actual re-pinning method and combination of the re-keyed locks, to protect the customers interests.

Benefits Using Locks210/St Louis Locksmiths For Your Re-Keying Projects

• Almost 40 years local, national and international experience
• Qualified, knowledgeable and field-experienced technicians
• Quantity discounts
• High-quality product options
• Quality Assurance
• Family owned and operated local business

Are you concerned how many keys exist to your home?

When you purchase your new home or move into your new rental property, it is common to want to be the only ones to have keys to your place. You can choose to purchase complete new locks and door hardware or simply contact your local locksmith to simply re-key your existing locks at much less cost, while maintaining the existing products and aesthetics. Contact Locks210/St Louis Locksmiths today and experience the difference we are known for.