background image

Begin replacement of the 
key cylinder by removing 
the Lock Set installation 
screws on the interior 
side of the door handle.

Remove the exterior face 

of the lock set. 

Remove the screw from the 
Z-clip that is covering the 
door cylinder on the exterior 
plate. 

Rotate the thumbturn 
on the interior handle 
assembly to the vertical 
position so that it is 
aligned with the key 
cylinder tail. 

(Note: The 

key cylinder tail in 
the horizontal position 
should align with the horizontal slot in the thumbnail shaft.)

 

Place the door handle in a horizontal position and slide the 
two halves of the lock together.

Remove the Key Cylinder and 
replace it with the new cylinder.

Re-install the Z-Clip over 
the key cylinder.

If the foam gasket has fallen 

down. Place it back onto the 
lock set.

3-Point Lock System  

KEY CYLINDER REPLACEMENT

   REQUIRED TOOLS

1

)

 Remove Screws

2

)

 Remove Exterior Face

3

)

 Remove Z-Clip

7

)

 Align Assembly

4

)

 Remove Cylinder

5

)

 Re-install Z-Clip

6

)

 Check Gasket

Silicone Caulk

Phillips Bit

Screw Gun

8

)

 Re-install Screws

Re-install the two lock set   
installation screws from step one 
and check the operation of the 
lock set. If the door does not lock, 
remove the exterior handle assembly 
and rotate the key cylinder tail 180 
degrees and then reinstall the handle assembly.

Questions or Concerns: For guest assistance contact 

MASTERCRAFT

®

 

by sending an email to: 

MastercraftDoorHelp@MidwestManufacturing.com

For more information, including troubleshooting help 

and videos, please visit:

www.MastercraftDoors.com

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