How to reinstall MPLS thumbturn and cylinder

Follow our helpful process here to make your next project a success and to ensure your door is properly secured.


Time Required: Icon_Time3_30m_60m_85gray-1 Difficulty: Icon_DiffLevel2_85gray-1


Tools Required

  1. Safety glasses Icon_SafetyGlasses_85gray-1
  2. Phillips head screwdriver Icon_ScrewDriver_85gray-1
  3. Ring wrench (or paper clip)
  4. Allen wrench Icon_AllenWrenchSet_85gray-2-1

Materials Required

  1. New thumbturn
  2. New cylinder


Step 1) Remove cylinder screw


Use the Phillips head screwdriver to remove the cylinder screw on the side of the locking mechanism.


Step 2) Remove thumbturn


Using the allen wrench, loosen the set screw and pull the thumbturn from the cylinder.


Step 3) Cylinder alignment


Using the ring wrench (or paper clip) insert into the cylinder lock and pull downward to release the spring tension. Press the cylinder through the back side of the mechanism.


Step 4) Cylinder removal


Pull the old cylinder out of the locking mechanism.


Step 5) New cylinder install


Align the drive tab with the rest of the cylinder assembly and then slide the new cylinder into it's housing.


Now is the time to reinstall the cylinder screw.

Step 6) Replacement thumbturn install


Place the new thumbturn on to the cylinder rod and use an allen wrench to tighten the set screw. The installation is now complete.