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41072 - August 2015    ©Water Street Brass - All rights reserved 

Mortise Passage Set Installation Instructions

 

These instructions are for the installation a mortise 

lock privacy set. The hardware will work with either 

door knobs or levers, depending on the lock specified. 

From this point forward, we’ll just refer to levers.   

Prepare the Door

 

1.   If your door has not already been prepared for 

your lock installation, do so by using the templates 

provided for your specific lock model. Be sure to confirm 

the proper backset, function and handing for your door 

prior to any drilling or mortising. 
2.  If your plates are using through bolts, use the 

provided template to mark and drill the door for the 

bolts. If using surface mount screws, you will position 

the plates as installing and mark the screw positions.
3.  Install the mortise lock body in the door using the 

screws provided. Do not install the lock body face plate 

at this time.    

Install the Hardware

4.  Insert the spindle into the lock body and center 

it.  The security notches should be on the exterior side 

of the door and the set screw grooves should be at the 

bottom, facing the floor.  

5.  First position the exterior plate on the door by 

holding the spindle in place and sliding the lever/plate 

assembly into position.  Tighten the set screw in the 

lever to keep the spindle centered. 

 

Next align the interior plate so the spindle engag-

es the lever.  Adjust the plates to sit square with the 

door edges. 
 

Loosely install the through bolts as shown in the 

assembly illustration. Do not tighten these screws yet.
6.   Adjust the spindle position if needed, then firmly 

tighten the interior lever set screw.
7.  Test the function of the levers.  When satisfied that 

they are working properly, firmly tighten the through 

bolting to hold the plates in place.  

NOTE:

   

Do not

 use power tools to tighten these 

screws! Hand tighten the through bolts only.
8.  Complete installation by attaching the mortise 

lock face plate.

Door Jamb

9.  Carefully measure the jamb to determine the exact 

location that the lock bolt will land when the door is 

fully closed.  Mark the location.  Using the strike plate 

as a template, outline the shape and begin to mortise 

the door jamb 1/8” deep to accept the strike and lip.
Finally, measure the dust box and mortise the jamb to 

the proper depth and width.  

1

Security Notch

Set Screw Groove

Straight Spindle - Bottom View

Mortise

Lock Body

Face

Plate

Lock Body

Installation

Screws

Face Plate

Screws

Escutcheon Plate

Spindle

Lever Or Knob

(Attached To Plate)

Strike

Screws

Strike

Plate

Door Jamb

Box

Height

Dust

Box

1/8”

Box

Depth

Box

Width

Face

Width

Lip

Height

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