Masterlock BCO0103 Guide

Instructions for installation of knob or lever locksets

Backset is the distance from the door edge to the center of the hole on the door face. Master Lock door locks are supplied

with an adjustable latch which can fit 2-3/8” (60mm) or 2-3/4” (70mm) backset.

Follow steps below to change backset.

To convert to 2-3/4" backset

Backset

a. This latch is for 2-3/8" (60mm) backset.

b.Keep spindle cam in correct position as illustrated. Pull spindle cam all the way to the right.

c. Your latch is now set for 2-3/4" (70mm) backset.To reset 2-3/8" backset,push spindle all the way back to the left.

Mark door with template Drill holes

Measure one half of door thickness from doorstop

and mark for the vertical centerline of strike. Drill

1" hole, 1/2" deep at the intersection of the

horizontal and vertical centerlines.

Close door to mark horizontal

centerline of strike.

Insert latch in

hole, mark

outline of face

plate and

chisel 11/64"

(4mm) deep.

Insert latch and tighten screws.

Select 2-3/8" or 2-3/4" (60mm or 70mm)

backset as desired and mark center of hole

on door face.

Drill 2-1/8" (54mm) hole on door face from both sides

to avoid wood splitting. Drill 1" (25.4mm) hole for latch.

Install latch

Attach the latch face that matches the mortise in the edge of your door

Fin

Floating Sleeve

Round Face Plate

Locate floating sleeve and round

face plate and proceed.

To change latch faces:

1. Use a flat screwdriver to separate the face plate.

2. Snap selected latch face onto backplate.

For drive in installation:

Push latchbolt to the end and hold. Align the round face

plate opening with the fin on the latch. Push to the end

and rotate the round face plate counter-clockwise. After

assembly, release latchbolt to fully extend. Move the

floating sleeve toward the round face plate until the

edge fits into the ring opening of the round face plate.

Back Plate

Face Plate

Install outside knob (or lever)

Insert spindle through latch. Press flush against door. (NOTE: Key hole must be in down position).

Install inside knob (or lever)

Install inside knob (or lever) and tighten screws until lock is firm.

a. Match screw holes on strike with vertical centerlines on jamb. Mark outline of strike plate and chisel out until strike

is flush with jamb. (Approx. 1/8")

b.Install strike and tighten screws.

Install strike

1-3/4"

45mm 1-9/16"

40mm 1-3/8"

35mm

Make 1" Hole at Center of Door Edge

TEMPLATE

Fold on Dotted Line and Fit on Door Edge

For Backset 2-3/8"

For Backset 2-3/4"

Check out the collection of home doors & windows we offer.

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