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TROUBLE SHOOTING GUIDE

Maintenance

Periodically use a non-greasy lubricant on the latchbolt face, cam, internal & external handle.

MATLOCK INDUSTRIAL PRODUCTS  

Security House, Wigston, Leicester, England

Box contents

Please ensure you have received  all the following parts:

1.

Lock Case (outside body).

2.

Back Plate (inside body).

3.

Neoprene Seals.

x 2.

4.

Spindles.

(only 1 of 3 is used, dependent on the

thickness of your door. For model DLK504, cut the
attached spindle to the required length).

5.

Latch.

(60mm standard).

6.

Strike Plate.

7.

Wood Screws.

x 4. (use with latch and strike plate).

8.

Latch Support Post.

9.

Tweezers.

(for changing the code).

10.

Fixing Bolts.

3 supplied (one spare).

11.

Code Tumblers.

(spare x 2 RED & 2 BLUE).

12.

Code Card.

13.

Keys x 2. 

(model DLK504 only)

14.

Drilling Templates.

Matlock continually strives to improve its products,
specifications may change without prior notice

How to change your code number

Your lock has been pre-programmed with a five-digit access code. This
section tells you how this code may be changed.
You will also have been supplied with spare tumblers; these may be used to
reduce the code to four digits or to increase it to six or seven digits.
Also supplied is a pair of tweezers for removing the tumblers. Make sure these
are ready to hand.

1. Remove the lock from the door.

2. Remove the 4 R

RE

ED

D retaining screws from the back of the ‘Outside Lock

Body’. Take E

EX

XTTR

RA

A care to keep the lock body on a flat surface, when you are

removing the plate, because there are a lot of small components inside.

3. You will now see that there are 5 R

RE

ED

D coloured code tumblers and 8 B

BLLU

UE

E

coloured non-code tumblers plus 1 C

CLLE

EA

AR

R tumbler (‘C’ button).

4. To change your code, push the ‘C

C’ button down and hold it. You can then

easily remove one or more of your code and non-code tumblers, using the
tweezers provided or needlenose pliers. Your code will always start with
the ‘C’ button (this cancels any wrong entries) plus 3 to 7 buttons of your
choice, both numbers and letters. YYo

ou

u  ssh

ho

ou

ulld

d  N

NE

EV

VE

ER

R  rre

em

mo

ovve

e  tth

he

e  ‘‘C

C’’

ttu

um

mb

blle

err..

5. Please note the different shapes of tumbler, before re-inserting them into

the lock body. Firstly, there is a difference in shape between the code and
non-code tumblers, and Secondly, when refitting the tumblers into the
lock body, they must be fitted facing the right way (See Fig. 8).

6. With the spare tumblers you can change your code to ‘C

C’ + anything from

3 to 7 digits. After you have refitted the tumblers and made a note of the
new code, make sure you replace the metal plate with the 4 screws.

x 2

RED Code tumblers

BLUE Non-code tumblers

Fig. 8

Problems

Cause

Solution

The latch cannot be 

The lock has been fitted to

All locks were set to suit right handed doors.  So 

withdrawn when entering the

a left handed hung door.

the lock needs to be removed from the door and 

code.

reversed.  Refer to instructions.

Both inside and outside 

The spindle is in position 

Remove the lock from the door, and re-position the

knobs retract when turned 

at the wrong angle.

spindle as shown in the instructions.

towards the door frame.

The knob will not turn after 

One or more of the code 

Consult ‘How to change your code number’ 

entering a new code.

tumblers are the wrong 

instruction and check that the red tumblers are all 

way around.

facing with the square notches outwards.

The latchbolt does not move 

The lock is not installed 

Check (A) the lock is square on the door and 

smoothly in and out.

correctly.

positioned accurately over the latch. (B) That the 
latch is positioned horizontally and parallel to door
surfaces. (C) The spindle may be trapped between 
the front and backplate if the spindle is too long.

The outside knob turns after 

The spindle is too short for

If the spindle is too short then it will not engage 

entering a correct code but 

the door thickness.

with both the outside knob and the inside handle 

does not retract latch.

at the same time, or it may slip out of one side after
same use.

Digital Door Lock

ORDER CODE  MTL-949-5040K

MODEL  DLK504

INSTRUCTIONS FOR USE &
GENERAL INFORMATION

Special notes

• Before commencing installation, check that all the parts are working correctly. 
• Press the code according to the Code Card and then the knob should turn and return 

easily under spring pressure. If you intend to change the code, you should do it BEFORE 
installing the lock. See the code change instructions.

• Check that the latchbolt moves freely by pressing at the end and also by turning the flat spindle 

in the latch cam.

MTL-949-5040K_Intructions.qxd  07/05/2009  07:40  Page 1

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