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Mechanical Combination Lock 

 

                                                           

M-LOCKS BV

 

 

Tel: +31 (0)314 376 876 

Vlijtstraat 40  

ver. 1.2  2017 12 11 

Fax: +31 (0)314 376 878 

NL-7005 BN Doetinchem 

www.m-locks.com

 

DATA 

 

 

 Mechanical 

Opening 

manually 

Locking 

manually 

Blocking element 

3 wheels 

Manipulation-proof 

Yes 

 Mounting dimensions 

Standard 

Certification 

VdS 

Klasse 2 

EN 1300 

Class B 

ECB-S, CNPP, A2P 

Class B 

 
 
What if … 
…accidentally the cam got moved before installation? 

 
As long as the code has not been changed with the change key, the lock can be prepared for 
mounting following the steps below: 

1.  Hold the lock so that you look at the cover and the bolt is to the right. 
2.  Turn the cam clockwise minimum 4 complete turns and stop when the cam is lined up as 

shown in figure 1.  

 

Turn cam counterclockwise until lock opens.  The cam should be lined up with the “LOCK 
OPEN” line on the cover (see figure 2).

 

 
 
 

 
 
 
 
 

 
 

 
 

 

figure 2 

figure 1 

Summary of Contents for ML6740

Page 1: ...TERISTICS The ML 6740 is a manipulation proof 3 wheel combination lock with new features making it very easy to mount VdS Kl 2 EN1300 Class B ECB S CNPP IMP DNV The lock has the standard foot print 66...

Page 2: ...t move the cam part with square hole or the bolt During installation the bolt must stay in retracted position and the cam lined up as shown left Only use the delivered 3 mounting screws 3x M6 with US...

Page 3: ...which the lock opened on the CHANGING INDEX Example If the lock opens at 49 4 x LEFT until 49 stops exactly at the Changing Index 1 Carefully insert change key on the inside of the safe door Slightly...

Page 4: ...pening manually Locking manually Blocking element 3 Wheels Mounting dimensions standard Certifications VdS Class 2 EN1300 ECB S CNPP A2P Class B UL Group 2M DNV 158 2 Listed IMP Klasa B What if accide...

Page 5: ...security lock when the safe is open Par example by a with a screws fixed interior cover The lock housing must be protected against destructive attacks from outside with suitable protective materials...

Page 6: ...S 2A spindle groove on 44 Assemble the ring so that the opening symbol is perpendicular above Cut spindle to length so that the spindle end levels with the cam Don t let spindle stick out Twist dial h...

Page 7: ...e correct code has not been dialed to the Changing Index on the dial Take out the key and dial the valid code again Now dial your new code using the CHANGING INDEX f e 10 20 30 see user instructions o...

Page 8: ...ECB S CNPP A2P Class B What if accidentally the cam got moved before installation As long as the code has not been changed with the change key the lock can be prepared for mounting following the step...

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