How do I remove this deadlock??

[Waikikamukau]

my daughter has moved into an apartment and I want to change the locks for her. But the deadlock seems to have some sort of smooth security screws. How on earth can I open up the casing on this lock so I can swap out the barrel?

These are not “one way” screws that I’m familiar with; they are as smooth as a rounded button. I don’t even know how they were fitted!

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[Beardy]

From memory those little buttons are knurled and just tap in for cosmetic reasons. You should be able to pry them out with a little screwdriver to expose the fixings

[Waikikamukau]

Thanks. They’re certainly not popping out easily if they were tapped in, even with some moderate force. Might have to bite the bullet and get a locksmith in. Pity, as I had spare cylinders ready to go.

[Beardy]

Is there anything on the other face or is it smooth ?

[Waikikamukau]

On the external-facing side? Nothing - it’s a smooth face, as I’d expect for a deadlock.

[Beardy]

Righto, I am quite confident that they will pop out as I said previously. I would persist with it even if you damage the lock as a locksmith call-out will be a lot more than a replacement lock if need be
Get a fine blade and tap with a hammer to get is started

[BMKal]

I fitted exactly the same style locks to our front & back doors a while back.

Screenshot 2023-01-23 at 8.39.41 am.png

As Beardy said, the mounting / securing screws are hidden by those little "buttons". They are a smooth, rounded finish on the outside, with a short, knurled hollow shaft behind them which pushes into the lock body. A little bit like the plastic "caps" used to cover mounting screws on light switches / power outlets, but metal and quite a tight fit (you have to tap them in with a hammer). Once in, they are not easy to get out.

[Mobyturns]

Center punch the "buttons", drill an appropriate sized hole to use a screw extractor. Use a spanner or pliers to grip the screw extractor to ease (wiggle) the buttons out.

or you can use a suitable tap (M4 / M5) to cut a thread in the button then use a machine screw as a puller- well a pusher in this instance. Tighten the machine screw to hopefully force the button out.

As stated above they are designed to be a mongrel to get out.

[Waikikamukau]

Thanks, all - I will take another crack at it this weekend ... and bring more tools with me

[Skew ChiDAMN!!]

Center punch the "buttons", drill an appropriate sized hole to use a screw extractor. Use a spanner or pliers to grip the screw extractor to ease (wiggle) the buttons out.

With luck, you may be able to drill the buttons with a bit that'd let you slip the appropriate screw-driver/hex key (depends on style of fasteners used) through it to undo the screws.

That way you wouldn't even need to extract the remnants of the buttons... just alternate between loosening the two fasteners until the assy drops off with screws still captured.

I'll keep my fingers Xed for you.

[Mr Brush]

I recommend a small charge of C4 - usually loosens things up.

https://www.youtube.com/watch?v=7_PX1cVuaVA

[Waikikamukau]

Well, this is getting the better of me!

Managed to remove the covers … however, didn’t expect the screw heads to be buried so far into the casing - I didn’t bring my screwdriver set only my driver and I’ve nothing thin enough to poke around in the resultant holes to find the screw head. **sigh**

even flashing a torch inside the holes I can’t make out that a screw head is even there ��

Any other ideas, ppl? I’m leaning towards the c4 charges now …

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[Flintlock]

They will be allen head screws down there.
(Retired locksmith)

[Waikikamukau]

Ok ... so I'll remember to pack my allen key set, then.

[aldav]

Ok ... so I'll remember to pack my allen key set, then.

Imperial and metric.