Early sliding door lock removal

[badgerfax]

Evening all, some advice required please.

I have just acquired a replacement early sliding door handle but need to replace the barrel.
I can not see any grub screw just the top of a pin that does not appear to go all the way through.

Any tips to getting this out and freeing the barrel.

[BOXY]

It sounds like that could be the grub screw. You need a tiny allen key to get it out.

[badgerfax]

Ok finally had some time to look at these locks.

The barrel from my damaged handle came out fine as there was a tiny grub screw as advised. Was a really small slot head.

The replacement handle has no key so I want to swap barrels. The problem is the other handle has no grub screw. I had a dig about with a pin to clear the crud out and can find no means of removing the pin. Any ideas before i muller it with a drill.



The sides of the hole show no signs of a thread and its a larger diameter hole than the other handle.
Would be good to hear from someone who has done this before.
Cheers