Hi Gents,

I have been fitting my wide radius K track turnouts with servos and have found one in particular giving me all sorts of grief.

The problem is where the tab piece slots into the turnout and locks into the mechanism - it doesn't stay locked in place unless I apply pressure to the area above the mechanism.
So what happens is when the turnout changes and the tab piece moves outwards, it loses connection with the mechanism and no longer operates.

I have spent too much time trying to get this one working, without success. I understand the mechanism is meant to come uncoupled when it is at a raised angle so that you can remove the tab piece.
However regardless of the tab alignment, it seems to uncouple after dozen or so operations (unless I apply pressure to the top)

I am wondering, has anyone disassembled the K track switches and can tell me what the mechanism looks like inside?
I am reluctant to disassemble one of my switches as it looks like removing the lower cover would essentially write it off.

It is always easier to understand with pictures, so here is what I mean by the 'tab piece' and then a red box showing the mechanism and a dot where I need to apply pressure for it to work without problems.

Hi John,

Thanks for the reply. I currently have the turnout lantern connected on the straight side and it so far works without issue.

I have tried connecting the tab without any of the surround pieces in place to ensure that the tab is connecting flat/straight as well as by trying the hand lever connected - but find in both cases that after a dozen or so operations it is still coming apart.
I will have to try your suggestion and do further testing.

I have often found that making a model train layout brings many real life engineering problems and this is a good example of one.
When it works, ask not why.