Sliding Door Hinge Latch - How to drive little pin out and replace spring?

[cunning plan]

So I am asking for my for sale thread as it may help someone if they buy the hinge and want to replace the spring: http://forum.earlybay.com/viewtopic.php?f=27&t=75661

Does anyone know how the spring which controls the latches is replaced in the main housing with the roller wheel / bearing:

It looks like the pin that holds the spring should punch through from the roller wheel side, but does anyone know for sure?

:sign0009:

Thanks!

 

[chug]

Yes that pin does get driven out with a pin punch, cant remember if the roller needs removing or not.
There's a small e- clip which needs removing first, this sits on top of one of the latches, between it and the body of the mechanism.