There should be some kind of spring in there to keep the pins in place. Not sure what that specific AK uses.

 

A retainer spring or a plate retains the axis pin(s).
There is a groove in the pin shaft that the the spring seats in or im the retainer plate.
There is a specific way the pin is installed to properly secure both the trigger and hamner axis pln.

I.picyure of the various wire retaoner installation.
The plate type retainer is a more simple install and removal.

Google Image Result for https://imagizer.imageshack.com/v2/640x480q90/912/hkm4lU.jpg

AK47 / AK 74 Hammer and Trigger Pin Retainer Plate – AK Operators Union Local 47-74 https://share.google/90lziqwgpvnObXujr

 

From those images, I have the Century Style spring set-up, and the left arm of the spring appears to be down in the groove.
Is it possible to change just that spring to a different style?

 

From those images, I have the Century Style spring set-up, and the left arm of the spring appears to be down in the groove.
Is it possible to change just that spring to a different style?

The plate type retainer shown in the link above is the best option for ease of removal and install.

 

Ordered...thanks!

 

Plate should arrive tomorrow. I found this installation vid on Youtube...looks good.

 

Yep., sometimes a little minor file work for final fitment is need. But most often a drop-in fitment.