Nanking MF47 - Cannot adjust needle to zero (Solved)

[neutrino]

This is a old analog meter with no pcb, it belonged to my grandpa. The components are wired and mounted on a transparent orange plastic kinda board.

I noticed that the readings aren't accurate and that I cannot adjust needle to zero by turning the panel center pin screw, doesn't reach zero mark. Disassembling the panel shows the end of the center pin screw is a little scratched from wear.

How can I solve the adjustment problem ?  Can I adjust manually, without the center pin?
What about increasing the thickness of the pin ?

[PA0PBZ]

As far as I remember you set the needle position rotating the U shaped piece of metal below the center. The other side of the spring that is connected to the needle is connected to this. However, yours might be different of course.

[G7PSK]

Check the adjuster forks are astride the hair spring still, I have seen many cases where the meter has been knocked or dropped and this caused the hair spring to come out of the fork.

[neutrino]

Solved by rotating the U shaped piece of metal to the left.

Putting back the panel together was hard, the center adjustment screw pin barely fit inside the U.