Zt 0561 help please

[Tim64]

I have a zt 0561 and the Lockhart is so stiff I can hardly close it any ideas on how to make it easier to close

 

[REK Knives]

Try loosening the pivot up and putting some oil on the detent ball

 

[ShitsInaBush]

I had a similar situation where my my frame lock on my 560 was sticking and came to be almost impossible to unlock. I used graphite from a # 2 pencil and it completely took care of the lock sticking to the tang. I would wipe off any excess oil from the tang and try graphite or you can use permanent marker from a sharpie. I know some hardware stores or locksmith companies sell graphite dust in small bottles.