Sanwa JLF - need help the stick do not perform well


i dont know the names for the parts where my problem is so i will descripe them

the spring is insert in a “black item” this black item sit on a silver spacer under this silver spacer is a white plastic thing

My Problem is the silver spacer moves if i push the stick with force instead of stay on its place… therefore the stick does not perform well…

the black item moves althou (maybe it is supposed to move im not sure but im sure the spacer is not suppost to move!)

since the spacer and the white plastic thing is lubricated with fat i do not know if i should clue it on place can someone help me ?

someone know how the sanwa jlf is assembled and how the silver spacer is hold in place and can help me out? i would be realy happy…