Have a Lullabye Crib - 28 yrs old, no instructions...

Question

This is wood crib with one side that moves up and down, has moveable bar on bottom for lock/release of the side and two round metal supports/attachments on each end that hold this side up/down. there is an L shaped metal support that is attached to this side also that appears to support the mattress but the mattress is actually held at various levels by a type of four s hooks. It is together correctly i think but the wooden side with holes where it attaches to the vertical supports appears the holes are swollen since the side doesnt slide at all easily, difficult to force.