i have a model that i want to rig or get rigged that i want to offer as a freebie but i suck in poser and rigging it has proven beyond my talents so i was hoping someone could help me figure out what im doing wrong or if its just not possible

the item is a hydraulic engine lift for working on cars it has 2 parts that have 2 points of control

1 is a pivot point and the other is a connecting pin to keep it in place

also i have a hydraulic floor jack that needs the same basic rigging so learning this would make 2 models availible for people who need them

any assistance would be appreciated