The Cybex Jungle Gym Assisted Dip Chin 17140, 17141, 17150, 17151, 17160 machines have the top 2 weight plates pinned (Pin part number: 8640-330) to the top weight to act as a counter weight for the proper return of the Leg Bar assist: See Picture
Cybex Jungle Gym Dip Chin Weight plates attached to Top Weight
