My HF (Maybe it was Northern Tool?) collapsible hoist was purchased in the mid 90s. It has served well and still uses the original cylinder.

Lately, it has developed a habit of tilting to the left under load. Dangerous tilting. When we have to lift an engine rather high I stand on the left rear leg to counter the lean. The hoist is lowered as quickly as possible.

After a thorough examination I found that the hinge holes for the boom were wallowed out and allowing the arm to lean to one side. I bored the holes and made a larger pin. The lean has improved but not gone away. As best I can tell the left leg pin hole is a bit worn. This lets the leg lift, causing the rig to lean.

I plan on getting it straightened out before it gets used again.