Of car in front position of shaftway. First time. Been in the trade my whole life. .. and there is a hole in the ground. No sure how far the casing goes down ... I haven’t checked for piston connection to car yet. Will be there for planning Thursday
I have one like yours, single stage upright goes through the platform beside the COP connects to the cross head on a cantilevered car. That car had a bad bump when I got it. Jack wasn't plumb, and the bottom of the sling was hitting the head of the cylinder. Mostly because the welded brackets to the casing that secure the cylinder are only two feet off the ground. Really bad leverage with 10 feet or more of cylinder above that, something moved.
I have another that is the inverted jack, again through a cantilevered car. It's a 3 stop but has a basement with a full height door walk in pit. Made changing the packing on that one pretty convenient. But it still shakes like an old washing machine because of the rollers inside it. Another interesting design they used. I want to open it up and replace the rollers, but the customer doesn't want spend the money.