How much weight will a IH 140 lift?

I had a fast hitch on my SA for years without the spring. It lifted all my fast hitch implements including my 60 gallon sprayer as well as my 130 with the spring. I did try to avoid heavy lifts without the spring. My 130 has never been apart and it still has an edge on 140 when it comes to a lift. They both lift my MF-25, 24 blade disk with 18" blades, 1-1/4" arbor bolts and matching spacers. As I said, 130 has the edge, however they are each close to their lift limit on that disk with 3 point. My 3 point is my own design and manufacture and will enable these tractors to lift more than with fast hitch. My guess is that disk is close to 1,000#.

He's trying to lift a tandem tool bar planter with offset planters on the rear tool bar behind the front tool bar. I don't know how many planters he has on there, but suspect there is too much weight is too far back from hitch point. I see those vegetable planters working around here and even a unit no wider than tractor requires 50 hp just to handle the weight.

I also build 3 point hitch kits for these tractors, and am currently designing a rear rockshaft mounted on final drives and raised by a remote cylinder. Problem is, I'll never sell one of them, no one will pay the money. At last count, I'm over $2,500. just for the 3 point hitch and rockshaft. If one uses enough front end weight to utilize this hitch, where is the next weak point, "torque tube or final drives"?

Thanks for the help, Jeff