Weight limit on the narrow frame sleeve hitch?
 

I was looking at getting/building some attachments for my 102 with sleeve hitch (it has the spring assist). Maybe a trailer ball adapter or a boom pole with crank. I understand I might need some weights on the front of the tractor for the pole arm, but I'm more concerned with the trailer ball and how much weight I could tow with it.

Thanks

I can tow my 12 ft x 8 ft Aluma trailer with my 106. I have only towed with it empty, though. That said, the spring assist is great for front implements (thrower and front blade) but almost useless with rear implements, i.e., a 10-inch plow, a Brinly box scraper if a cinder block is attached, and even the tiller. It is fine for a rear blade, cultivator if no weight is attached and a disc if no weight is attached. It will pick it up, but sometimes I really had to still almost stand in the footwells to raise the 10-inch plow. The later wide-frame spring assist was a bit better. And Deere tractors from the same time frame as the Cub Narrow Frame tractors The Deere, spring assist really was an assist, as it makes rear implements feel lighter.

My 106 had the OEM electric lift actuator, which I upgraded to a stronger Thompson electric actuator. But it is still slow lifting, like the original Duff-Norton electric actuator. But soon I'll put an actuator speed-up kit on it, and it will give me almost the speed of a hydraulic lift.:ThumbsUp:

I wasn't going to be lifting the boom pole with the sleeve hitch, just attach it to the tractor. I was going to put either a hand crank or electric lift on the boom to lift items. I was just concerned about the actual sleeve hitch itself whether it would break under too much load like lifting a heavy log with the boom or towing a heavy trailer

They are designed pretty stout and can take a lot of abuse. I've found traction problems happening if things get tough. They have no trouble pulling a plow through tough soil, I think you'll be okay with what you mentioned. I would be sure you have the correct length mounting bolts, assuring a proper connection to the transmission case. I've seen them mounted with the original cover bolts, which are now too short for proper strength.
Good luck!