In 1982 I got a new IHC 800 12x30 semi mount planter and hooked it to my 1973 MF 1135. Everything was fine till I filled both hoppers all the way, then I could not raise my lift assist wheels. The tractor checked out fine, so IHC traded the cylinders on the lift assist wheels for bigger cylinders and it worked fine. Maybe your easiest fix would be bigger cylinders. Hope this helps.