It is the PTO belt. Belt and spring come off right after I select the deck level (usually on 1, but today i tried it from 4 graduating down to 1 on very little grass height) and as soon as I pull out the pto button. Well today it came off AGAIN...just had it put on again last nite. We checked...
I have a 2004 cub cadet LT1050 50 in deck 26 hp mower that by 26 hours had thrown the deck belt and spring 3 times...I paid someone (again) to put a brand new factory authorized belt on; up to 46 hours now and it has thrown it 2 more times. Happens at start up as soon as I pull open the PTO...