Designer 35RLTS and Jayco Talk...Thanks Frank!!

petekerwien,
If you are breaking shear pins then you are jamming the slide against something or it has caught on something under it. I would try to manually crank it in and see if you feel any resistance to that. If not, then try manually cranking it out and see if it hits something on the way out. I would suspect that there is something under the floor that is jamming it. At least you have 24 hours of daylight to find the trouble! :B
Good luck.
Frank