Bedroom slide breaking shear pins

DSP; I don’t believe that I can help you! But I did break a shear pin one time in 2003 I was retracting my slide out in my 1999 Fleetwood and the slide out roller went over a small thin children’s book. I was going up that steep hill just before you get to Yosemite and my slide out extended out when I went around a corner. I didn’t have my slide out lock in place. After locking the slide into place I went to a RV repair shop and got the shear pin replaced. The RV Mechanic told me that the slide out has to be perfectly level with no obstructions in the way of the rollers, rollers free from debris and no binding in the slides (alignment). Good Luck, Rooster