o.k...I run an Exmark Viking 52" for my main mower...about a year ago, I purchased a new deck to replace the old one...today, that 2" pin the idler pulley with the trun-buckle is fastened to broke off and there's a hole the size of a lemon in the deck....i had it repaired at a welding shop...now my question is this: is there a defect in that area of the deck? I know Exmark made a modification on both those pins from the original deck. What would cause a problem like this, maybe the turnbuckle to tight? I checked the pulley and it turns freely. I've never used double blades on this mower and I haven't hit anything that would cause damage.