I'm REALLY hoping someone here can help me. I"m the maintenance tech for a lawn company, and getting extremely sick of this problem. I have two Husqvarna LT series mowers, one a 7230 I think, and a 6130, both of which are constantly breaking down on me. Its always the same problem too. The bolt that holds the belt pulley on the spindle will break at least weekly, effectively chewing up spindle bearings and in one instance a complete assembly. Now I dont understand why this issue keeps happening, I'm putting them all in with the specified 45 lb ft of torque they call for, and yet they break. Is this a common issue or is it something caused by user error?