Purchased my GC2300 about a month ago with 333 hours on it. I don't believe the previous owner knew what a grease gun is. Some of the fittings required breaking the ball lose, so the grease would go in. The 6' belly mower squeals when it is engaged. I disconnected the belt and it seems to be coming from the shaft (u joints) or the bearings in the tower. Haven't been able to find a parts list for it.