I recently picked up an AC 416 and B-112, both hydros.
Both tractors keep throwing the main drive belt. On the 416 the belt seems to be too loose but the B-112 seems to have good tension but both throw the drive belt frequently. It seems to occur when changing forward/reverse or back.
Are there any tricks to setting these up so they will not jump off the rear pulley? The front belt guard is in place on both tractors, it always jumps off the rear and can be a real PITA to get it back on again.