Just acquired an old set of three gang mowers marked as manufactured by "T Green". The cylinders are chain driven from the wheels, but even when I slipped off the chains some of the wheels were still stuck. Even stranger, they run fine in reverse with a ratchet type clicking sound. One of them runs fine with both wheels, one has one side sticking and third is stuck on both sides. Not sure what is going on here! Can anyone out there help??