Frank S., If I were attempting to clean the cooling fins on the flywheel, I would remove the engine from the tractor. Not sure what manual you are using for flywheel shroud removal? With the engine removed, you would have alot more room for disassembly. Also, you can then clean the debris from the frame/clutch area. This is just my thinking, the engine in a 128 can be removed in under 40 minutes if not less.