</font><font color="blue" class="small">( So if the clutch won't let go you say the PTO engage and diengage lever is ineffective? If this is the case why is there a lever on the tractor.)</font>
Curious logic. Just because there is a lever, it must work. I'll have to tell my urologist that one.
</font><font color="blue" class="small">( If a duel stage clutch is hung engaged, and one moves the PTO lever to disengage, then the PTO is disengaged at the final output shaft.)</font>
Sorry, on a running tractor that is incorrect. If there are tolerance, installation, or seating issues with the PTO friction disc, it's entirely possible - even probable - that the PTO engage/disengage lever will be rendered useless till you shut off the engine. Sometimes not even then. Same if the clutch fingers significantly exceed the specified gap. The PTO friction disc can't disengage sufficiently from the flywheel, also rendering the PTO engage/disengage lever useless on a running tractor. And nobody wants to stop/start the engine every time they need to engage/disengage the PTO driveline.
</font><font color="blue" class="small">( Same if the trans stage of the clutch is engage, moving the shift lever to neutral disengages the trans. Parts still will turn, but are disconnected from their final drives. )</font>
Not the same. In fact, apples and oranges. PTO engage/disengage and transmission gear select levers are independent of each other. With a properly adjusted clutchpack, you can have the tractor transmission in neutral - and STILL have the PTO driveline engaged and turning. Think PTO shaft-driven log splitters, backhoes, pumps, generators.
Here's a thought. Go back up to the beginning of the thread, and try your hand at answering the original three questions. The whole idea of these self-help forums is for members to put their ideas on the table, then let the person asking the question pick up those they think may work best for them.
//greg//