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Ford 640 unloader plug stuck!

M

metalurge

New User
I can't get the unloader plug out of the lift cover on my tractor. I've tried using the recommended methods on this forum, but it will not budge. And I'm afraid of stripping the 1/2-20 thread out of the plug. I threaded a bolt part way into the plug and I have a split bearing clamp on the bolt with a spacer on each side. I'm using a 1/2 breaker bar to tighten the bolt into it, but the plug does not budge at all!
Maybe a slide hammer would work better?
What happens if the thread strips out?
 
Will probably get reprimanded for this but, I have always used a hammer and punch and drove the valve and plug out from the opposite end.
 
Last one I did I used all tread and a big washer and then a nut and screwed the nut down and the valve came right out
 
Is that threaded plug not seated on an internal shoulder?
Also If I did that, I would have to destroy the unloader valve, I think? And that would be expensive. But I guess a lot cheaper than buying an entirely new cylinder with valves etc. If it would work.
I wonder if somebody loctited that plug in there?
 
OK. I got it out.
The bolt and washer trick didn't work, so I made up a slide hammer with some 1/2-20 threaded rod, a chunk of heavy bar with a hole in it, and a nut welded on one end of the rod. Two blows and the plug popped right out.
 
You might get away with doing that on an NAA but never on a hundred series or later model.

Ruin the unloading valve.

Zane
 
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