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Pushed this pin out.
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Came out easily.
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Removing the pivot bolt lock screw.
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Barrel and breech removed.
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Lack of a breech seal...need to make one.
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That rivet looks like it won't come out, being flared out at the ends.
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But it pushed out easily.
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Trigger & spring.
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Cocking transfer bar slides forward, up and out.
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Trigger pull screw on the right, lock screw on the left.
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Mist be missing the plunger/ball on the end?
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Disassembled.
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Lock screw removed.
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The end cap lock screw was missing.
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Cap unscrewed.
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Just like the other Diana 5.
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The piston was stuck so I resorted to this insane solution, my home made slide hammer vise grips holding a bent hook tool...
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Which gripped the inside of the piston slot.
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Braced in the vise with a piece of brass rod through the pivot holes.
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The piston was pulled out.
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Unlike any other Diana piston head.
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And the head is loose...If anyone has taken apart a similar Diana and has a picture of a good condition piston head like this I'd love to see it. As is I'll probably whip up a replacement dovetailed head that matches the later 5 and solder it in.
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You can see the step inside the piston that the head butts up against.
Now to get to work fixing the problems and getting it to shoot.