Sunday, April 3, 2011

Crosman 105 Disassembly, Part 1

I picked up this Crosman model 105 a while back on Gunbroker. It’s missing the grips as well as a few small parts but is otherwise in good condition. The 105 is the .177 cal model, the 106 is the .22 cal. model of this pneumatic pistol. There’s a general post about the 105/106 on the Pyramyd Air blog.


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The odd thing is that the pistol has no markings at all. I’m wondering if it’s a particularly early model or if it’s what we now call a “second”.


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Of course I love the loop pump lever. These are often found in a deformed state and later models changed the design so that the smaller open section is closed.


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No markings…


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Let’s get started/ One screw.


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It looks like it’s not original?


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The other screw wouldn’t unscrew.


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So I removed the barrel band/front sight.


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The dowel pin keeps it aligned, which is a nice feature.


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Ahh, it’s not a screw, but a screw headed pin.


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Removed.


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Then it’s a matter of removing the front pivot plug.


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A simple milled piece.


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And the piston assembly is pulled out.


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Linkage pin removed.


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There’s a setscrew which locks the piston adjustment.


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Pump cup assembly removed.


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I used a Taig 3 jaw chuck with soft jaws to get a grip on the pump cup assembly and unscrewed it.


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Fairly typical period pump assembly parts. More to come…

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