Crosman 105 Disassembly, Part 2

On I go…

The grip frame is held by two screws, just like on every other Crosman pistol of this type.

Grip frame.

The pivot pin for the sear was missing. I’ll find a suitable replacement.

There’s a nice slotted guide for the sear spring.

The safety spring was missing. The detent ball was still at the bottom of the hole.

The trigger pivot pin. Knurled at one end for retention.

The safety. A complex little part.

The trigger.

The rear sight. I removed the two setscrews.

Drifted it out of the dovetail.

The end cap is retained by two small setscrews.

It comes out a little under hammer spring pressure.

Then the spring comes out and the hammer…Can’t remove it yet as the cocking knob is in the way.

A screw retains the knob.

That’s a small spring washer for slight tension on the knob.

The hammer.

The bolt is held in by the cocking pin. It has to be unscrewed through the slot.

The cross hole had a spring in it that shot across the room. Live and learn. Maybe I’ll find it but more likely I’ll have to make a replacement.

Valve nut needs a special tool to remove it.

Valve nut.

I pushed against the inlet valve with a 3/16” brass rod.

The valve components.

Here’s how it looks assembled.

Inlet valve.

Exhaust valve. I’ll make replacement seals for both.

The whole gun apart. Now to reseal, replace parts and get some grips.

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.

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”.

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.

No markings…

Let’s get started/ One screw.

It looks like it’s not original?

The other screw wouldn’t unscrew.

So I removed the barrel band/front sight.

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

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

Removed.

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

A simple milled piece.

And the piston assembly is pulled out.

Linkage pin removed.

There’s a setscrew which locks the piston adjustment.

Pump cup assembly removed.

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

Fairly typical period pump assembly parts. More to come…