Crosman Model 600 Disassembly, Part 3

On I go...

I pushed the cross pin out, keeping the punch in the hole. The buffer assembly is under a little bit of spring pressure, so I kept my thumb over it when I withdrew the punch.

The cross pin.

The buffer comes out.

The buffer and hammer spring.

Now to remove the ring (or cam ring).

I pushed against the hammer and jiggled the ring off.

Then rotated the ring so the small end could clear the slot.

The ring.

This is the main problem the pistol has. There's a lot of clearance between the square hole and the cam.

You can see how chewed up it is. I'm not entirely sure what I'll do about this yet. I could try making a new one fron scratch, or sleeving this one. Or finding a replacement somewhere. We'll see.

Then the hammer comes out.

There's an internal o-ring.

Next I inserted my largest screwdriver into the front of the tube. and unscrewed the valve front. I will be making a special tool for this, but with care the screwdriver works fine.

I found I had to reinsert a punch into the cross pin hole to get enough torque to loosen the valve front. Otherwise the tube just spins.

The valve front comes out.

The valve front parts, screen, felt filter, washer and spacer.

Then the valve stem and spring.

I pushed the tube out the back of the frame.

The tube and frame.

The rear valve body is retained by two blind dowel "retainer" pins that are threaded internally. I threaded a screw into them and pulled them out.

Just a close up.

A retainer pin.

Notice the o-ring at the transfer port.

The rear valve body pushed out.

Interesting off-white o-ring seal.

Then I removed the o-ring from the port. That's everything disassembled that needed it.

Next I'll be disassembling the other 600 I have and scavenging what parts it needs to make at least one fully functioning pistol, as well as measuring what I hope is an unworn ring (cam ring) so I can duplicate it. The other 600's frame has a broken trigger guard and the pistol leaks slowly but feeds and functions fine. We'll see. I'll put up pics of any differences between the two as well.

Crosman Model 600 Disassembly, Part 2

On I go...

Next I removed the set screw that holds the barrel in place.

Which slides out the front of the frame.

It's easy to put a longer barrel on, as you can see.

Next I removed the safety.

The safety assembly.

I took a deep breath and removed the cover plate for the trigger.

Parts stuck to the plate which caused a few moments of head scratching.

Here's what it should look like.

Another view. You can see a line on the conical boss where one of the spring ends should rest.

And another view. You can't have too many views of complex mechanisms...There are variations on the trigger mechanism components as well between different years of the 600.

The pawl and link.

The sear.

The hammer sear?

The trigger.

Next I removed the slide screw.

And slid the slide out.

There was just a spring here when there should have been a ball and possibly a spring guide pin.
That it was bent tells me someone tried to make up for the space of a lost ball.

The slide is slightly dovetailed into the frame.

More to come...

Crosman Model 600 Disassembly, Part 1

Derrick sent me a Crosman model 600 pistol to play with. It wouldn't feed reliably and was in poor shape, generally.

He shipped it with the grips already removed. Not that it would have added much to the process.

The 600 is a true semi-automatic pellet pistol, 10 round in line magazine.

I removed the piercing cap. There are several variations of this and I'll show another one later when I disassemble a second 600 I recently acquired.

I removed the rear sight screw.

A tiny ball bearing provides the detent for the sight elevation.

Sight components.

The rear cover is up next.

Held on by a screw and lock washer.

It retains the magazine spring.

I removed the spring and pulled the follower towards the rear. The knob is retained by an allen set screw.

With the knob removed the follower comes out. Here are the parts so far.

Here you can see the set screw, knob and follower.

The feed arm on this pistol is retained by one set screw. On others it may be retained by two.

With the screw removed the cam slides out the magazine tube.

The feed arm, cam and set screw.

The feed arm is a bit scarred up, likely due to inexpert unjamming technique (brute force with a screw driver).

More to come...