Crosman 180/187/400 cocking/hammer assy disassembly?

[Jirushi]

Hi,

I recently bought a 187 in need of tlc.
One of the things is that the small spring that normally surrounds the rod in the cocking mechanism,
somehow migrated to the inside of the hammer.
I pulled it out.
Now I need to disassemble the assembly in order to fit a new small spring so that the cocking nob returns to "home" after cocking the gun.
A friend managed to do this in his 400 by tilting the rod, and pressing it out of the circlip that prevent the rod from getting out of the hammer.
However, this does not work in my 187 and I am afraid to cause damage if I continue to try.
I think the darker top of the hammer, the part that actually hits the valve stem, needs to come out.
Has anyone one here got experience with doing that?
I think it is either pressed together in the hammer, of perhaps held in place with Loctite?
But that would be the logical way to get the cocking rod out.

Any advice is welcome.

Many thanks,
Louis

[happymecanic]

Hi Louis, on my  187 I see that the pin is riveted on the back of the hammer. Is it the same on yours? Maybe try to gently press the pin out? I can't offer more advice as I never did it, good luck!

[Big Bore Bart]

  The striker tip is removed for access to the circlip.  Some were pinned , others were just press fit.  Date of mfg is the difference.

[Jirushi]

Hi Louis, on my  187 I see that the pin is riveted on the back of the hammer. Is it the same on yours? Maybe try to gently press the pin out? I can't offer more advice as I never did it, good luck!

Thank you very much. The rod can stay in the cocking knob which is on your photo, but I need to get it out of the hammer.
I think you are right that I need to press it out of the hammer.

[Jirushi]

  The striker tip is removed for access to the circlip.  Some were pinned , others were just press fit.  Date of mfg is the difference.

Thank you Big Bore Bart.

This is a "later" 187 with the removable trigger compartment.
Would that mean it's probably a press fit?
If so, is the correct technique to carefully knock on the cocking rod, to tap the striker tip out?
Many thanks, Louis

[ped]

that's how i would do it Louis
i've not stripped a 180 one but have done a few 1377 ones and you'll find you have to punch the cocking rod out of the knob to replace the spring
in most cases there will not be anything left to peen over to secure the knob back on so you'll possibly have to bond it on or try to get a new rod

[Tack Driver 10]

This is how I fixed one.

If the end cap is pressed on tap it out.
Drill and tap the cap 10-32 or metric if you choose.

You can make a new rod or use a 2 1/2" 10-32 SS shank hex bolt.
You'll have to modify it some but it will screw onto the cap and can be removed and adjusted in the future.

If you make a new rod then you can tap the cap 8-32 and cut a shoulder on the new rod like the original.
Probably how it should have been done initially.

[Jirushi]

This is how I fixed one.

If the end cap is pressed on tap it out.
Drill and tap the cap 10-32 or metric if you choose.

You can make a new rod or use a 2 1/2" 10-32 SS shank hex bolt.
You'll have to modify it some but it will screw onto the cap and can be removed and adjusted in the future.

If you make a new rod then you can tap the cap 8-32 and cut a shoulder on the new rod like the original.
Probably how it should have been done initially.

Thank you very much. Great idea. Unfortunately, I lack the skills to do this.

[Jirushi]

that's how i would do it Louis
i've not stripped a 180 one but have done a few 1377 ones and you'll find you have to punch the cocking rod out of the knob to replace the spring
in most cases there will not be anything left to peen over to secure the knob back on so you'll possibly have to bond it on or try to get a new rod

Cheers Ped.

I got the rod out by removing the core of the hammer.
By pushing the rod to the bottom, and putting my BSA Superten buddy bottle adapter on the top of the hammer.
Then hammering the buddy bottle adapter.
I'll have to found a suitable spring now.

[oldair]

Louis, could you post a pic' of the disassembled hammer and pin please?  I've never had a need to take one of these apart, would like to understand how they are put together.

Thank you!
Don R.

[Jirushi]

Louis, could you post a pic' of the disassembled hammer and pin please?  I've never had a need to take one of these apart, would like to understand how they are put together.

Thank you!
Don R.

Hi Don,

I hope this helps.
You can see how the small spring, that should be around the cocking rod, had miraculously ended up in front of it.

[happymecanic]

Thank you for the picture Louis! That will be of some help for me too .

[TerryM]

Louis, could you post a pic' of the disassembled hammer and pin please?  I've never had a need to take one of these apart, would like to understand how they are put together.

Thank you!
Don R.

Hi Don,

I hope this helps.
You can see how the small spring, that should be around the cocking rod, had miraculously ended up in front of it.

X2.  I've never had one of these apart.

[Tack Driver 10]

Here's one from an SSP 250 FWIW.

[oldair]

Thank you Louis and Tackdriver - never know when a buggered hammer assembly will show up, now I know how to handle it.

Don R.