Saturday, July 5, 2008

Bobbing a Crosman 357 Hammer

I bought a damaged Crosman 357 pistol a while back at the pawn shop for $10.00. The damage was to the hammer spur, which had broken off.

The hammer.

Besides being broken off, the pin was bent.

So I ground it down on the belt grinder, and deburred. I should probably have blued it or polished the whole hammer, but I just didn't feel like it.

I found a replacement pin in my collection of dowel pins.

Now this is where I humble myself. When I started this project, moths ago, I started to take apart the pistol. I had pulled the trigger a few times to make sure the CO2 cartridge was out of gas but I did not remove the CO2 cartridge...
Sure enough the safety was on, blocking the hammer, so when I started to take the pistol apart, WHOOSH! The whole thing exploded apart in a cloud of CO2. I spent hours finding all the parts (or most of the parts) and humbled, put all the parts in a box and tried to put it out of my mind for a while.
So the lesson is to always remove the CO2 cartrdge, even if you think it's empty...and always wear safety glasses...
Since I didn't have any pictures of the pistol assemby, I was a bit worried I'd have trouble putting it back together. I downloaded the exploded diagram (irony there...) as well as finding a good article on resealing it in Airgun Hobby magazine, Vol 4, No. 3.
It's worth noting that Airgun Hobby sells all their back issues, when I decided that I would pursue this hobby with vigor, I bought a complete set and subscribed.

The hammer back in place.

I was missing one of the two bushings that hold the tube seals in place (seen sitting on the corner of the tool post).

Drilling...

Parting it off.

So now I can reassemble it...

Surprisingly, I got it all back together with no problems.

14 comments:

  1. This is exactly why I don't want to work on "bulked" guns.

    And dang it, Nick. Now I want a bobbed hammer .357 snub nose.

    Derrick

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  2. Dear Contributors,

    I am from India and having interest in shooting and playing with instruments. I am damn impressed by the job you do and patience you have to post all of them.

    I don't miss any of your post!!

    Thanks lot and keep going.

    Best Regards,

    Tirtha

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  3. Thanks Tirtha!
    Send me an email sometime about Indian airguns.

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  4. I've got a 357 that's a great shooter, and the tang on the hammer is broken just like the one in this article. I was always discouraged about it and always wanted to fix it...I didn't know about "bobbed hammers". Now that I've seen this, I'm going to clean up the bobbed hammer a little and get happy about it :-)
    Thanks! Excellent blog - I'm going to spend a lot of time here ;-)

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  5. I am unable to put back a 1st generation Crosman 357 I bought recently. I have both the EVP diagrams available on the net.

    This

    http://www.shans2003.ru/images/Crosman357.jpg

    and the one at Crosman site.

    Any help or tips would be greatly appreciated.

    Thanks

    Manish
    India

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  6. Nick,

    I need to re-assemble a Crosman 357, fisrt generation. I hav ethe EVP's can't seem to get it right. Can you help me with it or share info from Airgun Hobby magazine, Vol 4, No. 3.

    Thanks

    Manish
    Mumbai, India

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  7. I didn't take any detailed notes, but you can ask on the Crosman forum, someone there might have assembly instructions:
    http://www.network54.com/Index/12861

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  8. the Crosman forum link. I searched for Crosman 357 assembly and got this link

    http://www.network54.com/Forum/275684/thread/1175905640/Help+reassembling+my+crosman+357+plleeeeaassee!

    The photos from biohazardman there helped completely.

    I am posting a link of my 357's internals assembled here.

    [URL=http://s576.photobucket.com/albums/ss209/point177/Crosman%20357/?action=view&current=assembled-back.jpg][IMG]http://i576.photobucket.com/albums/ss209/point177/Crosman%20357/th_assembled-back.jpg[/IMG][/URL]

    Many thanks for your help again. Please do continue your good work.

    Manish
    Mubai, India.

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  9. how does the trigger spring sit inside the airgun cant seem to figure it out , thanks

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  10. Can you help me put back a 1997 crosman 357
    I put it back together but the trigger won`t retract back and the clip won`t rotate
    I lost the front spring part number 037 on crosman`s manual
    What can i do

    contact me

    http://www.youtube.com/watch?v=hQskyOBbB1k

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  11. Many thanks for the informative info. I have a Crosman 357 that is missing Part 357-052. Any idea where I can spot a spare? I have looked at JG Airguns but John doesn't have it listed. Any help would be welcome. Could you build one? Thanks again, Nikos

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  12. Contact Crosman and see if they have the part?

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  13. I just received an email from JG Airguns, LLC, which stated that the reason I couldn't locate the 052 part was that it has now been replaced by a better quality index finger (code CRS357A052 priced at $1.30), probably because was so prone to breakage. Problem solved, it seems. Many thanks Nick and I will let you know how the rebuilt went (I am changing 11 parts in it!), at the end.

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  14. how can i get valve because my part leaking

    ReplyDelete