 |  | | | |  | |  |  | Crosman 1377 rebuild |  | |  |  | |
 Posted: Mon Jan 05, 2009 5:44 pm |
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| dmh |
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| I've lost compression and need help rebuilding my pistol but I don't know where to start. Can anyone help? |
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| Posted: Mon Jan 05, 2009 8:01 pm |
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| AirGunEric |
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| Joined: 20 Jan 2007 |
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| Location: "Out There" |
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There are a couple of versions of the 1377, but here's the basic diagram:
http://www.crosman.com/pdf/manuals/crosman/1377/C1377-EVP-1&2.pdf
If you've lost compression, it is likely the pump cup that needs replacing (part # 760-140) which costs about $2.00 from Crosman. You can also try lubricating it and see if this (temporarily) fixes the problem, but if it's ripped you're beat.
And, Welcome to AirGunHome.com |
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| | | | | | | | | Re: Crosman 1377 rebuild | | | | | |
| Posted: Mon Jan 05, 2009 10:34 pm |
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| DerekVinyard |
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| dmh wrote: |
| I've lost compression and need help rebuilding my pistol but I don't know where to start. Can anyone help? |
Most of the time it is very simple. Carefully pull the airgun apart, get the diagram from the crosman site. Broken o-rings reveal themselves instantly. Other seals can be more complicated, but the design is simple. As Eric says, it's most likely the piston cup. Get opportunity to get a FTP. |
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| Posted: Tue Jan 06, 2009 8:46 am |
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| cw |
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| FTP is a bad link for me. |
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| Posted: Tue Jan 06, 2009 9:08 am |
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| Slavia |
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| Quote: |
| FTP is a bad link for me. |
DerekVinyard - is it possible that you meant "flat-topped piston" and underlined it for emphasis? (So it looks like a link.) |
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 ¡Listo! ¡Apunte! ¡Fuego! |
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| Posted: Tue Jan 06, 2009 1:34 pm |
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| DerekVinyard |
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Strange, I didn't underline it... Perhaps I bumped some keys and did, who knows. Big hands, small laptop.
| Slavia wrote: |
| Quote: |
| FTP is a bad link for me. |
DerekVinyard - is it possible that you meant "flat-topped piston" and underlined it for emphasis? (So it looks like a link.) |
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| Posted: Tue Jan 06, 2009 2:46 pm |
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| rsterne |
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FTP. means "File Transfer Protocol" to a computer, and it often thinks it's a link (especially with a period after it)....  .... put spaces between (F T P) and it won't try and outguess you.... 
Bob |
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Dominion Marksman Silver Shield - 5890 x 6000 in 1976, and downhill ever since!
Airsonal: Too many to count! |
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| Posted: Tue Jan 06, 2009 3:14 pm |
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| AirGunEric |
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You can type FTP just not with a period immediately after/attached to it!
FTP vs. FTP. ! |
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| | | | | | | | | 1377 | | | | | |
| Posted: Tue Jan 06, 2009 6:07 pm |
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| dmh |
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Thanks guys. I have a cup on order.
I've been shooting this air gun for 25 years and I'm not done yet!
New cup worked. I'm rockin again. Thanks again guys. |
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| | | | | | | | | Crosman 1377 rebuild | | | | | |
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