1377 Phase 2 Question

1377 Phase 2 Question

Joined: February 21st, 2009, 5:23 pm

June 23rd, 2011, 1:28 am #1

I have a 1980 1377 with the sliding breech cover. The gun is in very good condition despite it's age and the use it has seen. My question is, the chamber cover is very loose and just falls open. Is there a way to tighten it up? I don't see any adjustment on the breech.

Thanks, Marcus
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Joined: January 4th, 2010, 4:13 am

June 23rd, 2011, 1:38 am #2

If its just falling open I am wondering if the bolt o ring might be worn or shrunken.

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Joined: February 21st, 2009, 5:23 pm

June 23rd, 2011, 2:58 am #3

I've never replaced it. Does that help hold the cover closed? Can these o-rings be found at a hardware store or do I need to call Crosman?

Thanks, marcus
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Joined: January 4th, 2010, 4:13 am

June 23rd, 2011, 3:47 am #4

They are available. But get a size 003 and a 004 one will work for you,
You might have some luck taking the o ring to a auto parts store they usually
have an assortment in a kit.They are cheap enough through industrial supply
companies a couple of bucks will and change will buy 100 at a time for the
size you need.


I BRAKE FOR BISCUITS
and TRAINS
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Joined: February 21st, 2009, 5:23 pm

June 23rd, 2011, 11:25 am #5

Thanks James, I'll start checking around. I might get lucky and find one at work.

marcus
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Joined: February 21st, 2009, 5:23 pm

June 23rd, 2011, 7:20 pm #6

I lucked out and found the o-rings I needed at work today. I will tear it down this PM and have a go at replacing the bolt o-ring. Will I mess up the exhaust seal when I pull the breach off? I'm going to search the archives again and maybe replace the seal with pvc tubing. Who knows, I may end up with the 18" carbine I've been thinking about.

marcus
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Joined: January 4th, 2010, 4:13 am

June 24th, 2011, 2:12 am #7

If you go with the tubing mod on the breech to valve seal you should consider using poly tubing
instead of pvc, or if you can find it locally polyurethane works well I think it seals better.
There are some good suggestions on this mod that can be found using the search feature above.
When I cut the tubing I use a tubing cutter like for copper plumbing. By putting a rod or dowel
inside the tubing to keep if from collapsing you can cut it the same way as the copper and get it
square witch is hard to do using a knife.
There was a suggestion a few days ago about using teflon and Aquaseal that should work also
link below:

http://www.network54.com/Forum/275684/t ... l+for+13XX

I BRAKE FOR BISCUITS
and TRAINS
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