760 is leaking

760 is leaking

Joined: March 1st, 2002, 12:22 am

October 29th, 2011, 4:32 am #1


near as I can figure, in one of three places:

the transfer port connection, the barrel connection to the gizmo that interfaces it to the TP, or the bolt probe isnt sealing

Tomorrow I'll dust it with baby powder and try to narrow it down and fix it.

and does anybody know if 1760 barrels are choked?


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the Lunatic Fringe of American Airgunning
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Joined: February 25th, 2011, 10:27 pm

October 29th, 2011, 8:12 am #2

the barrel gizmo new or was it reused...? I had a problem with my reused one when I tried to super glue the barrel to it.. Apparently the super glue couldn't take the shock... I used JB Weld after and now it's on there for good until I change it out for a new one...
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Joined: February 9th, 2006, 10:35 pm

October 29th, 2011, 11:33 am #3

near as I can figure, in one of three places:

the transfer port connection, the barrel connection to the gizmo that interfaces it to the TP, or the bolt probe isnt sealing

Tomorrow I'll dust it with baby powder and try to narrow it down and fix it.

and does anybody know if 1760 barrels are choked?


dr_subsonic's pneumatic research lab

the Lunatic Fringe of American Airgunning
Southwest Montana's headquarters for Airgunning Supremacy
Proud Sponsor of team_subsonic
I don't think any Crosman barrel is choked, at least not on purpose anyway. The LW barrels on the custom pistols maybe, but not 1760 barrels.

I know that the bolt is not a tight fit in the gizmo that holds the breach end of the barrel. I've felt blow-by from around the mag when shooting my wood stocked, 1760 barreled, 760 at more than the usual 5 pump target loads.

I plink, therefore I am.
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Joined: April 28th, 2010, 12:23 am

October 29th, 2011, 2:54 pm #4

basically a hydraulic jack and two clamps that were slightly smaller than the od of his barrel. press, turn , press, turn, press, turn, press, turn.eventually he reduced the mozzle from 177 to 165 or171 perfectly round.pretty sweet.,
Last edited by robnewyork on October 29th, 2011, 2:59 pm, edited 1 time in total.
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Joined: April 28th, 2010, 12:23 am

October 29th, 2011, 4:53 pm #5

crazy glue and duck tape should fix it dan!!!! nt
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Joined: March 1st, 2002, 12:22 am

October 30th, 2011, 4:46 am #6

near as I can figure, in one of three places:

the transfer port connection, the barrel connection to the gizmo that interfaces it to the TP, or the bolt probe isnt sealing

Tomorrow I'll dust it with baby powder and try to narrow it down and fix it.

and does anybody know if 1760 barrels are choked?


dr_subsonic's pneumatic research lab

the Lunatic Fringe of American Airgunning
Southwest Montana's headquarters for Airgunning Supremacy
Proud Sponsor of team_subsonic
At least where I can feel. Maybe at/around/thru the bolt probe, but no where else I can feel.

I reused the gizmo that came with the gun. it is JB welded together....

Reason I was asking about the choke... thinking of cutting the barrel down a bit.


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Southwest Montana's headquarters for Airgunning Supremacy
Proud Sponsor of team_subsonic
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Joined: April 28th, 2010, 12:23 am

October 30th, 2011, 5:30 am #7

now im confused lol.nt
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Joined: March 1st, 2002, 12:22 am

October 30th, 2011, 6:16 am #8


took the one clamshell off, pump it and dry fired... not leaks felt around the areas mentioned.

 


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Joined: April 28th, 2010, 12:23 am

October 30th, 2011, 2:51 pm #9

temporary hiccup, mine wouldnt pump at all one day , then started workin again, no explanation at all
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Joined: January 29th, 2002, 1:26 pm

October 31st, 2011, 1:51 am #10

At least where I can feel. Maybe at/around/thru the bolt probe, but no where else I can feel.

I reused the gizmo that came with the gun. it is JB welded together....

Reason I was asking about the choke... thinking of cutting the barrel down a bit.


dr_subsonic's pneumatic research lab

the Lunatic Fringe of American Airgunning
Southwest Montana's headquarters for Airgunning Supremacy
Proud Sponsor of team_subsonic
I've used a pipe cutter to shorten the Crosman barrels. Takes some time for cleaning up the end and recrowning. I believe the pressure from the cutter will choke the barrel. Try this at your own risk!! Dave
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