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 Post subject: Crosman Mk.1 issues
PostPosted: Sat Feb 04, 2017 12:44 pm 
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Joined: Tue Sep 23, 2014 6:30 pm
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Location: Cambridge, Ontario
Hello all I am wondering if anybody has experience with fixing Crosman Mk.1's mine seems to have the issue that it does not have 2 cocking positions and minimal if any power

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Thomas

Gletcher NGT-R | Crosman 2240 | Crosman 2240 (Polished) | Frankenrifle (22xx derivative) | Slavia 618
Walther PPK/s | Umarex SA177 | Umarex XBG | Hatsan AT44 | Crosman Vantage | Baikal IJ-22


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 Post subject: Re: Crosman Mk.1 issues
PostPosted: Sat Feb 04, 2017 12:55 pm 
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sounds like your trigger screw is in too much...as for power depending on your model year there should
be an adjustment screw on the front section just below the barrel you need to turn it in...if nether works you need to dissemble it might be an internal issue...

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 Post subject: Re: Crosman Mk.1 issues
PostPosted: Sat Feb 04, 2017 2:37 pm 
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Location: Cambridge, Ontario
Ace wrote:
sounds like your trigger screw is in too much...as for power depending on your model year there should
be an adjustment screw on the front section just below the barrel you need to turn it in...if nether works you need to dissemble it might be an internal issue...


The peculiar thing is that i adjusted said power screw to both extremes and the power either was so insufficient that the round didn't leave the barrel or that the max power was only enough to spit out the pellet about a foot or two away as for the trigger screw i will attempt to loosen it but i am flabbergasted as to what the heck is wrong with it.

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Thomas

Gletcher NGT-R | Crosman 2240 | Crosman 2240 (Polished) | Frankenrifle (22xx derivative) | Slavia 618
Walther PPK/s | Umarex SA177 | Umarex XBG | Hatsan AT44 | Crosman Vantage | Baikal IJ-22


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 Post subject: Re: Crosman Mk.1 issues
PostPosted: Sat Feb 04, 2017 10:34 pm 
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trigger screw should be the the issue with the two stage cocking...now as to power from your explanation
sound like all the co2 is not being expelled out the valve....or somethings blocking it
was it working fine before and this just happen all of a sudden ? or
did you just get the MK1 and it was never shooting strong to begin with..?

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 Post subject: Re: Crosman Mk.1 issues
PostPosted: Sun Feb 05, 2017 6:33 pm 
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https://mac1airgun.com/rebuildpartstechniques.html


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 Post subject: Re: Crosman Mk.1 issues
PostPosted: Sun Feb 05, 2017 8:33 pm 
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Location: Ontario, Canada
Pull off the barrel shroud and have a look at the end of the valve stem. Maybe something is blocking the hammer from smacking the stem properly. Also check the hammer spring. Maybe it's getting weak. I have owned about a dozen Mk1 pistols and I did have one with a weak spring. Also check to make sure your barrel port lines up with the frame port.


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 Post subject: Re: Crosman Mk.1 issues
PostPosted: Sun Feb 05, 2017 10:45 pm 
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TCooper wrote:
Pull off the barrel shroud and have a look at the end of the valve stem. Maybe something is blocking the hammer from smacking the stem properly. Also check the hammer spring. Maybe it's getting weak. I have owned about a dozen Mk1 pistols and I did have one with a weak spring. Also check to make sure your barrel port lines up with the frame port.

yes that's another possibility...forgot to mention that... :wink:
if that were the case you would feel air coming out around other areas of the MK1

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 Post subject: Re: Crosman Mk.1 issues
PostPosted: Fri Feb 10, 2017 9:35 pm 
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Location: Cambridge, Ontario
Ace wrote:
trigger screw should be the the issue with the two stage cocking...now as to power from your explanation
sound like all the co2 is not being expelled out the valve....or somethings blocking it
was it working fine before and this just happen all of a sudden ? or
did you just get the MK1 and it was never shooting strong to begin with..?


It never shot strong to begin with if i am honest.

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Thomas

Gletcher NGT-R | Crosman 2240 | Crosman 2240 (Polished) | Frankenrifle (22xx derivative) | Slavia 618
Walther PPK/s | Umarex SA177 | Umarex XBG | Hatsan AT44 | Crosman Vantage | Baikal IJ-22


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 Post subject: Re: Crosman Mk.1 issues
PostPosted: Fri Feb 10, 2017 10:49 pm 
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Location: Ontario, Canada
Please post how everything worked out with your Mk1. The above suggestions should give you some results. Also check the filter screen for debris, but I have never seen this as a problem.

Your Mk1 is over 30 years old. Springs get tired, debris accumulates, and the barrel alignment can get twisted when people mess with it. My guess is the barrel port being misaligned.


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 Post subject: Re: Crosman Mk.1 issues
PostPosted: Sat Feb 11, 2017 4:02 am 
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Location: Alberta Canada
TCooper wrote:
Please post how everything worked out with your Mk1. The above suggestions should give you some results. Also check the filter screen for debris, but I have never seen this as a problem.

Your Mk1 is over 30 years old. Springs get tired, debris accumulates, and the barrel alignment can get twisted when people mess with it. My guess is the barrel port being misaligned.


Will fully agree with Todd here. New seals new springs and a good cleaning will indeed put the fie back into that Mr I

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 Post subject: Re: Crosman Mk.1 issues
PostPosted: Sat Feb 11, 2017 9:43 pm 
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Location: Cambridge, Ontario
Whitewolf wrote:
TCooper wrote:
Please post how everything worked out with your Mk1. The above suggestions should give you some results. Also check the filter screen for debris, but I have never seen this as a problem.

Your Mk1 is over 30 years old. Springs get tired, debris accumulates, and the barrel alignment can get twisted when people mess with it. My guess is the barrel port being misaligned.


Will fully agree with Todd here. New seals new springs and a good cleaning will indeed put the fie back into that Mr I


Wish me luck y'all with all your help i might get to experience this piece of history actually fire! If/when i do i will provide images of completed project.

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Thomas

Gletcher NGT-R | Crosman 2240 | Crosman 2240 (Polished) | Frankenrifle (22xx derivative) | Slavia 618
Walther PPK/s | Umarex SA177 | Umarex XBG | Hatsan AT44 | Crosman Vantage | Baikal IJ-22


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 Post subject: Re: Crosman Mk.1 issues
PostPosted: Sat Feb 25, 2017 1:03 am 
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Location: Sidney, BC.
I'm thinking the barrel port is miss aligned.....KEN.


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 Post subject: Re: Crosman Mk.1 issues
PostPosted: Sun Feb 26, 2017 12:29 am 
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Location: Ontario, Canada
Here is an old review I did on the Crosman Mark 1. I once had a web site with many lengthy reviews but it was lost (Airgun Trivia). "KEN." was a big help with the Mk1 information, as was Leonard Joe. Anyway, someone saved it to their own web site. Oh happy day!

http://co2airguns.net/Collection/Crosma ... istols.htm


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 Post subject: Re: Crosman Mk.1 issues
PostPosted: Sun Feb 26, 2017 10:32 am 
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Joined: Tue Mar 17, 2015 7:43 pm
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Location: Estrie, Québec
TCooper wrote:
Here is an old review I did on the Crosman Mark 1. I once had a web site with many lengthy reviews but it was lost (Airgun Trivia). "KEN." was a big help with the Mk1 information, as was Leonard Joe. Anyway, someone saved it to their own web site. Oh happy day!

http://co2airguns.net/Collection/Crosma ... istols.htm


Your old website has been partially archived on the Internet Archive Wayback Machine, but most pics are not there:

http://web.archive.org/web/*/http://my.tbaytel.net/coopers/

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 Post subject: Re: Crosman Mk.1 issues
PostPosted: Thu Apr 06, 2017 10:14 pm 
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Location: Cambridge, Ontario
For anyone who was curious i ended up sending the pistol off to R&R airgun repair. He ended up having to replace the valve stem realign the barrel and did some work to the trigger she shoots like a dream now!

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Thomas

Gletcher NGT-R | Crosman 2240 | Crosman 2240 (Polished) | Frankenrifle (22xx derivative) | Slavia 618
Walther PPK/s | Umarex SA177 | Umarex XBG | Hatsan AT44 | Crosman Vantage | Baikal IJ-22


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