My valve moves, stops firing

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  • loudhush
    Registered User
    • Jan 2002
    • 10
    #1

    My valve moves, stops firing

    I have just tried to fire up my old Mini-Mag, but i have run into a problem.

    My problem is that i can rattle of 3-5 shots quickly, but after that it seems to "stick". ie: the pin that comes out the back of the trigger does not return.

    I have noticed that if i hit the back of the valve with some decent force, i can hear the sear click back into place and i can rattle off 3-5 more shots...and the problem repeats.

    I have also noticed that the valve will move 1 or 2 mm from when I wack the valve to when it stops shooting. I think this is the root of my problem.

    I'm planning on buying a new rail, the one i currently have does have some signs of wear in the track that the rail bushing travels down...but before i do that i want to get other opinions as to what the problem may be.

    There are no visible signs of wear on the sear or the bolt.

    Does any one have some suggestions?
    Tags: None
    • JesseB
      Medallion Gold Plus Club
      • Apr 2003
      • 547
      #2
      If your valve is not stationary then the sear wont catch the bolt and the bolt will stick forward. The valve should have a pin in the bottom of it that locks into the rail if it doesn't have that it could be the root of your problem.
      RATPULSE SHOOTER

      GREAT Traders: xspyx, predfan66, eric13, Ring,James, Dansim, JadedT, phil16628 anyone I have forgot pm me I'll reference you also.


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        • Spider-TW
          U R techno-literate!

          • Oct 2006
          • 3554
          #3
          Originally posted by JesseB
          If your valve is not stationary then the sear wont catch the bolt and the bolt will stick forward. The valve should have a pin in the bottom of it that locks into the rail if it doesn't have that it could be the root of your problem.
          And the bushing that goes between the rail and grip frame should align the valve properly.

            Comment

            • Eatem Alive
              Wait...What?
              • Aug 2003
              • 1150
              #4
              Make sure you are using a HP tank as opposed to a LP tank. (stupid personal experience )
              My Feedback

                Comment

                • loudhush
                  Registered User
                  • Jan 2002
                  • 10
                  #5
                  Originally posted by Spider-TW
                  And the bushing that goes between the rail and grip frame should align the valve properly.
                  I don't know what bushing you are talking about. I just had a look at the blow up diagram...could you be a little more specific.



                  There is a pin in the valve that follows the track in the frame rail. There appears to be no wear on that part. But the frame rail is worn where that pin is supposed to sit.

                  Do you guys know if that pin holds the valve in place, is it strictly the field strip screw? Or a combination of the two?

                  And i'm running C02, I really dont' think this is an issue, when i first got this marker there was no issue...but it slowly developed over time.


                  Thanks for the replies. Let me know if you want to see pictures, i'll get some up tonight if you wish.

                    Comment

                    • Spider-TW
                      U R techno-literate!

                      • Oct 2006
                      • 3554
                      #6
                      Where the field strip screw goes through the grip, there is a copper sleeve that runs between the frame and the rail. If that is missing, it allows the field strip screw to move back and forth about 1 mm (probably about 1.59 mm).

                        Comment

                        • athomas
                          Of course it works-its AGD
                          • Jan 2002
                          • 8039
                          #7
                          Yes, as mentioned, it sounds like you are missing a rail bushing.
                          Except for the Automag in front, its usually the man behind the equipment that counts.

                            Comment

                            • loudhush
                              Registered User
                              • Jan 2002
                              • 10
                              #8
                              Originally posted by Spider-TW
                              Where the field strip screw goes through the grip, there is a copper sleeve that runs between the frame and the rail. If that is missing, it allows the field strip screw to move back and forth about 1 mm (probably about 1.59 mm).
                              Just to double check is this the part you are refering to?

                              http://store.airgundesignsusa.com/index.cfm?fuseaction=catalog.prodInfo&productID=403&categoryID=92


                              I'll double check my marker when i get home, and place an order tonight if it's not there. I'm pretty sure it is not though.

                              Thanks for your help

                                Comment

                                • secretweaponevan
                                  Only HALF Polish!
                                  • Sep 2007
                                  • 1132
                                  #9
                                  Originally posted by loudhush
                                  Just to double check is this the part you are refering to?

                                  http://store.airgundesignsusa.com/index.cfm?fuseaction=catalog.prodInfo&productID=403&categoryID=92


                                  I'll double check my marker when i get home, and place an order tonight if it's not there. I'm pretty sure it is not though.

                                  Thanks for your help
                                  That's the one.

                                    Comment

                                    • Spider-TW
                                      U R techno-literate!

                                      • Oct 2006
                                      • 3554
                                      #10
                                      Originally posted by loudhush
                                      Just to double check is this the part you are refering to?

                                      http://store.airgundesignsusa.com/index.cfm?fuseaction=catalog.prodInfo&productID=403&categoryID=92


                                      I'll double check my marker when i get home, and place an order tonight if it's not there. I'm pretty sure it is not though.

                                      Thanks for your help
                                      Yepper...it just sits in there and it often comes out altogether when you separate the frame and rail. It's easy to forget about and lose.

                                        Comment

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