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Crosman valve mod

Discussion in 'Anything Airgun Related' started by dengiebob, Feb 23, 2014.

  1. dengiebob

    dengiebob Active Member

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    here we go guys get your thinking caps on!!. I'm building a custom Crosman 2060 body tube running a Hipac from the states. This Crosman has a power adjuster screw in the end cap which tightens the hammer spring. the Hipac kit came with its own hammer spring the fitting instructions said i might have to cut a turn or two off the spring to get it to cock. now i have just tried it with the spring uncut but it pushed the hammer down on the valve and held it open so i could not fill it but before cutting down the spring i have noticed some thing. With the valve in the body tube and the hammer and pin in the other end with the hammer all the way forward were it is just touching the valve pin there is still 10mm of travel left in the slot in the body tube could i shorten the valve pin rather than cut down the spring? on firing is there that much travel in the valve pin? i thought it just bounced open and is a longer hammer spring better than a short one your thoughts please gentlemen



    i don't need a rifle i gotta donk
     
    Last edited: Feb 23, 2014
  2. flatrajectory

    flatrajectory Keyboard Hero

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    The valves on co2 guns only open a fraction so shortening the valve pin is a good option.
    Pete.
     
  3. ped

    ped Keyboard Hero

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    cutting the valve stem isn't what i would do
    to fill even with a too powerful hammer spring just cock the gun first
    do you know which hammer spring it came with a hipac red or a green?
    the red one is too powerfull in the 22xx's i've used hipacs in i've found the green one or a 1377 one to be most suitable but factors like hammer weight ,fill pressure,what barrel length and caliber, what tuning work has been done to the valve and the tp size all influence the strength of the hammer spring needed to get as good a shot string as possible
    ped
     
  4. dengiebob

    dengiebob Active Member

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    I would have thought that the further the hammer travels the better it would be I'm not liking the thought of cutting the hammer spring down its got a boss valve from the states which has had the stem slimmed down under the transfer port its gonna end up with a 23 inch .22 barrel i have got a red and green Hipac springs its gotta a standard hammer which has been polished is the standard hammer weight ok?
     
    Last edited: Feb 24, 2014
  5. dengiebob

    dengiebob Active Member

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    hmmm thought i would have lots of replies on this! were are all the crosman heads????
     
  6. Ganton Gunner

    Ganton Gunner Super Moderator Staff Member Mod/Admin

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    just put the green one in and leave the valve alone
     
  7. ped

    ped Keyboard Hero

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