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FX Impact – Power Wheel Not Working?

Forums › PCP Airguns › PCP Airgun – Discussion › FX Impact – Power Wheel Not Working?

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  • February 20, 2017 at 11:22 am Link

    HavocX
    Participant
    Member

    Hey Guys,

    Had brother in-law hooked instantly into PCP airguns when he tried mine out few months ago…. so he goes out and grabs a new Impact  in .22 but he just sent me at text stating that the adjustable power wheel is giving almost the same speeds from MIN up to MAX.
    I had him take the wheel off and inspect the screw which he said was loose on MAX setting but still giving same velocities on all numbers and letters
    Any thoughts? 
    Thanks! 
     

    February 20, 2017 at 12:16 pm Link

    Tominco
    Participant
    Member

    Could it be the set screw backed waaay out? 
    Here’s a video about tuning your power wheel set screw. Make sure to put a little lock-tite on the set screw if you adjust it. 
    Also, the set screw (block?) can seem loose when the rifle is not cocked. Once you cock it, the spring should put tension on it.
    Tom

    February 20, 2017 at 12:24 pm Link

    Topcat
    Spectator
    Spectator

    “Tominco”Could it be the set screw backed waaay out? 
    Here’s a video about tuning your power wheel set screw. Make sure to put a little lock-tite on the set screw if you adjust it. 
    Also, the set screw (block?) can seem loose when the rifle is not cocked. Once you cock it, the spring should put tension on it.
    Tom

    
+1 

    May 2, 2020 at 2:34 pm Link

    Hunter82
    Participant
    Member

    Sorry to resurrect an old post (especially for my first post ever)

    I found this post because i have similar issues. My gun recently ate its c3 bumper and i replaced it with an improperly sized nylon washer (waiting on the part to arrive). So i assume your 2017 issue is solved but for the others like me who find this in a Google search , the power wheel issue could be linked to a broken c3 bumper that is interfering with the hammer.

    May 3, 2020 at 8:08 am Link

    Kitplanenut
    Participant
    Member

    Have a Mk-1 and a friend has a Mk-2 that are doing the exact same thing. It's not the set screw. Has to be inside. Have not taken apart to find the problem yet. I'm at a complete loss of what to look for with this problem. Reached out to FXUSA. They contacted me promising to get back, but never happened. So this will be another learning experience. I'll pass on what I find after completing. sylvan

    May 3, 2020 at 8:15 am Link

    DanielL
    Participant
    Member

    Just a heads up.  You should not adjust the hammer wheel with the gun cocked… especially not up to a higher setting.

    November 7, 2020 at 5:03 pm Link

    KevonJohnson
    Participant
    Member

    Hey. I have an issue right now that is entirely my fault. 
    I turned the power wheel while the gun was cocked now the adjustment screw isn’t holding any tension on the power wheel.

    how do I fix this problem 

    November 7, 2020 at 7:18 pm Link

    sniperlabyo
    Participant
    Member

    At factory setting there’s no preload on the hammer spring adjuster C10 while the gun isn’t cock unless you adjusted c9 to increase the preload to get more speed.

    Ernest 

    FX Team 

    November 7, 2020 at 7:22 pm Link

    Glem.Chally
    Participant
    Member

    sniperlabyo

    At factory setting there’s no preload on the hammer spring adjuster C10 while the gun isn’t cock unless you adjusted c9 to increase the preload to get more speed.

    Ernest 

    FX Team 

    Good catch!  Might be working normally and he might not have realized it.  The slider is supposed to be slack (be able to jiggle) until its cocked.

    November 7, 2020 at 7:32 pm Link

    sniperlabyo
    Participant
    Member

    HavocX

    Hey Guys, Had brother in-law hooked instantly into PCP airguns when he tried mine out few months ago…. so he goes out and grabs a new Impact  in .22 but he just sent me at text stating that the adjustable power wheel is giving almost the same speeds from MIN up to MAX. I had him take the wheel off and inspect the screw which he said was loose on MAX setting but still giving same velocities on all numbers and letters Any thoughts?  Thanks!   

    Here are some reasons why no speed difference between min and max on the power wheel.

    1. the valve adjuster is over adjusted CW on min so increasing PW to max has little affect.

    2. HSTA preload is over adjusted to a given reg pressure—-> reg pressure speed max out on min so no speed increase in max.

    3. Excessive lock tight on C9 will jam HSTA so adjusting has no affect.

    4. On high power mods with high reg, max preload on max PW  there will be slightly speed change to min on PW.

    5. PW is controlled by the VA, Reg pressure, HSTA preloud not the other way around.

    Ernest

    FX Team

     

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