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BSA Ultra SE Single Shot Stripdown Guide

Discussion in 'Airgun Data Center' started by jay5488, Mar 7, 2014.

  1. jay5488

    jay5488 Donator

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    First off before I start, it is your responsibility to ensure your rifle is within the law at all times!!!!
    you must chrono your rifle after any work done where the power could be changed, If you end up in prison
    picking up the soap:eek:, its not my fault. Also if you damage your rifle whilst following these instructions please post pics
    so I can snigger like a schoolboy!!!:)

    Right, first things first!!
    Remove your scope and the stock, Stock is secured by a single allen bolt just forward of the trigger guard
    46474A51-B0DA-40A3-AEDD-01776234501E_zpsmpkkoirv.jpg

    And youll be left with this
    386BF98F-70D4-4BE4-B746-CE1716CDD755_zpslpkag5kh.jpg

    First job, Remove the stud which takes the bolt to fasten the stock to the action and put it somewhere safe.
    33120385-C9ED-4860-9B49-16287C9EEF70_zpsrr9owsfr.jpg

    Next, flip the action over and remove the slotted screw on the rear of the scope rail
    4E8B52BA-89BC-4C38-996B-408F7F729A36_zpsqydrzygs.jpg

    Next up is the cocking bolt, this bolt could be really ft and has threadlock on it so you may need to gently warm it up,
    or find someone stronger than you!!
    4735E49B-CD75-4254-8799-846835E1D084_zpskzmlywxm.jpg

    Once removed slide the pellet probe as far forward as it will go revealing a small caphead screw inside, undo and remove completely
    from the action.... Takes some wiggling!!!
    5FC100F6-FBEB-4285-A5FE-6E38C8B763A6_zpsuqql3csy.jpg

    Then, again, flip the action over to allow access to the trigger unit, remove the small caphead screw closest to the muzzle end
    of the action.
    4F63C04A-137D-4D66-A289-7DC20939D56B_zpsrjcmg1r9.jpg

    For this next caphead, you must have the anti tamper removed!!!! This one is at the rear of the trigger assembly, so support the unit
    on removal so it doesn't get damaged!!
    A05AEFCD-4FE1-4B98-9861-3229EE43FB57_zps4dnrzw9n.jpg

    And you'll end up with this,
    B3329465-4CBB-47DA-A131-988F501C2F69_zpsrbqbnlyw.jpg

    And this will drop out of the rear of the action,
    FAAD9011-0878-4BC2-B5FB-96B0192208C6_zps4uiugdla.jpg

    Looking inside the rear of the action you will see a seal and in the middle is a small caphead screw.....
    FFEAF92C-B24E-437E-8D7E-81AD9AFF60E0_zpsjmjig5vx.jpg

    Undo this and the hammer weight and seal will drop out....
    9FDF02C9-26B3-4238-8E32-97A78271052B_zpsvsxxwlza.jpg

    Working on the top of the action re-fit the cocking bolt and pull back the probe then locate the pellet loading tray, if you have a multishot you've more money than me so stop reading and ask
    a gunsmith!!!
    638138FD-8075-43EB-8813-F0A9DA632C0E_zpsyj4d6ru7.jpg

    Slide the pellet tray back to the rear of the action to reveal the small caphead screw.... Then remove it, whilst keeping a
    tight hold of both the breach block and the cylinder underneath, theres a small spring and ball bearing that will go piiiiiiiiing.........
    534CA33D-2061-44E8-9C48-A332C9605077_zpsrmwfr2kg.jpg

    Here they are
    C49F5956-483B-478D-B07D-98109117FB8D_zpsiy07xcx2.jpg

    With the action upside down you can see where the spring and ball bearing have come from, you then need to remove this clamp from the pellet
    probe......
    9B5EF3FC-3565-48D9-BF25-9B7378F73245_zpsn5gggzxo.jpg

    Allowing the pellet probe, sleeve and pellet tray to be slid out of the rear of the breach block....
    C25E65F9-9B3B-4BFD-9869-D19E09D285DE_zpsuqjehpa1.jpg

    And that's it!! here is an exploded diagram of all major parts, reassembly is very straight forward any problems and let me know but it is simple!!
    17BA898F-0C63-46C5-BD61-06568A591918_zpsiyore99a.jpg

    I polished up the hammer weight and the ends of the hammer spring so they were nice and smooth and shiny
    44CCCFFD-3800-4206-B378-FE17ED73224C_zpswah90kzh.jpg

    Also stripped the trigger and polished the sears.....
    3D1A2982-9559-4CF8-B2AC-CF6EDEA72E27_zpsa0leljzx.jpg

    3D1A2982-9559-4CF8-B2AC-CF6EDEA72E27_zpsa0leljzx.jpg

    I also got bored and decided to polish this, not really sure why?????
    17A5D952-77BC-4F6C-8931-517B042217E4_zpsk6tsqdhp.jpg

    Once rebuilt you will end up back at this stage, except my butt pad which was last seen in Mattys pocket.........lol
    4402548D-8AD6-49BE-B1FD-B0151E5C5D89_zpsomkbilfb.jpg



    Hope this is of use to someone as I did a lot of faffing to find all this info so I thought id get it all in one place.
    any problems and send me a pm......

    Jamie
     
    lone wolf and Gary Jones like this.
  2. Jackroadkill

    Jackroadkill Donator

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    Do you have to empty the cylinder before you strip the action?
     
  3. stevemandm

    stevemandm Honorary Member

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    good work and good guide jamie. am rather liking the wooden pointy thingy too ! ;)
     
  4. mattyts

    mattyts Donator

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    You will get your butt pad back soon ;)

    Great guide and nice pen too :rolleyes: :D
     
  5. jay5488

    jay5488 Donator

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    Depends if you've a deathwish or not, me yeah id highly recommend it!!!


    :eek: forgot that bit...... lol
     
    Gary Jones likes this.
  6. jay5488

    jay5488 Donator

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    ;)!!!!!
     
  7. SteveO

    SteveO Top Poster

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    Thanks for taking the time to post this Jay!

    Anyone planning to do one for the single shot MMC version?
     
  8. jay5488

    jay5488 Donator

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    I think the only difference is the pellet probe is slightly different and all the MMC linkage underneath, if anyone's got an MMC I can take apart I could edit the guide to suit both rifles.....
     
  9. jay5488

    jay5488 Donator

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    Mods, please can you move this to the airgun data section please, my bad...... lol
     
  10. Stevie Darling

    Stevie Darling Sexual tyrannosaurus

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    Nice guide mate!

    i thought about changing the spring on the pellet probe(mmc) if you forget to place your thumb on before it shoots out, it could bloody break a thumb:)
     
  11. gadjet

    gadjet Donator

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    Really interesting thread, having just bought an Ultra, I was wondering, how do you empty the air, dry firing? or is there an easier way?

    Cheers
     
  12. jay5488

    jay5488 Donator

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    Just dry fire until empty!! If your not sure it's empty hold a piece of tissue over the end of the barrel!!
     
  13. gadjet

    gadjet Donator

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    Thanks, I wondered if it was just that simple.
     
  14. Stevie Darling

    Stevie Darling Sexual tyrannosaurus

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    Once the hammer bounce is very apparent "fart"

    your almost there:)
     
  15. mattyts

    mattyts Donator

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    I always thought that noise was just the people at the range ;)
     
  16. jay5488

    jay5488 Donator

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    A blast tamer sorts all that out!!!!!
    I get 40 shots from my .177 now, no reg fitted!!
     
  17. gadjet

    gadjet Donator

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    What's a blast tamer when it's at home?
     
  18. The Robin

    The Robin Super Moderator Staff Member Mod/Admin

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    Great thread and a very interesting read with great info and pics :up:
     

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