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Thread: Air Arms S400 service - dismantling tool needed.

  1. #1
    Sharp Shooter
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    Default Air Arms S400 service - dismantling tool needed.

    Ola forum people & airgun techies.

    To remove the inlet valve housing from the reservoir tube on older model S400 Air Arms it appears that a special tool is needed to get to grip it for the twist. This tool thingy looks very similar to the spanner for removing the retaining nut on a grinder when replacing the cutting disk, know what I mean?

    I tested my baby grinder spanner but it is a tad to wide for the fit. Where can I source the proper AA spanner for this?

    DSF.
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  2. #2
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  3. #3
    Sharp Shooter
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  4. #4
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    You may be able to use a heavy duty circlip pliers.
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  5. #5
    Sharp Shooter
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    Quote Originally Posted by crab View Post
    You may be able to use a heavy duty circlip pliers.
    As it happened I stumbled upon exactly that in my workshop whilst searching for tools for another project (converting my coal fired foundry to propane gas) and I immediately tried it out of curiosity. Does not fit due to pin diameter not matching. The Lane tool is on it's way.
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  6. #6
    REP: Atom Precision Sport

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    If you have access to drill press, make one, using a small piece if steel bar and two dowel pins ?

    Maybe a bush mechanic way:
    I've heard of people who's made these pig-nose type tools using a socket, two dowel pins and steel epoxy putty and then you use it with your normal socket wrench. If you don't have access to place that sells dowel pins buy two small drill bits of the correct size and cut of the spiral part.
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  7. #7
    Sharp Shooter
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    I would not trust dowels for such torque required as they will be spaghetti dimensions. The Lane tool is available on eBay at a fair price so I have ordered. Now just hoping the package will find its way to my post box via our wonderful SA postal service.
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  8. #8
    Sharp Shooter
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    you can also modify the grinder spanner by drilling and tapping holes in the right place. Screw some hard bolts into the tapped holes to the required depth....
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  9. #9
    Sharp Shooter
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    Not having had one of those tools, I have successfully removed the plug in the past using a simple method.

    Find some quality steel rod of a diameter that fits snugly into the holes in the plug and cut two lengths of about 15mm. Insert them into the holes and using an adjustable spanner open the jaws so it fits closely over the section of metal that the fig 8 clamp attaches to. The pins will act as purchase points against the spanner jaws allowing the plug to be unscrewed (and re-fitted).

    It is important that the pins are a close fit in the holes!

    One thing to bear in mind, if the plug has not been removed previously, the o-ring seal on the end plug will likely have a good grip on the reservoir and can take quite a bit of effort to free up, just go carefully and they usually yield.
    Last edited by Dale; 17-01-18 at 14:50.
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  10. #10
    REP: Ratel Sporting Airguns

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    TWO BALL BEARINGS AND A VISE GRIP
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  11. #11
    Sharp Shooter
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    Quote Originally Posted by UllUllA View Post
    TWO BALL BEARINGS AND A VISE GRIP
    Huh?
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  12. #12
    Sharp Shooter
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    Dale I like your idea. While I wait for the Lane tool I will try this with a large shifting spanner and the steel pins welded to that.
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  13. #13
    Sharp Shooter
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    You don't need to weld the pins to anything, given the small size of them you are asking for them to snap off.

    Just put them into the holes in the plug, but as said make sure they are a close fit.

    They need to be long enough to seat fully in the holes, with enough stick up to give a purchase point for the spanner to act upon and sufficient length to grip with a pliers to pull them out if they stick.
    Last edited by Dale; 18-01-18 at 11:37.
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  14. #14
    Protea FT Team '12/'13/'15/'16/'18
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    I'm 1 of 5 people that got all the tools and jigs needed for working on AA Rifles.
    They are not for sale to anyone.
    Louis should also have some of the tools since he WAS the importer.
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