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    Re: A-8A Bubble refill
    From: Eric van der Veen
    Date: 2012 Jan 24, 21:08 +0100

    Thanks. Makes perfect sense, and I only now understand the manual
    properly. Though in your first picture I'm sure you meant the other two
    screws (need the adjusting wrench).
    And yes, refill is needed. There is no liquid left inside the bubble
    chamber whatsoever. It's completely empty & dry, no bubble in sight.
    Obtaining hypodermic syringe, needle and xylene is in progress. I have
    the needle, an offer for 100 ml xylene. Now just need the syringe, which
    is more rare.
    Op 24-1-2012 0:36, Bill Morris schreef:
    > Eric,
    > Remove the two screws as shown in the first photo, to withdraw the
    > bubble unit.
    > Release the screw as shown in the second photograph and if the steel
    > ball underneath it doesn't drop out, give the unit a sharp rap on a
    > wooden bench to persuade it.
    > But before you begin, do you really need to refill it? Hold the unit
    > with the control uppermost and rotate the control backwards and
    > forwards to reduce the bubble. If the bubble is large, you may have to
    > do this thirty or forty times to get a suitable size. Only if you
    > cannot reduce the bubble should you do a refill.
    > You will need less than 10 mls of xylene, but you will waste some. 100
    > mls will be very adequate, but you may find you have to buy a litre.
    > Ronsonol cigarette lighter fluid (naphtha) is said to be a suitable
    > substitute if you cannot find xylene. Filling via a hypodermic syringe
    > and needle is easy to do, but xylene attacks plastic syringes, so do
    > not hesitate with the task.
    > Afterwards, replace the steel ball down the hole and freshen the slot
    > in the screw if it is damaged and tighten the screw on top of the
    > ball. To make sure of a seal, run some shellac around the top of the
    > screw.
    > Bill Morris
    > Pukenui
    > New Zealand
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