NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: A-8A Bubble refill
From: Eric van der Veen
Date: 2012 Jan 24, 21:08 +0100
From: Eric van der Veen
Date: 2012 Jan 24, 21:08 +0100
Bill, 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. Eric 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 > ---------------------------------------------------------------- > NavList message boards and member settings: www.fer3.com/NavList > Members may optionally receive posts by email. > To cancel email delivery, send a message to NoMail[at]fer3.com > ---------------------------------------------------------------- > > > >