![]() Even worse, watch out for the cover plate screws on the adjusting magnets. You snug the face plate down but don't over tighten, else the inner gasket can squeeze out. The glass face is held onto its thin gasket by a face plate with a cork gasket under it. If you see any sweating, you still have a leak. Leave it standing face down overnight, and look for sweating. You finally get lucky, with no bubble at all. The filler screw has a sealing washer.It's best filled with a throw-away syringe. It's helpful to use a little gasket cement on the front and back gaskets. The glass face can be chipped by too enthusiastic attempts to lift it out. ![]() The construction is a cast barrel with a front gasketed glass, and a rear rubber diaphragm. The oil swells the diaphragm, and a week later, it's leaking again. $20-$30 If caught short, don't try making a rear diaphragm from a truck inner tube, and refilling with lamp oil. Gasket and fluid kits are not that high.įrom Chief etc. A leak leaves you with a trembling indicator that won't indicate a heading with any reliability. The Airpath compass is meant to work in a fluid filled chamber.
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