Furuno CH-270 Installation Manual page 24

4. While pressing down on the upper dome assy., temporarily
set two self-locking screws to diagonal holes in the
soundome assy. Note that the self-locking screws do not
require washers.
5. Fit remaining eight self-locking screws, fastening the
screws in diagonal order. This is especially important for
the first four screws.
IMPORTANT!
When the soundome is installed in a
low ambient temperature
The soundome may shrink and become
difficult to fit to the upper dome assy. To
prevent this, warm it in water of approx
40°C (104°F) or leave it in room
temperature above 20°C (68°F) for at
least one hour.
When screw holes are not aligned
When screw holes on the soundome are
not aligned with screw holes on the upper
dome assy., insert a screwdriver in holes
to align them.
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