Furuno CH-250 Installation Manual page 26

4. Fully screw main shaft into the soundome neck, and then unscrew by four turns. Coat
threads with adhesive (HIGH SUPER).
5. Screw in main shaft completely.
6. As shown in the drawing below, confirm that the narrowest gap between the tank guide, and
retraction tank in the range (20 to 170 mm) is within 0.5 mm.
Slide range
(Stroke) 250 or 400
20 mm (400 stroke) -
170 mm (250 stroke)
Coat threads with adhesive
(HIGH SUPER).
Applying Adhesive (HIGH SUPER) to main shaft
Tank guide
Tank and tank guide, sectional view
less than 0.5mm
16
Retraction tank