Furuno SEARCHLIGHT CH-250 - Manual (Page 30)

20
Checking manual raise/lower of soundome with hand crank
Perform this check after all wiring has been completed.
CAUTION
Turn the main power off before this check,
otherwise the raise/lower motor action may
cause injurely.
1. Turn off the breaker on the hull unit.
2. Detach the gear cover.
3. Set wrench (opposite side19 mm) to the screw shaft gear.
4. The transducer should rise/lower smoothly with even force in upper to lower limits. If not,
the centers of the shaft sleeve and the retraction tank are not aligned. Adjust the hull
mounting position if necessary. Check the following points.
•
Painting inside tank not smooth
•
Inner diameter of tank not uniform
•
Welding bead