Furuno DS-80, Installation Manual

Page: 12 / 84

6
See Note
on page 6.
(4)
(5)
(4)
(7)
(6)
(9)
(10)
(3)
(1)
(8)
(2)
Mounting of Flush Type Seachest DS-784 (ref. Dwg. C7222-T06)
The seachest DS-784 is delivered temporarily assembled with the transducer.
1. Loosen lock nut (5) with a wrench (hex. size: 50 mm)
and take off cap nut (4) from top cover (3) together
with gasket (6) and flat washer (7). (It is not necessary
to draw the cap nut completely out from the cable.)
2. Unscrew hex. socket head bolts (9) (M12X25, 4 pcs.)
by using a socket screw wrench (size: 10 mm).
Separate the seachest (2) and transducer (1) from top
cover (3). Handle O-ring (8) carefully.
3. Weld the seachest (2) to the hull plate. Confirm that
the “FORE” alignment mark on the side of the
seachest faces the fore-aft line of the ship within 1
degree. The seachest should also be level with ship’s
normal trim within 1 degree.
4. Finish the outside hull plate with a grinder to ensure
smooth water-flow.
5. Apply “Kinoruster (Anti-crevice corrosive sealant)” to
face A of seachest (2), O-ring groove on the hull flange,
O-ring (8) and face A of the stop cover (3).
6. Fit O-ring (8) onto the O-ring groove.
7. Place transducer (1) into seacjest (2) so that the
alignment nipple on the transducer face fits into the notch on the hull flange.
8. Clean the hull flange face with a clean cloth and settle stop cover (3) on the hull flange.
9. Tighten hex. socket bolts (9) with a socket screw wrench.
10. Put gasket (6) and flat washer (7) over the transducer flange and tighten cap nut (4)
securely with a wrench (hex. size: 50 mm). Screw lock nut (5).
11. When running the transducer cable inside the conduit pipe, screw the pipe onto the cap nut
(PS3/4) for watertightness.
Note : Never remove the four flat head screws which seal screw holes, to maintain
watertighness.