7
PS3/4
129
HULL PLATE
130
30
24
54
A
R5
48
Bottom View
120
A
(4)
(7)
(6)
(5)
(9)(10)
(2)
(3)
(8)
(1)
Flush mount, Projection Type Seachest DS-783 (ref. Dwg. E7222-T-03)
1. Loosen lock nut (5) with a wrench (hex.
size: 50 mm) and take off cap nut (4)
from hull flange (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 (10)
(M12X32, 4 pcs.) by using a socket
screw wrench (size: 10 mm). Separate
flange (2) and transducer (1) from hull
flange (3). Handle O-ring (8) carefully.
3. Weld hull flange (3) to the hull plate.
Confirm that the “FORE” mark alignment
line on the side of the hull flange faces
the fore-aft line of the ship within 1
degree. The hull flange should also be
horizontal within 1 degree at ship’s
normal trim.
4. Finish the outside hull flange with a
grinder to ensure smooth water-flow.
5. Apply “Kinoruster (Anti-crevice corrosive sealant)” to face A of hull flange (3), O-ring groove
on the hull flange, O-ring (8) and face A of the flange.
6. Fit O-ring (8) onto the O-ring groove.
7. Place transducer (1) into hull flange (3) 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 flange (2) on the hull flange.
9. Tighten hex. socket bolts (10) with a socket screw wrench.
10. Put gasket (6) and flat washer (7) on top of 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 end onto the cap
nut (PS3/4) for watertightness.
Note :
Never remove the four flat head screws which seal screw holes, to preserve watertight
integrity.
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