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1. MOUNTING
1-9
• Refer to the procedure below for the location where the supplied liquid gasket
TB1121 is applied. For DS-781 (projection type) bottom tank, there is no place to
apply the liquid gasket.
1.4.2
How to install the transducer
DS-784 (Mounting of Flush Type Seachest)
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) (M12
×
25,
4 pcs.) with a socket screw wrench (size: 10
mm). Separate the seachest (2) and transduc-
er (1) from top cover (3). Handle O-ring (8)
carefully.
3. Align the "FORE" mark on the side of the
seachest to face the fore direction, parallel
with the fore-aft line of the ship (a 1 degree er-
ror margin is allowed), then weld the seachest
to the hull plate. 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 seal-
ant)” to face A of the 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 the seachest (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 fit the stop cover (3) on the hull
flange.
9. Tighten hex. socket bolts (9) with a socket screw wrench.
10. Fit the 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 on the transducer. These are sealing
screws and are required to maintain watertightness.
See Note.
(4)
(5)
(4)
(7)
(6)
(9)
(10)
(3)
(1)
(8)
(2)
Summary of Contents for DS-8500
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