8
Mounting of Projection Type Seachest DS-781 (ref. Dwg. C72222-T05)
1. Weld doubling plate (supplied by shipyard) to hull plate.
2. Remove the M10 bolts, and take out transducer fixing flange (2) (including transducer) from
transducer housing (1).
3. Determine the projection distance, and cut transducer housing (1). The horizontal error
should be within 1°.
4. Before beginning this step, remove the rubber gasket inside the thru-hull pipe to prevent it
from melting. After cutting a hole through the hull plate for the thru-hull pipe (φ36), weld the
thru-hull pipe to the hull plate.
5. Weld transducer housing (1) to doubling plate. Direction error from fore-aft line should be
within 1°. At stern side of transducer housing, make air exhaust holes (φ 10-20).
6. Through the thru-hull pipe, pull up the transducer cable into the ship. Be careful not to jam
the cable between the flange and housing. Next, using the two M10X30 bolts (“Kinoruster”
applied) fasten the transducer fixing flange to the transducer housing.
Note:
Never remove the four flat head screws.
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