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3. Temporarily install the waterproofing attachment on the top of the main shaft and make holes
for socket-set screws.
Waterproofing
attachment
a) Mark drilling point on the shaft surface by tightening M6 socket-set screws (2 pcs.)
b) Remove the waterproofing attachment.
c) Drill holes less than 2 mm in depth. The drill bit should be stainless steel, 5, 120° tip. Do
not drill holes through the shaft. Use a low rpm drill, and use cutting oil.
4. Remove the sheath of the transducer cable and wrap the sheath end vinyl tape.
Flange
5. Pass the main shaft through the main body flange and assemble the hull unit. Refer to chapter
1 for the assembling procedure.
6. Clean the top of the main shaft with alcohol, apply bond "Loctite 601" and install the water-
proofing attachment.
Waterproofing
attachment
• Tighten the M6 socket-set screws with a torque of 3.92 N·m to 4.9 N·m.
7. Assemble the hull unit completely, taking the following points into account.
1) The shaft retainer should be in contact with the waterproofing attachment.
2) The fastening band should not be used on the main shaft fitted with the waterproofing at-
tachment is used.
30 mm
O-ring
ø5 mm
L
L = Main shaft length + 100 mm
30 mm
APPENDIX 2 PROCEDURE FOR RETROFITTING
Push in fully. (O-ring will resist.)
Shaft
M6 socket-set screw
2 mm or less
Cut level.
Remove sheath
Clean with alcohol
and apply Loctite.
Shaft
AP-3
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