APPENDIX 2 PROCEDURE FOR RETROFITTING
AP-3
3. Temporarily install the waterproofing attachment on the top of the main shaft and drill holes
for socket-set screws.
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,
I
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 with vinyl tape.
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, install the waterproofing attachment and apply
Loctite (supplied) to the lock-screw.
• Tighten the M6 socket-set screws with a torque of 3.92 to 4.9 N•m.
• Refer to page 1-6 for installing the waterproofing attachment.
Push in fully. (O-ring will resist.)
Shaft
M6 socket-set screw
Waterproof attachment
O-ring
30 mm
2 mm or less
Cut level.
ø5 mm
L
Flange
L = Main shaft 100 mm
Remove sheath
Shaft
30 mm
Waterproofing
attachment
Clean with alcohol
and apply Loctite.
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