Disassembling and Reassembling the Towfish
4-3
4.3
Disassembling and Reassembling the Towfish
For troubleshooting purposes and for repair, it may be required to remove and
replace major components of the towfish. Instructions are provided in the
following pages for the disassembly of the towfish and the removal of the towfish
electronics chassis and the transducers.
The following tools are recommended:
• 2.5-mm hex key
• 4-mm hex key
• 5-mm hex key
• 8-mm hex key
• Tail cone retaining bolt (to be removed from towfish during
disassembly)
• Phillips screw driver
• Lint-free cloth or paper towels
• Silicone grease, such as Dow-Corning DC4
4.3.1 Disassembling the Towfish
To disassemble the towfish:
1.
Turn off the SP-III TPU or
Rack Mount TPU.
2.
Disconnect the tow cable
from the towfish and set
the towfish on a clean flat
surface such that the
carrying handles face up.
3.
By hand, loosen the tail
cone retaining bolt, and
then unscrew it until it is
free.
Figure 4-1:
Loosening the Tail Cone Retaining
Bolt
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