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7.11
Hull Unit (for Technicians Only)
The following procedures (outlined in this section) should only be conducted by a qual-
ified technician:
• Hull unit maintenance: section 7.11.1.
• Raising/lowering the transducer: section 7.11.2.
• Testing the brake in the hull unit: section 7.11.3.
7.11.1
Hull unit maintenance
Apply MOLYTONE grease
#2 every six months.
Replace anti-corrosion
zinc plates yearly.
Replace anti-corrosion
zinc plates yearly.
*
1
Equivalent greases:
SHOWA SHELL OIL: Shell Albania Grease S No.2
EXXON MOBIL: Mobilux EP No.2
NIPPON OIL CORPORATION: Multinox Grease No. 2
*
2
Equivalent coating:
CHUGOKU MARINE PAINTS, Ltd.: SEA GRANDPRIX 660HS
Note: For how to change the sonar oil, see section 7.4.
7. MAINTENANCE
Coat the drive shaft with Daphne
Grease MP No.2 (IDEMITSU
1
KOSAN CO.,LTD.*
) every six
months.
Raise transducer and coat main
shaft with Daphne Grease MP
No.2 (IDEMITSU KOSAN
1
CO.,LTD.*
) every six months.
Replace gasket if water is leaking
from the main shaft.
Dry dock ship and clean transducer
face yearly. Apply single coat of
2
"SEATENDER 20"*
anti-foulant to
transducer face to keep marine life
off the transducer. Do not paint
metallic parts such as the
transducer flange.
7-17
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