Furuno FSV-85-MARK-2, Installation Manual

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1. HOW TO INSTALL THE SYSTEM
1-5
1.1.3 How to install the hull unit on the retraction tank
Weld the retraction tank and allow sufficient time for cooling. Install the hull unit as fol-
lows:
Prepare the materials and tools as shown below.
1. Clean the flange and O-ring groove of the retraction tank (welded to hull). Use
waste cloths moistened with ethyl alcohol.
2. Coat the O-ring and O-ring groove with lithium grease, then place the O-ring in its
groove on the tank flange.
3. Orient the hull unit so that the bow mark (inscribed on its flange) points toward the
ship's bow.
Note: If the bow mark on the hull unit flange is not facing the ship's bow, rotate the
transducer so that the bow mark on the transducer points toward the ship’s bow
(see section 3.9).
4. Confirm the following points, then place the hull unit on the retraction tank.
• Clean the flange platform.
• Wipe the undersurface of the hull unit flange with clean waste cloths.
• Keep O-ring in its groove.
Name Remarks
Screw wrench M20 (opposite side 30 mm)
Ethyl alcohol 99.5%
Waste cloths
Lithium grease
For O-ring and drive shaft Common lithium grease
(the equivalent of Daphne Grease MP #2 (IDEMITSU
KOSAN CO.,LTD))
Molytone grease For gear and bearing Molytone grease #2
(by SUMICO LUBRICANT CO., LTD)