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1. HOW TO INSTALL THE SYSTEM
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
follows:
Prepare the materials and tools as shown below.
Name
Screw wrench
Ethyl alcohol
Waste cloths
Lithium grease
Molytone grease
Use the figure on the following page for reference when installing the hull unit on the
retraction tank.
1. Clean the flange and O-ring groove of the retraction tank (welded to hull) with ethyl
alcohol moistened waste cloths.
2. Apply lithium grease to the O-ring and O-ring groove. 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 that heading adjustment is required if the bow mark is not facing
the ship's bow. (See "How to Adjust the Heading" on page 3-9.)
4. Confirm the points as listed below, then place the hull unit on the tank.
• Clean the flange platform.
• Wipe the under-face of the hull unit with clean waste cloths.
• Keep the O-ring in its groove.
5. Apply a slight amount of lithium grease to the threads of the bolts to prevent
scorching. Insert the bolts with washers from the retraction tank flange, and then
put the flat washers and spring washers in this order from above. Fasten bolts with
nuts.
1-4
Remarks
M20 (opposite side 30 mm)
99.5%
For O-ring and drive shaft, common lithium grease
(the equivalent to Daphne Eponex Grease #2)
For gears and bearings, Molytone grease #2
(by SUMICO LUBRICANT CO., LTD)
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