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1. MOUNTING
4. 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 1.2.9).
5. Confirm the following points and place the hull unit on the tank.
• Clean the flange platform.
• Wipe the undersurface of the hull unit flange with clean waste cloths.
• Keep the O-ring in its groove.
• Place the hull unit so that the rollers on the tank guide do not contact the weld
bead on the retraction tank. If the rollers contact the weld bead, adjust the tank
guide position (see section 1.10.3).
6. Coat the threads of the bolts with a slight amount of lithium grease to prevent
scorching, then secure the hull unit to the retraction tank, referring to the following
figure.
Bow
Insulation packing
Detailed view: Bow side (11 places), Stern side (One place)
Spring washer
Gasket
Insulation
packing
7. Lower the transducer, then confirm that the rollers on the tank guide are not pro-
jecting from the retraction tank.
Tank guide must be positioned 30 mm inside from the bottom of the retraction
tank.
Note: The position for the lower limit switch can be raised 100 mm by using the bolt
holes on the flange assembly.
1-36
Hex nut
Spring washer
Flat washer
O-ring
Gasket
Flat washer
Hex bolt
Hex nut
Hex bolt
Detailed view: Stern side (Four places)
Gasket
Flat
Insulation
washer
packing
O-ring
washer
Stern
O-ring
Gasket
Insulation packing
Flat washer
Spring washer
Hex nut
Retraction
tank
Flat
Spring
washer
Hex nut
O-ring
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