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Ship's framework
1.2.3
Preparation when a FRP retraction tank (inner diameter: 306
mm) is used
Note: The following procedure is required only when a FRP retraction tank (inner
diameter: 306 mm) is used. If a steel retraction tank (inner diameter 316 mm) is
used, skip the following procedure.
1. Unfasten the six countersunk head screws (M5×10) to remove the contact plate
(four locations). Discard the removed contact plates and screws.
2. Remove the three hex socket bolts (M4×8) that secure the spring assembly (four
locations).
3. Rotate the four spring assemblies by 90° in the direction of the arrow on the bot-
tom of the spring assembly, then secure the spring assemblies using the hex
socket bolts that were removed at step 2.
If you cannot rotate the spring assembly by hand, use a tool such as a wrench
whose hex size is 19 mm.
4. Check that the four rollers on the side of the tank guide are pushed inwards ap-
prox. 5 mm.
Countersunk head
screw (M5×10)
Spring
assembly
Roller
150-200 mm
Doubling plate
Stern
Fit doubling plates where the retraction
tank meets the frame and keel.
Contact plate
Spring
assembly
Hex socket bolt
(M4×8)
Rotate the spring assembly in the direction of the arrow.
1. MOUNTING
Reinforcement rib
added along keel line
Keel line
Bow
Minimum 12 mm
1-5
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