29
Installing Above Deck Unit (ADU)
NOTE
• Position the antenna with the BOW direction parallel to the center line of the ship.
• Make sure the cable from the mast is aligned with the cable entry on the bottom of antenna for
stable connection.
• Refer to "11.1 Appendix A. Tightening Torque Specication" on page 92 for the bolt
tightening torque.
5.6 Mounting Antenna on Mast
Use the mounting holes to secure the antenna to the mast.
1. Bring M8 x 40L Hex Bolt sets for antenna-mast assembly from the ACU box.
2. Place the antenna on the mast and align the mounting holes of the antenna with those of the mast.
3. Before assembling bolts, apply Loctite #263 to the bolt threads to ensure the bolts are fastened rmly.
Insert the bolts and washers from under the mast into the radome, and lightly tighten them by hand
into the built-in nuts on the bottom of radome. Install 4 bolts in a criss-cross sequence as shown in the
gure.
4. After installing all 4 bolt sets, fully tighten the bolts using a torque wrench.
Figure 14: Installing Sequence of Bolts
1-1 2-2
2-1 1-2
Figure 15: Installing Bolts for Antenna-Mast Assembly
WARNING
If a bolt does not t into the mounting hole when installing the bolt by hand, stop installing
and check the bolt size. DO NOT tighten the bolts forcefully. It may cause damage to the inner
threads of the mounting holes of antenna. In this case, the damage is not covered by the
warranty.
Use a torque wrench.
M8 Flat Washer
M8 Spring Washer
M8 x 40L
Hex. Bolt (BUMAX)
x Four Times
BOW
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