Furuno MARINERADAR FR-8122 Installation Manual page 14

1. MOUNTING
Using inside fixing holes of the antenna housing
This method requires removal of the RF unit in the antenna unit to access inside fixing
holes. Use hex head bolts, flat washers, spring washers and nuts (local supply) to mount
the antenna unit, confirming length of bolts.
1. Unfasten four antenna bolts on the cover to open the antenna unit.
2. Unfasten four screws on the RTB cover to remove it.
3. Unplug connector J827 and J834 on the RTB board.
4. Separate upper chassis from lower chassis by removing two hex head bolts (M8x25).
5. Remove RF unit by unfastening four hex head bolts.
7. Lay the corrosion-proof rubber mat (supplied) on the mounting platform.
8. Fasten the lower chassis to the mounting platform with hex head bolts, spring washers,
flat washers and nuts (local supply), and then coat flat washers, nuts and exposed parts
of bolts with silicone sealant. Cut a slit in the rubber bushing and insert bolt into the
bushing. Do not use seal washers.
9. Reassemble RF unit, cover and chassis.
10. Set four knob caps (supplied) into outside fixing holes.
11. Do steps 6-8 in "Outside fixing holes".
1-6
Hex. bolt(M8X25)
Antenna unit, opened
Hex. bolt(M10X20)
J827, J834
Remove from cable clamp