Furuno FR-8045 Installation Manual page 18

1. HOW TO INSTALL THE SYSTEM
1.2.5 How to use the inside holes of the antenna housing
(FR-8065/FR-8125/FR-8255)
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.
6. Lay the corrosion-proof rubber mat (supplied) on the mounting platform.
7. 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 marine sealant. Cut a slit in the rubber bushing
and insert bolt into the bushing. Do not use seal washers.
8. Reassemble RF unit, cover and chassis.
9. Set four knob caps (supplied) into outside fixing holes.
10. Do steps 6-8 in "Outside fixing holes" on page 8.
Hex. bolt(M8X25)
Antenna unit, opened
Hex. bolt(M10X20)
Remove from cable clamp
13
J827, J834