Furuno FR-8045 Installation Manual page 14

1. HOW TO INSTALL THE SYSTEM
1.2.3 How to use the inside holes of the antenna housing (FR-8045)
This method requires removal of the RF unit from the antenna unit to access the inside
fixing holes. Use four hex head bolts, flat washers, spring washers and nuts (local sup-
ply) to install the antenna unit. Check the length of the bolts before you install.
Hex head bolt
M8×25,
2 pcs.
Hex head bolt
M10×20, 4 pcs.
Spring Washer
M10, 4 pcs.
1. Unfasten four bolts on the cover to open the antenna unit.
2. Disconnect the connectors connected between the upper chassis and the lower
chassis.
3. Remove two hex head bolts (M8×25) to separate the upper chassis from the lower
chassis.
4. Loosen four pan head screws to remove the cover from the pc board.
5. Remove the connector from the RF unit.
6. Loosen four hex head bolts to remove the RF unit.
7. Set the corrosion-proof rubber mat (supplied) to the support platform.
8. Cut the rubber bushings in the fixing holes and put four bolts from the inside of the
lower chassis. Fasten the lower chassis to the support platform with the spring
washers, flat washers and nuts (local supply). Apply marine sealant to the flat
washers, nuts and visible parts of bolts.
9. Assemble the RF unit, cover and chassis.
10. Set four caps (supplied) into the outside fixing holes.
11. Prepare the ground point on the platform. Use an M6×25 bolt, nut and flat washer
(supplied). The ground point must be within 300 mm from the ground terminal on
the antenna unit.
12. Run the ground wire (RW-4747, 340 mm, supplied) between the ground terminal
and the ground point.
13. Apply the marine sealant to the ground terminal and ground point. See the illus-
tration on page 8 for instructions.
Antenna unit chassis, upper chassis separated
Upper chassis
RF unit
Pan head screw
M3×8, 2 pcs.
Pan head screw
M3×8, 2 pcs.
Board cover
Square bushing
Lower chassis
9