Furuno FR-2125V Installation Manual page 9

Assembling the antenna unit
The antenna unit consists of the antenna radiator and the antenna unit chassis,
and they are packed separately. Fasten the antenna radiator to the antenna unit
chassis as follows:
1. For the XN20AF, XN24AF, attach two guide pins to the underside of the an-
tenna radiator.
2. Remove the waveguide cap from the radiator bracket. The cap may be dis-
carded.
3. Coat the waveguide flange with anticorrosive sealant as shown in Figure 1-2.
Hole for
guide pin
Figure 1-2 Coating the waveguide flange with anticorrosive sealant
4. Coat fixing holes for the antenna radiator with anticorrosive sealant.
5. Grease the O-ring and set it to the O-ring groove of the radiator flange.
6. Set the antenna radiator to the radiator bracket.
7. For the XN20AF, XH24AF, coat hex bolts (M8X40, slotted washer head, 8
pcs.) with anticorrosive sealant and use them to loosely fasten the antenna
radiator to the antenna unit chassis. For the XN12AF, coat hex bolts, flat wash-
ers and spring washers with anticorrosive sealant and use them to loosely fas-
ten the antenna radiator to the antenna unit chassis.
8. For the XN20AF, XN24AF, remove two guide pins (inserted at step 1), and
then tighten fixing bolts.
10 mm O-ring
5 mm
CAUTION
Be sure to remove the guide pins.
Injury may result if the guide pins loosen
and fall.
1-2
Anticorrosive sealant
Hole for
guide pin