Furuno 1833 Installation Manual page 20

1.3.2 Mounting antenna unit of MODEL 1933/1943
Referring to the outline drawing at the back of this manual, drill five holes in the mounting
platform: four holes of 15 mm diameter for fixing the antenna unit and one hole of 25-30 mm
diameter for the signal cable.
Fastening the Radiator to the Radiator Bracket
For your reference, antenna installation materials list appears in the packing lists at the
back of this manual (see page A-4 to A-6).
1. Remove the radiator cap from the radiator bracket.
2. Coat contacting surface between antenna radiator and radiator bracket with silicone
sealant as shown in figure below.
ANTENNA RADIATOR
(bottom view)
Coat hatched area with
silicone sealant.
(MODEL 1933)
Coating the bottom of antenna radiator with silicone sealant
3. Coat threaded holes on the antenna radiator with silicone sealant.
4. Grease the O-ring and set it to the radiator bracket.
5. Lay the antenna radiator on the radiator bracket.
6. Coat the radiator fixing bolts (4 pcs.) with silicone sealant. Fasten the antenna radiator to
the radiator bracket with the radiator fixing bolts, flat washers and spring washers.
Radiator bracket
Fastening the radiator bracket to the antenna unit chassis
1-12
Groove
Radiator
Antenna
radiator
O-ring
Flat washer
Spring washer
Hex head bolt
(M8 x 30)
RADIATOR BRACKET
Coat hatched area with
anticorrosive sealant.
(MODEL 1943)
Coat threaded
holes with silicone
sealant.
Coat bolts with
silicone sealant.
(top view)
10mm