Furuno DRS4D - Manual (Page 9)

3
3. Use the hex bolts*, flat washers and spring washers removed at step 1, and fasten the
radome base to the platform. The torque should be between 19.6-24.5N
z
m.
*If the thickness of the platform is 6-10 mm, use M10x25 bolts (supplied). For thicker platform, use
locally supplied bolts.
4. Mount the cover tentatively. The cover is opened for wiring at Chapter 2.
1.3 Mounting Procedure for DRS4A/6A/12A/25A
Refer to the outline drawing at the back of this manual, and drill five holes in the mounting platform:
four holes of 15 mm in diameter for fixing the radar sensor and one hole of 25-30 mm in diameter
for the signal cable. The outline drawing shows two cable entrance holes, one on the radar sensor
and one on the rubber mat. Use only the one on the rubber mat.
1.3.1 Fastening the radiator to the radiator bracket
1. Remove the radiator cap from the radiator bracket.
2. Coat the surface of the radiator bracket with silicone sealant as shown in the figure below.
3. Coat threaded holes on the antenna radiator with silicone sealant.
4. Grease the O-ring and set it to the radiator bracket.
Flat
washer
Antenna base
assy.
Spring
washer
Platform
Hex bolt Apply silicone sealant.
(M10 x 25
or M10 x 20)
Transceiver
module
5 mm or under: M10x20 (local supply)
6-10 mm: M10x25 (supplied)
over 10 mm: locally supplied bolts
As for length, use the bolt
the "L" shown in the figure
in left becomes 10 to 15 mm.
L
RADIATOR BRACKET
(top view)
Coat hatched area with
silicone sealant.
10mm
(Do not coat.)