User's Manual

SBS-900 Shore Based Radar Systems
Chapter 10: Corrective maintenance
KH-1602-2 issue 1: Standard SBS900 Systems Operator & Maintenance Handbook
Page 140 of 240
Replacement
Rotating joint
To replace the rotating joint, reverse the above procedure using the replacement
gasket+ \off_n [h^ N lcha `ioh^ ch nb_ mj[l_m ecn-
RF coupling
& azimuth
encoder
Reverse the removal process shown in section 10.5.4 pages 136 onwards.
Antenna
Reverse the removal procedure detailed in the above section.
- Dhmol_ nb_ l_jf[]_g_hn \off_n [h^ N lcha [l_ ]ill_]nfs chmn[ff_^ ch nb_
waveguide junction between the ro-jo and the antenna waveguide.
To avoid SharpEye
TM
SWR errors at start up, ensure that ALL connectors are
correct and secure. Pay particular attention to the coupling bullets, Ro-Jo to
Flexi Waveguide & Co-Ax Adaptor.
- Tighten and torque load the 12 antenna retaining bolts to 56 Nm and apply
Loctite 222 on their threads during assembly.
- Waterproof the waveguide joint by sealing with a layer of greased plastic
]igjioh^ mo]b [m G_hf_sm ]igjioh^ il C_hmi-Tape.
- After installation, the antenna should be checked to ensure that it can freely
rotate without obstruction.