Smiths Kelvin Hughes Nucleus 3 5000 Series, System Handbook

Page: 183 / 510

UPMAST TRANS CEIVER (CAEA37) AND
TURN ING MECH A NISM (CAE-A42/41)
27 The Upmast Transceiver/Turn ing Mech a nism is
sup plied in two parts:
(1) Transceiver with gearbox.
(2) Antenna.
28 The ship’s mount ing struc ture must be ca pa ble of
with stand ing the high start ing and stop ping torque
g e n e r a t e d b y t h e m o t o r f i t t e d i n t h e u p m a s t
trans ceiver/turn ing mech a nism.
29
When mount ing the upmast turn ing mech a nism
ob serve the fol low ing:
(1) Use the fitting pack supplied with the equipment
(refer to Figure 4d). The fitting pack contains
fixings that have been tested to withstand the
stresses detailed in paragraph 33.
(2) Recommended tensile strengths and torque
loadings for the fixings are stated on the
installation diagram.
(3) For upmast transceivers/turning mechanisms
mounted in excess of 1.8m above the deck, it is
recommended that a service platform and guard
rail are fitted.
(4) Use a suitable jointing compound or sealant to
prevent corrosion between the platform and
upmast transceivers/turning mechanism.
(5) Any chipped or damaged surfaces must be
painted with polyurethane paint.
30
With ref er ence to Fig ures 4d and 5d, in stall the upmast
turn ing mech a nism as fol lows:
(1) Fit the coupling element and sealing ring to the
antenna connector.
(2) Fit the antenna to the upmast turning mechanism,
ensuring that the connectors are aligned, and
loosely secure using the eight M10 retaining bolts,
washers and nuts.
(3) Secure the co-axial connector using the three M6
bolts and washers provided.
(4) Tighten and torque load the eight antenna
retaining bolts to 25 Nm.
(5) Fit the spoilers to the antenna using the fittings
supplied.
(6) Mark out and drill four 17mm gearbox mounting
holes at the mounting position.
(7) For semi-rigid cable access mark out and drill a
100 mm hole in the mounting platform, as shown
on Figure 4d.
NOTE:
The upmast transceiver/turning mechanism is supplied
with four M12 bolts, washers and fibre washers. These may
be removed, but not discarded, and replaced with eye bolts.
Once the upmast transceiver/turning mechanism is in
position, the eye bolts are to be removed and replaced with
the original bolts.
Original 4d.7 May 01
KH 2020
Chap 4d
CAU TION
When Un packing The An tenna, En sure That The
Semi-rigid Co-axial Ca bles Are Not Kinked, Crushed
Or Bent. Sup port The An tenna Near Its Cen tre When
Lifting It Out Of Its Packing And When Fitting It Into
Po si tion On The Turn ing Mech a nism. Do Not Han dle
The An tenna By The Semi-rigid Co-axial Ca ble In put.
CAU TION
The An tenna Win dow Must NOT Be Painted.
CAUTION
When Ro tating The An tenna Do Not Ap ply Ex ces sive
Force.
En sure that the Semi-rigid Coax As sem bly, on The
Un
der side Of The An tenna, Is Not Crushed Or
Dam aged.
CAU TION
Fail ure To Fit An tenna Spoilers Will Re duce
Sys tem Life And Ren der The Ra dar In op er a tive
In High Winds.