Smiths Kelvin Hughes Nucleus 3 5000 Series, Системный справочник

Страница: 331 / 510

MAINTENANCE
19 The following paragraphs describe preventive
m a i n t e n a n c e . T h e d i a g n o s t i c s i n f o r m a t i o n
complements this (see paragraphs 13b to 18b).
PRE VEN TIVE MAINTENANCE
An tenna Radiator
20
Periodically wipe the antenna front Radiating window
using soap and water and a soft non-abrasive cloth.
Even a thin layer of soot or dirt can cause serious loss of
radar performance.
An tenna Mo tor/Gearbox
21 The antenna motor brushes should be checked every
6 months or 3000 hours, whichever is sooner. (Refer to
Figure 8b). At the same time, check the commutator for
wear. To check, proceed as follows:
(1) Remove the Transceiver Electronics Module,
refer to paragraph 30.
(2) Remove the Motor from the Transceiver case.
(3) Remove brushes from the housing and check for
wear, replace with new brushes if necessary.
(4) Refit brushes, ensuring brush retaining springs
are in place, and refit the motor into the transceiver
case.
22 The gearbox is lubricated at the factory, and should not
normally require attention.
23
Check that the antenna gearbox mounting bolts are
secure and kept free from corrosion.
An tenna Mo tor/Gear box and Brushless Motor
24
The High Speed Turning Mechanism/Gearbox and the
Brushless Motor PCB require no preventive
maintenance.
May 01 7b.8 Original
KH 2020
Chap 7b
CAUTION
Always switch the Radar OFF, and as an
additional precaution, Switch OFF the antenna
safety switch when working on the antenna.
CAUTION
NEVER PAINT the front radiating window
AT LE SS TH AN 2 m
RA DIO W AV E H AZA RD
DA NG ER
SHIM
SHIM
P
L1
P
L4
P
L2
PL3
CD-3606
BRUSHLESS MOTOR PCB
Figure 8b - Turning Mechanism: Showing Location of Brushless Motor PCB (CAE-A30-8 only)