Chapter 4 MAINTENANCE
4.2 MAINTENANCE ON EACH UNIT
4-2
4.2 MAINTENANCE ON EACH UNIT
4.2.1 SCANNER UNIT NKE-2043, 2063
DANGER
When conducting maintenance work on the antenna, make sure to
turn its main power off.
Failure to comply may result in electrocution or injuries.
During scanner unit maintenance, set the safety switch for
stopping the scanner unit to the "OFF" position.
Failure to comply may result in injuries caused by physical contact
with the rotating antenna.
Do not touch the radiator. Even if the power is turned off, the
radiator may be rotated by the wind.
After the work, turn "OFF" the scanner unit safety switch.
Notes for installing the radome (NKE-2043)
When the radome is removed for regular checkup and replacement of parts and refitted
after such work, the procedures of fastening bolts shall be taken with the following
precautions:
The proper fastening torque of the fitting bolts (M5) is 103 N・cm (10.5 kgf・cm)
(which makes the inside water-tight and protects the packings against permanent
compressive strain). Do not fasten the bolts with a torque exceeding the specified
value. Otherwise, the screws may be broken.
Use a box wrench or a wrench of 8 mm.
Screw all the bolts by hand first to prevent them playing, then fasten them evenly in
order not to cause one-sided fastening. (Fasten the bolts with 25% of the required
torque at the first step.)
*: Fasten the bolts in the diagonal order.
③
⑥
①
④
⑤
②
NKE-2043 Redome Bolt
Tightening Procedure
6-M5 (stainless steel) bolt
Tightening torque: 10.5 kgf cm
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