JRC JMA-3400 Series - Maintenance of Each Unit

1
96
Chapter 10 MAINTENANCE AND CHECK
10.2 MAINTENANCE OF EACH UNIT
10.2.1 SCANNER UNIT NKE-2043, 2063A/AHS, 2103-4/4HS/6/6HS
DANGER
Wh
en con
d
uc
ti
ng ma
i
n
t
enance wor
k
on
th
e an
t
enna, ma
k
e sure
t
o
turn its main power off.
Failure to comply may result in electrocution or injuries.
Make sure to turn off the antenna operation switch.
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 "ON" the scanner unit safety switch.
¾ Precautions in Mounting the Cover
When the cover 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:
[NKE-2043]
z The proper fastening torque of the fitting bolts (M5) is 102.96 N•cm (10.5kgf•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.
z Use an 8mm wrench as a tool.
z 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.

ճ
ն
ձ
մ
յ
ղ
NKE-2043 Cover Bolt
Tightening Procedure
6-M5 (stainless steel) bolt
Tightening torque: 10.5 kgf/cm