8－2
JMA-9172-SA Instruction Manual > 8.COUNTERMEASURE FOR TROUBLE ... > 8.2 MAINTENANCE ON EACH UNIT
8.2 MAINTENANCE ON EACH UNIT
8.2.1 Scanner Unit NKE-1532
a. 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:
1) The proper fastening torque of the fitting bolts (M8) is 1176 to 1470 N/
cm (120 to 150kgf/cm) (which makes the inside water-tight and protects
the packings against permanent compressive strain).The packings
start producing from the cover at a torque of approximately 1470N/cm
(150kgf/cm). Do not fasten the bolts with a torque exceeding the
specified value. Otherwise, the screws may be broken.
2) Use an offset wrench of 11 mm X 13 mm or a double-ended wrench of
13 mm X 17 mm (not longer than 200 mm).
3) 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.)
• Turn off the main power source before starting
maintenance. Otherwise, an electric shock or injury
may be caused.
• Turn "OFF
i
" the safety switch to stop the scanner unit.
(Refer to Section 1.4 "EXTERIOR DRAWINGS".)
Otherwise, you may be injured if touching the rotating
scanner unit by accident.
i. After the work, turn "ON" the scanner unit safety switch.
• Do not touch the radiator. Even if the power is turned
off, the radiator may be rotated by the wind.
*Fasten the bolts in the diagonal order.
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