JRC JMR-5425-7X - Precautions in Mounting the Cover

15-9 Section 15 Maintenance & Inspection
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15.3.1.1 Precautions in mounting the cover
When the cover is removed for regular inspection 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 150 kgf•cm)
(which makes the inside water-tight and protects the packings against permanent compressive
strain). The packings start sticking out from the cover at a torque of approximately 1470 N•cm
(150 kgf•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 × 13 mm or a double-ended wrench of 13 mm × 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.)
* Fasten the bolts in the diagonal order.
[2]
[1]
[3]
[4]
[5]
[6]
[7]
[8]
[2]
[1]
[3]
[4]
4-M8 (stainless steel) bolt
8-M8 (stainless steel) bolt
Tightening torque: 120 to 150 kgf/cm
Tightening torque: 120 to 150 kgf/cm
Bolt Tightening Order of
NKE-2255 Cover
Bolt Tightening Order of
NKE-1130/1632 Cover
Bolt Tightening Order of
NKE-2632/2632-H Cover
[1]
[2]
[3]
[4]
[5]
[6]
6-M8 (stainless steel) bolt
Tightening torque: 380 kgf/cm
[1]
[2]
[3]
[4]
Tightening torque: 120 to 150 kgf-cm
4-M8 (stainless steel) bolt
Bolt Tightening Order of
NKE-2103 Cover