JRC JMR-92 Series Field Service Manual page 223

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 a box wrench of 11 mm × 13 mm or an open-end 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.
4-3 Chapter 4 Replacement procedure