JRC JMA-1032, Instruction Manual

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Chapter 1 INSTALLATION
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Installation and clamping method
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Installation direction
Installation should be done so that the cable gland is oriented toward the stern.
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Bolts, nuts and tightening torque to be used
■ Use stainless steel bolts for the scanner and uniformly tighten all of the bolts using
double nuts for each bolt so that the scanner will not become loose (Table 1-2-1).
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Although the length of the bolt will differ according to the thickness of the mount
base, use a bolt long enough so that more than 4 millimeters of thread protrudes
beyond the double nuts after the double nuts have been tightened.
Table 1-3-6-1 Length of scanner mounting bolts and tightening torque
Thickness of Mount Base (mm) Bolt Torque (N-m)
3-15 mm (Recommend) M8X30SUS (attachment) 20 N-m
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Use of washer and corrosion-resistant measures
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At the location where a bolt's head or nut comes in contact with the scanner chassis'
legs and the mount base, insert a plain washer which fits the bolt; and, at the location
where the nut comes in contact with the plain washer, insert a spring washer, and
then securely tighten the nuts .
■ To prevent corrosion due to the contacts between different metals, such as the
scanner chassis' legs, installation surface, bolts, nuts, etc., cover the bolt's head and
nuts with sealant .
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Grounding and corrosion-resistant measures
■ Do not install the scanner in place where puddles are often formed.