5-9
MAINTENANCE
LIST OF TIGHTENING TORQUES
Nuts and Bolts (for ISO strength category 10.9)
Tighten nuts and bolts at the torques shown on the table below, unless otherwise specified.
• The tightening torques used for the mounted plastic covers are not listed in the table below.
Consult your sales or service dealer for details. They will be damaged if over tightened.
• When replacing nuts and bolts, replace them with nuts and bolts of the same size and
standards.
• Tighten nuts and bolts alternately (top, bottom, left then right) or in 2 or 3 times so that they
are evenly tightened.
SERVICE DATA
Classification
Head width (b) Size (a) x pitch
Tightening tor
que
General connection points
mm mm N·m ft-lb.
Coarse
10 M6 x 1.0 9.8±0.5 7.2±0.4
12, 13 M8 x 1.25 22.6±1.1 16.6±0.8
14, 17 M10 x 1.5 47.1±2.4 34.7±1.7
17, 19 M12 x 1.75 83.4±4.1 61.5±3.0
19, 22 M14 x 2.0 134.4±6.7 99.1±4.9
22, 24 M16 x 2.0 207.9±10.4 153.3±7.7
27, 30 M20 x 2.5 410.9±20.5 303.1±15.1
Fine
12, 13 M8 x 1.0 24.5±1.2 18.1±0.9
14, 17 M10 x 1.25 50±2.5 36.9±1.8
17, 19 M12 x 1.5 87.3±4.3 64.4±3.2
19, 22 M14 x 1.5 135.3±6.8 99.8±5.0
22, 24 M16 x 1.5 220.6±11 162.7±8.1
27, 30 M20 x 1.5 452.1±22.6 333.4±16.6
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