Maeda CC423S-1, Operation Manual

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8. STANDARD TIGHTENING TORQUE
8.1 STANDARD TIGHTENING TORQUE LIST
Tightening at a torque beyond the specified range will cause the damage of tightened parts or
loosening, resulting in failure of malfunction of the Machine. Pay adequate attention to the
tightening operation.
Torque the metric bolts and nuts with no specific indication to the values shown in this table.
Adequate tightening torque is determined with respect to a width across flat (b) of a bolt or nut.
Nominal
size
a (mm)
Width
across
flat
b (mm)
Tightening torque {N·m (kgf·m)}
Target value Tolerance
6 10 13.2 (1.35) 11.8 – 14.7 (1.2 – 1.5)
8 13 31.0 (3.20) 27.0 – 34.0 (2.8 – 3.5)
10 17 66.0 (6.70) 59.0 – 74.0 (6.0 – 7.5)
12 19 113 (11.5) 98.0 – 123 (10.0 – 12.5)
14 22 172 (17.5) 153 – 190 (15.5 – 19.5)
16 24 260 (26.5) 235 – 285 (23.5 – 29.5)
18 27 360 (37.0) 320 – 400 (33.0 – 41.0)
20 30 510 (52.3) 455 – 565 (46.5 – 58.0)
22 32 688 (70.3) 610 – 765 (62.5 – 78.0)
24 36 883 (90.0) 785 – 980 (80.0 – 100)
27 41 1295 (132.5) 1150 – 1440 (118 – 147)
30 46 1720 (175.0) 1520 – 1910 (155 – 195)
33 50 2210 (225.0) 1960 – 2450 (200 – 250)
36 55 2750 (280.0) 2450 – 3040 (250 – 310)
39 60 3280 (335.0) 2890 – 3630 (295 – 370)
Tighten hoses with the respective values of torque specified in the table below:
Nominal
size
No.
Width
across
flat
a (mm)
Tightening torque {N·m (kgf·m)}
Target value Tolerance
02 19 44 (4.5) 35 – 54 (3.5 – 5.5)
03
22 74 (7.5) 54 – 93 (5.5 – 9.5)
24 78 (8.0) 59 – 98 (6.0 – 10.0)
04 27 103 (10.5) 84 – 132 (8.5 – 13.5)
05 32 157 (16.0) 128 – 186 (13.0 – 19.0)
06 36 216 (22.0) 177 – 245 (18.0 – 25.0)