Tightening Torques For Standard Bolts And Nuts - Yanmar 2TNV70 Service Manual

GENERAL SERVICE INFORMATION

TIGHTENING TORQUES FOR STANDARD BOLTS AND NUTS

Use the correct amount of torque when you tighten
fasteners on the machine. Applying excessive
torque may damage the fastener or component and
not enough torque may cause a leak or component
failure.
Item
Hexagon Bolt (7T)
and Nut
PT Plug
4-26
Nominal Thread
x Pitch
Diameter
M6 x 1.0 mm
M8 x 1.25 mm
M10 x 1.5 mm
M12 x 1.75 mm
M14 x 1.5 mm
M16 x 1.5 mm
1/8
1/4
3/8
1/2
Tightening Torques for Standard Bolts and Nuts
The tightening torque in the Standard Torque
Chart in General Service Information should be
applied only to the bolts with a "7" head. (JIS
strength classification: 7T)
• Apply 60% torque to bolts that are not
listed.
• Apply 80% torque when tightened to
aluminum alloy.
Tightening Torque
87 - 104 in·lb
(9.8 - 11.8 N·m;
1.0 - 1.2 kgf·m)
200 - 251 in·lb
(22.6 - 28.4 N·m;
2.3 - 2.9 kgf·m)
33 - 40 ft·lb
(44.1 - 53.9 N·m;
4.5 - 5.5 kgf·m)
58 - 72 ft·lb
(78.4 - 98.0 N·m;
8.0 - 10 kgf·m)
94 - 108 ft·lb
(127.5 - 147.1 N·m;
13 - 15 kgf·m)
159 - 174 ft·lb
(215.7 - 235.4 N·m;
22 - 24 kgf·m)
87 in·lb
(9.8 N·m; 1.0 kgf·m)
173 in·lb
(19.6 N·m; 2.0 kgf·m)
22 ft·lb
(29.4 N·m; 3.0 kgf·m)
43 ft·lb
(58.8 N·m; 6.0 kgf·m)
TNV IDI Service Manual
NOTICE
Remarks
Use 80% of the value at left
when the tightening part is
aluminum.
Use 60% of the value at left
for 4T bolts and lock nuts.
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